Roll over Einstein: Law of physics challenged (Update 3)
September 22, 2011 By FRANK JORDANS and SETH BORENSTEIN , Associated Press
This undated file photo shows famed physicist Albert Einstein. Scientists at the European Organization for Nuclear Research, or CERN, the world's largest physics lab, say they have clocked subatomic particles, called neutrinos, traveling faster than light, a feat that, if true, would break a fundamental pillar of science, the idea that nothing is supposed to move faster than light, at least according to Einstein's special theory of relativity: The famous E (equals) mc2 equation. That stands for energy equals mass times the speed of light squared. The readings have so astounded researchers that they are asking others to independently verify the measurements before claiming an actual discovery. (AP Photo)
One of the very pillars of physics and Einstein's theory of relativity - that nothing can go faster than the speed of light - was rocked Thursday by new findings from one of the world's foremost laboratories.
European researchers said they clocked an oddball type of subatomic particle called a neutrino going faster than the 186,282 miles per second that has long been considered the cosmic speed limit.
The claim was met with skepticism, with one outside physicist calling it the equivalent of saying you have a flying carpet. In fact, the researchers themselves are not ready to proclaim a discovery and are asking other physicists to independently try to verify their findings.
"The feeling that most people have is this can't be right, this can't be real," said James Gillies, a spokesman for the European Organization for Nuclear Research, or CERN, which provided the particle accelerator that sent neutrinos on their breakneck 454-mile trip underground from Geneva to Italy.
Going faster than light is something that is just not supposed to happen according to Einstein's 1905 special theory of relativity - the one made famous by the equation E equals mc2. But no one is rushing out to rewrite the science books just yet.
It is "a revolutionary discovery if confirmed," said Indiana University theoretical physicist Alan Kostelecky, who has worked on this concept for a quarter of a century.
Stephen Parke, who is head theoretician at the Fermilab near Chicago and was not part of the research, said: "It's a shock. It's going to cause us problems, no doubt about that - if it's true."
Even if these results are confirmed, they won't change at all the way we live or the way the world works. After all, these particles have presumably been speed demons for billions of years. But the finding will fundamentally alter our understanding of how the universe operates, physicists said.
Einstein's special relativity theory, which says that energy equals mass times the speed of light squared, underlies "pretty much everything in modern physics," said John Ellis, a theoretical physicist at CERN who was not involved in the experiment. "It has worked perfectly up until now."
France's National Institute for Nuclear and Particle Physics Research collaborated with Italy's Gran Sasso National Laboratory on the experiment at CERN.
CERN reported that a neutrino beam fired from a particle accelerator near Geneva to a lab 454 miles (730 kilometers) away in Italy traveled 60 nanoseconds faster than the speed of light. Scientists calculated the margin of error at just 10 nanoseconds. (A nanosecond is one-billionth of a second.)
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Given the enormous implications of the find, the researchers spent months checking and rechecking their results to make sure there were no flaws in the experiment.A team at Fermilab had similar faster-than-light results in 2007, but a large margin of error undercut its scientific significance.
If anything is going to throw a cosmic twist into Einstein's theories, it's not surprising that it's the strange particles known as neutrinos. These are odd slivers of an atom that have confounded physicists for about 80 years.
The neutrino has almost no mass, comes in three different "flavors," may have its own antiparticle and has been seen shifting from one flavor to another while shooting out from our sun, said physicist Phillip Schewe, communications director at the Joint Quantum Institute in Maryland.
Columbia University physicist Brian Greene, author of the book "Fabric of the Cosmos," said neutrinos theoretically can travel at different speeds depending on how much energy they have. And some mysterious particles whose existence is still only theorized could be similarly speedy, he said.
Fermilab team spokeswoman Jenny Thomas, a physics professor at the University College of London, said there must be a "more mundane explanation" for the European findings. She said Fermilab's experience showed how hard it is to measure accurately the distance, time and angles required for such a claim.
Nevertheless, Fermilab, which shoots neutrinos from Chicago to Minnesota, has already begun working to try to verify or knock down the new findings.
And that's exactly what the team in Geneva wants.
Gillies told The Associated Press that the readings have so astounded researchers that "they are inviting the broader physics community to look at what they've done and really scrutinize it in great detail, and ideally for someone elsewhere in the world to repeat the measurements."
Only two labs elsewhere in the world can try to replicate the work: Fermilab and a Japanese installation that has been slowed by the tsunami and earthquake. And Fermilab's measuring systems aren't nearly as precise as the Europeans' and won't be upgraded for a while, said Fermilab scientist Rob Plunkett.
Drew Baden, chairman of the physics department at the University of Maryland, said it is far more likely that the CERN findings are the result of measurement errors or some kind of fluke. Tracking neutrinos is very difficult, he said.
"This is ridiculous what they're putting out," Baden said. "Until this is verified by another group, it's flying carpets. It's cool, but ..."
So if the neutrinos are pulling this fast one on Einstein, how can it happen?
Parke said there could be a cosmic shortcut through another dimension - physics theory is full of unseen dimensions - that allows the neutrinos to beat the speed of light.
Indiana's Kostelecky theorizes that there are situations when the background is different in the universe, not perfectly symmetrical as Einstein says. Those changes in background may alter both the speed of light and the speed of neutrinos.
But that doesn't mean Einstein's theory is ready for the trash heap, he said.
"I don't think you're going to ever kill Einstein's theory. You can't. It works," Kostelecky said. There are just times when an additional explanation is needed, he said.
If the European findings are correct, "this would change the idea of how the universe is put together," Columbia's Greene said. But he added: "I would bet just about everything I hold dear that this won't hold up to scrutiny."
More information: The results are pre-published on ArXiv: http://arxiv.org/abs/1109.4897
Measurement of the neutrino velocity with the OPERA detector in the CNGS beam, arXiv:1109.4897v1 [hep-ex]
Abstract
The OPERA neutrino experiment at the underground Gran Sasso Laboratory has measured the velocity of neutrinos from the CERN CNGS beam over a baseline of about 730 km with much higher accuracy than previous studies conducted with accelerator neutrinos. The measurement is based on high-statistics data taken by OPERA in the years 2009, 2010 and 2011. Dedicated upgrades of the CNGS timing system and of the OPERA detector, as well as a high precision geodesy campaign for the measurement of the neutrino baseline, allowed reaching comparable systematic and statistical accuracies. An early arrival time of CNGS muon neutrinos with respect to the one computed assuming the speed of light in vacuum of (60.7 pm 6.9 (stat.) pm 7.4 (sys.)) ns was measured. This anomaly corresponds to a relative difference of the muon neutrino velocity with respect to the speed of light (v-c)/c = (2.48 pm 0.28 (stat.) pm 0.30 (sys.)) times 10-5.
©2011 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.
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Sep 22, 2011
Rank: 3.5 / 5 (18)
Were only talking 59 feet out of 2,397,120 or 0.00246 percent.
Sep 22, 2011
Rank: 4.1 / 5 (22)
If I throw you an apple but you catch a banana can we say anything meaningful about the speed of apples?
Of course it could always be due to neutron repulsion...(ducks beneath his desk)...
Sep 22, 2011
Rank: 4.6 / 5 (19)
Well first of all the article mentions that they have spent additional months confirming the test parameters. Secondly the margin of error, assuming their parameters are correct, is not enough to account for the significant difference in the actual results.
Additional testing is needed but if this proves to be true it would be a ground-breaking event and, like many other times in history, would force us to reconsider our fundamental physics and the part this potential new result plays in our understanding of the Universe.
Sep 22, 2011
Rank: 3.5 / 5 (8)
... or ~18m.
I had the same thought as I read that story. We had so many false alarms in the last months, I really think they should do the testing, before they postulate some new physics.
EDIT: Ok it seems they did tests over a few months.
Sep 22, 2011
Rank: 2.2 / 5 (11)
Sep 22, 2011
Rank: 2.6 / 5 (19)
:DD
Sep 22, 2011
Rank: 4.5 / 5 (30)
I'd remain *extremely* skeptical until another experiment can comment on the results.
Sep 22, 2011
Rank: 4.5 / 5 (21)
No one was looking for a neutrino burst at that time, and certainly if there was one we wouldn't have connected it to a supernova 4 years later.
Sep 22, 2011
Rank: 4.5 / 5 (11)
No idea why you got a one for that.
This was my first thought, something to do with the transition from muon to tau. Maybe it goes through some sort of tachyon phase (disclaimer, pure guess). Wait for more experiments and analysis is what I will do.
Sep 22, 2011
Rank: 3.5 / 5 (18)
Just how did they measure the speed of the particle?
How did they synchronize clocks? Or does that not apply?
Or is there something I'm seriously missing in how to measure the speed of neutrinos between two points on earth?
Sep 22, 2011
Rank: 4.5 / 5 (10)
Legitimate questions from Kev. I am VERY impressed. See guys, even creationists can change a be eager to learn. This comment also implies that he recognizes the integrity of science itself. I'm leaning towards multiple personality disorder, but I have faith that he's growing as a person. Get it? Just playin. :)
I'm sure someone can answer better, but here goes:
Measuring speeds is inherent in the system, right? That's the main goal, measuring energy, momentum, etc, right? I assume the margin of error includes the timekeeping margin for whatever atomic clocks they use. How? Identical atomic clocks at each detector, maybe. ????
Sep 22, 2011
Rank: 4.7 / 5 (11)
I envision a new multi-billion $ program; a 500 mi long evacuated tunnel in which a beam of light can be sent next to a neutrino beam.Oh come on. Three million people just asked those same questions and some of them arent even jesus freaks.
Sep 22, 2011
Rank: 2.2 / 5 (17)
Briefly speaking, in completely flat space-time the neutrinos couldn't travel faster than light, but our space-time is not completely flat - everyone can detect with microwave antenna, how it undulates. So we can observe various (subtle) violations of relativity too.
It could be actually quite good idea.
Sep 22, 2011
Rank: 4.4 / 5 (18)
Yeah, but at least he didn't question the integrity of every scientist ever or evangelize. It's a sign of a step in the right direction, is all. Not much, but worth a vote higher than 1, at least, which is unprecedented, afaict. Maybe he had a short in the brain and he remembered his meds today. Maybe he got laid. Maybe he's 16yrs old now and FINALLY questioning his Gideon parents? It's a change.
Sep 22, 2011
Rank: 4.3 / 5 (13)
1. Perhaps it has a small probability of temporarily existing at a velocity slightly greater than the speed of light (or goes back in time, same thing I think) via some sort of quantum fluctuation in where its already tiny mass can temporarily become slightly negative or even imaginary.
2. It Might be in some sort of exotic mixed state where it is part neutrino and part tachyon that happens while it changes between the different neutrino types.
Sep 22, 2011
Rank: 4.8 / 5 (11)
yup.
They don't say how they did the experiment in this article, but it's not a corporate trade secret - it is open and collaborative science. If you want to know exactly how they did it, read the actual paper. I guarantee it is all laid out in there.
Sep 22, 2011
Rank: 2.5 / 5 (6)
Sep 22, 2011
Rank: 4.9 / 5 (12)
That said, I'd wish fervently that I lose that bet.
Sep 22, 2011
Rank: 5 / 5 (12)
"The physicists decoded a burst of neutrinos with a single, eerie message: 'Oh God, it's happening again'".
Ya heard it here first.
Sep 22, 2011
Rank: 5 / 5 (6)
Sep 22, 2011
Rank: 4 / 5 (4)
You get 5 stars just for the comment on neutron repulsion.
Sep 22, 2011
Rank: 4 / 5 (8)
Having said that, its worth a huge investment to insure this is bogus, and I sincerely hope its not. The kind of brouhaha that would result from a true faster than light discovery would blow the lid off the physics community and I would be tickled to see that happen. I am guessing a large majority of the physics community feels the same way.
Sep 22, 2011
Rank: 1 / 5 (8)
Has anyone done that?
Sep 22, 2011
Rank: 1 / 5 (5)
Sep 22, 2011
Rank: 1.5 / 5 (8)
- The Neutrino Oscillation causes "gaps" in the measurements.
Sep 22, 2011
Rank: 4 / 5 (5)
When they figure it out the resulting facepalm will be so powerful that it will be felt around the world.
Sep 22, 2011
Rank: 1.3 / 5 (16)
Yes, Einstein never contemplated Neutrino/Neutrino repulsion to be the kissing cousin of the Neutron star/Neutron star repulsion that powers the stars we can't see.
Sep 22, 2011
Rank: 3.7 / 5 (12)
To a neutrino, there isn't much difference between a solid planet and a vacuum. But even if there were the correction would be the other way around - arrival would be further delayed, not accelerated.
Sep 22, 2011
Rank: 3.6 / 5 (17)
Ya, you just have to tunnel through the center of the earth - past the aliens who have constructed a space port at the core and then shine a laser though and back.
Trivial. Until the aliens notice.
Then your toast.
Sep 22, 2011
Rank: 4.6 / 5 (5)
The previous comment about the 1987 supernova brings up a good point except that instruments werent out there in 83 I don't believe? Researchers should be able to check current supernova data, calculate the time neutrinos should have been here and look at older data for said neutrinos at the right day/time.
Sep 22, 2011
Rank: 4.8 / 5 (10)
Yeah, straight through the Alps. It was easy. I have discovered a truly marvelous method for this, which this post limit is too narrow to contain.
Sep 22, 2011
Rank: 1.7 / 5 (6)
Sep 22, 2011
Rank: 3.6 / 5 (5)
Sep 22, 2011
Rank: 3.8 / 5 (4)
Figuring the distance accurately is not trivial.
Also synchronizing two sites to an absolute time is not trivial either.
Hopefully they are not depending on GPS alone.
Sep 22, 2011
Rank: 5 / 5 (8)
Apparently you are either unaware of sockpuppets that mimic other names or the capacity for sarcasm. Check the name very closely. It's not omatumr.
Sep 22, 2011
Rank: 1.5 / 5 (15)
Sep 22, 2011
Rank: 3 / 5 (3)
Sep 22, 2011
Rank: 4.6 / 5 (9)
Sep 22, 2011
Rank: 1.2 / 5 (5)
Sep 22, 2011
Rank: 3 / 5 (1)
Sep 22, 2011
Rank: 1.2 / 5 (20)
Sep 22, 2011
Rank: 3 / 5 (4)
Sep 22, 2011
Rank: 5 / 5 (1)
Under the keel of a ship is Amrit Sorli.
At the end of the keel is the propeller.
http://www.physor...ion.html
Sep 22, 2011
Rank: 5 / 5 (4)
haha Maybe a primordial black hole passed through the Alps at just the right time. ;)
Sep 22, 2011
Rank: 1 / 5 (12)
That being said. what will this do for us? like right now. Probably nothing. than after like ten years later you still won't be able to use these facts for anything.
Another dimension? he, hehe, hahahahahahaha! Well O.K. maybe.Hopefully they'll have cheap but reliable jet-packs in this parallel dimension and we will be able to travel to a europe-like country on a budget without a passport.THAT would be Good.
Sep 22, 2011
Rank: 3.6 / 5 (8)
No, because everything in the universe has relativistic mass (including photons), and you can't ignore mass in the equation no matter how small it is.
Sep 22, 2011
Rank: 2.7 / 5 (6)
/sarcasm
Sep 22, 2011
Rank: 2.5 / 5 (8)
For a massless particle like a photon, time slows by a value equal to gamma. At the speed of light, time stops, and thus, photons don't experience time at the speed of light. If they're not experiencing time, that doesn't imply in any fashion that beyond the speed of light gamma starts to work in any other fashion... didn't anyone read the article? The authors don't believe that anything interesting is happening. They just want to figure out if they made a math error or have a contaminant in the dataset.
Geez, isn't anyone here an actual scientist? I remember this stuff from 101. Am I surrounded by middle school science teachers? You find an arrowhead in the dirt, you assume it came from a Native American, not a man from mars. The remarkable lack of critical thinking skills shown here is seriously shameful.
Sep 22, 2011
Rank: 4.9 / 5 (12)
Well, a couple of decades after E-MC^2 we were splitting atoms, blowing shit up, getting things done, ya know? MAN SHIT. ;) No, really. Technologies are adapted and engineered MUCH more quickly these days. The real question is: how long until we understand what the heck just happened?
MAN!! Why do people feel the need to so highly doubt science and engineering, and by implication, its purpose and value? HELLLLOOOOOO??? Is that a supercomputer in your pocket or are you just happy to see me?
Sep 22, 2011
Rank: 3 / 5 (2)
Sep 22, 2011
Rank: 5 / 5 (13)
I would hope they are doing better things. Like, I don't know, science.....on a science /making/ website instead of a science /news/ website. Scientists, some of the smartest and best, spent 3 MONTHS trying to find their errors, and didn't. Now you are criticizing us laymen for speculating?? o k
Sep 22, 2011
Rank: 4.5 / 5 (2)
Sep 22, 2011
Rank: 2.3 / 5 (6)
Photons have a rest mass of zero, but they have a relativistic mass a consequence of motion. A rest mass of zero is only deduced through e=mc^2, if a particle can move at the speed of light, it must have zero rest mass, but they will still have relativistic mass.
Edit: What I'm saying is that in principle, nothing in the universe can have a mass of zero.
Sep 22, 2011
Rank: 3.7 / 5 (3)
Sep 22, 2011
Rank: 1 / 5 (1)
Sep 22, 2011
Rank: not rated yet
http://www.bbc.co...15017484
It also seems to have a few more useful 'related links' as well.
I sincerely doubt that the Einstein formulae are actually wrong; more like incomplete. More likely is the case that there is a small constant missing somewhere in it. I've already been wondering about THAT possibility for a while now. Also, this kind of 'minor adjustment' would very much allow for both the article and 4RMO's statements. btw, I'm only stating this as a POSSIBLE option. I'm going to follow this with interest and wait and see.
by the way: spammer/abuse alert:
crazy00123 has already posted the same message for a dating service elsewhere!
Cheers, DH66
Sep 22, 2011
Rank: 5 / 5 (1)
Still not getting it. I get the part about 0 mass being a deduction from E=MC^2. I also get how when already massive particles (at rest) get accelerated, their mass increases. I DON'T get how relativity says something with no mass to begin with can obtain mass or appear to have mass from an outside observer.
Sep 22, 2011
Rank: 5 / 5 (1)
I was just trying to explain the same thing to the wife. If it were *wrong* it wouldn't test so well, GPS wouldn't work, etc. I was thinking "of course it's incomplete." We can't use it to predict *everything.*
Sep 22, 2011
Rank: not rated yet
More comments here:
http://www.telegr...ght.html
Sep 22, 2011
Rank: not rated yet
Sep 22, 2011
Rank: 5 / 5 (5)
Do you want to stick with that statement?
Sep 22, 2011
Rank: not rated yet
Confirming a measurement like this is some physics and a whole lot of engineering. For example: How do they know exactly where (within one ns is a good target accuracy) the particles are generated, and when (again 1 ns is good)? How long is the pulse and what's its profile? How is the pulse detected? How is timing determined, common GPS satellite in view? What's the detector response time statistics versus just about every possible parameter? And on and on. Probably the answers are simple, but the procedure is to go grindingly thoroughly from zero to one. No shortcuts, nothing ignored and nothing forgotten. 60 ns is a whole lot, based on available techniques. 10 ns accuracy is way more than the timing and positioning accuracy capability if done correctly. So I suspect generators and detectors are more problematic here.
Sep 22, 2011
Rank: 5 / 5 (4)
Nearly massless and massless are two quite different things.
Neutrinos are the former; photons, the latter.
Sep 22, 2011
Rank: 5 / 5 (2)
The evidence for neutrinos being tachyons is growing. There are three flavors of neutrinos, and for neutrino oscillations to occur, they must all have non-zero masses. All three flavors have extremely small masses, if the masses are real. If they are imaginary? (Caught you there. ;-) The experiments looking for neutrino masses actually look at the momentum squared (M^2). If the mass is imaginary, the momentum squared can be negative, and of course, any experiment that cannot rule out zero masses for neutrinos can't rule out negative values for M^2. Experiments resulted in negative (mean) values, but the confidence bounds still include zero and small positive masses. Some experiments measure the difference between masses of two different flavors, a detail.
Sep 22, 2011
Rank: 3.5 / 5 (2)
Sep 22, 2011
Rank: not rated yet
http://www.guardi...eutrinos
Sep 22, 2011
Rank: 5 / 5 (3)
Sep 22, 2011
Rank: not rated yet
Could it be that we have here another experiment that will profoundly reshape the foundation of physics?
Sep 22, 2011
Rank: 1 / 5 (1)
Could it be that we have here another experiment that will profoundly change the face of physics?
Sep 22, 2011
Rank: 1 / 5 (1)
Sep 22, 2011
Rank: 5 / 5 (1)
Also, probably means that E=MC^2 does not correctly account for the amount of energy.
Sep 22, 2011
Rank: 1.8 / 5 (4)
To me it would say that energy is equal to mass, ect... Einstein must have been right in a time where smaller sub-particles were simply an unprovable fascination; his math is not tainted one bit. On the other hand, what does that do for that one wheelchair guy.. What does this mean for black holes? Maybe there is an inner sub-Schwartz radius that can be calculated and measured through observational means.
By the way, I thought that you would get there before you started if you breached the threshold of light.
Sep 22, 2011
Rank: 5 / 5 (4)
Photons have zero rest mass (also known as Newtonian mass), but they are never at rest - they're energetic and always move at c (in a vacuum). Through this motion they have the property called relativistic mass/momentum (mass and energy are related) and so can deliver quite a punch when they hit a target.
Sep 22, 2011
Rank: 1 / 5 (2)
Sep 22, 2011
Rank: not rated yet
Sep 22, 2011
Rank: 5 / 5 (3)
No. The speed limit isn't an arbitrarily derived measure or one prone to imprecision. The constant is vital to all our models of reality.
Less than what? Zero is pretty much it (photons), but if you're suggesting <0 mass, then you're off into the highly speculative, for which there is no current evidence.
See above. In any case, neutrinos DO have a tiny measured mass, so they are heavier than photons.
Sep 23, 2011
Rank: 5 / 5 (4)
Here are a few observations which might be possible sources of error. The measurement is statistical in nature. You cannot emit a neutrino and follow it all the way to the other end for measurement (it may not interact, it may be of a different flavor, it may be a spurious external detection, etc). So you need to send billions of them and make a statistical analysis.
Do we really know the oscillation rates of neutrinos to such a high precision? Have the variations in the Earth's gravity field along the journey been factored in (yes, it would be a small effect, but the claimed precision of the results is very high).
I await further analysis and secretly hope something new is uncovered.
Sep 23, 2011
Rank: 5 / 5 (1)
Sep 23, 2011
Rank: 5 / 5 (1)
THEORETICAL particles.
And, to be consistent with Einstein's Mass-Velocity Equation, they either:
1) Travel Forward in Time with Imaginary Mass; or
2) Travel Backwards in Time with Real Mass.
Either way, they're consistent with the maxim that we can never OBSERVE an object traveling faster than light.
Sep 23, 2011
Rank: 5 / 5 (2)
CERN have state of the art atomic clocks and I'm sure Gran Sasso have similar clocks perfectly synchronized, these guys are not using GPS for timing. The timing would be the first place to look for errors together with the distance measurement.
Sep 23, 2011
Rank: 5 / 5 (3)
59 feet is a huge distance in the physics world. Also this is the first thing they would check together with the synchronization of the atomic clocks used. They must feel very confident about the distance measurements and timing before presenting these results.
Sep 23, 2011
Rank: not rated yet
It isn't like the earth changes because of all tectonic movement?
If they sent neutrinos and then another particle and it keeps having a considerable timeframe difference in the arrival vs the start, then they can say it goes faster than light, but at these distances and precisions you can always think of another thing.
Unless it was some kind of gravity wave or something (wich then it would mean that c isn't constant in every kind of gravitational area). And it would kill all actual gravity waves detectors of nowdays (like: Fk it, lets use neutrinos instead of lasers).
Still cant wait for Physics labs in space.
Sep 23, 2011
Rank: 3 / 5 (2)
We are limited, so to is our knowledge, and equally limited is our ability to gather knowledge. Therefore our expectation of understanding should be humble.
Sep 23, 2011
Rank: 3.7 / 5 (3)
Sep 23, 2011
Rank: 5 / 5 (1)
How can a particle with real mass have less mass than a photon with zero rest mass?
Sep 23, 2011
Rank: not rated yet
Fringe tonight only on FOX
just saying
Sep 23, 2011
Rank: 5 / 5 (1)
There is no such assumption. It is well known that photons are slowed by matter, and that they too are subject to the gravitional force.
Why should a particle with a non-zero mass (neutrino) travel faster through any medium than does one with a zero mass (photon)?
Sep 23, 2011
Rank: 5 / 5 (3)
http://arxiv.org/...4897.pdf
The distance covered by the neutrinos was measured with an uncertainty of 20 cm and they also did some comprehensive work on getting the timing correct.
Sep 23, 2011
Rank: 5 / 5 (1)
I am sorry about the classes but were you out of country all summer. they announced SG:U cancellation back in April I think. I was bummed myself. I thought everybody knew and the way they ended it was atrocious.
Sep 23, 2011
Rank: 5 / 5 (2)
A key feature of the neutrino velocity measurement is the accuracy of the relative time
tagging at CERN and at the OPERA detector. The standard GPS receivers formerly installed at
CERN and LNGS would feature an insufficient ~100 ns accuracy for the TOF
measurement.
Thus, in 2008, two identical systems, composed of a GPS receiver for time-transfer applications
Septentrio PolaRx2e [16] operating in common-view mode [17] and a Cs atomic clock
Symmetricom Cs4000 [18], were installed at CERN and LNGS (see Figs. 3, 5 and 6).
Sep 23, 2011
Rank: 5 / 5 (2)
Pages 9 and 10 describes the accuracy of the timing and distance measurements. Pretty convincing stuff!
Sep 23, 2011
Rank: 5 / 5 (4)
Sep 23, 2011
Rank: 5 / 5 (2)
http://hyperphysi...no3.html
http://assa.saao....erse.doc
Cheers, DH66
Sep 23, 2011
Rank: 1 / 5 (4)
Sep 23, 2011
Rank: 5 / 5 (1)
So, please explain yourself!
DH66
Sep 23, 2011
Rank: 4 / 5 (1)
Sep 23, 2011
Rank: 1 / 5 (2)
Sep 23, 2011
Rank: 5 / 5 (2)
It's important to keep in mind that dark matter isn't just adding mass to the universe, it is distributed in a lumpy fashion roughly matching the placement of the galaxies. Light does not create blobs like that.
Sep 23, 2011
Rank: not rated yet
They are made of EM field, while neutrino is mainly a construct of the field corresponding to the weak interaction - we know the speed of EM field propagation, but are there any experiments showing that weak interaction field has exactly the same propagation speed? (up to 1/40000 precision like in above experiment).
It is like we are sure of gravitational masses, but in fact we know them well only for basically uncharged matter - mainly nucleons. Was there any experiment showing that it is in fact the same for a single electron? (hint: there wasn't Stern-Gerlach made for electrons...)
Sep 23, 2011
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Sep 23, 2011
Rank: 3 / 5 (2)
We have here what we can call the next step in physic. When Einstein wrote his theory of relativity he stepped on the throat of the law of gravitation which is still alive and kicking.
What i mean is, no physics is absolute, with the gravitation in certain case we have to go beyound the limitation of the model, and the same thing is going to happen tho the relativity, we will have to go beyound, not because it is a false theory but because we have reached the limit of what is possible with the relativity model. And that it is not "nothing can go faster than the speed of light" but "something" can eventually go faster than the speed of light, in an other scale of physic.
We had, do have and will have:
Law of Gravitation (I. Newton)
Law of Relativity (E. Einstein)
Law of "something else" (X)
Some theories "exotic" are also using particles faster than light, tachyons, that bypass the "forbidden" Einstein having a non-zero mass, but so-called "imaginary".
Sep 23, 2011
Rank: 1 / 5 (6)
Sep 23, 2011
Rank: not rated yet
http://proj-cngs....undb.htm
Sep 23, 2011
Rank: 4 / 5 (1)
class Neutrinos extends Relativity
{
// insert science here
}
Sep 23, 2011
Rank: 2.5 / 5 (2)
I doubt the universe runs on C# :P
Sep 23, 2011
Rank: 5 / 5 (1)
The authors at CERN are right to be cautious.
You know, neutrinos emitted from far-away supernovas have been measured. Theory suggests that these particles, traveling at a very close fraction of the speed of light, can arrive a few hours before light arrives at Earth(due mainly to light being slowed by matter interactions in the star). If neutrinos were really that much faster than photons, we might have noticed a larger time gap between arrival of neutrinos and arrival of photons. No such gap has been seen.
The safe money is on a measurement error of some sort.
Sep 23, 2011
Rank: 4.7 / 5 (3)
The photon has no mass while the neutrinos have a small mass. Also electrons, protons and neutrons are certainly not massless.
Sep 23, 2011
Rank: 5 / 5 (4)
For the supernova SN1987A the first neutrinos should have arrived about 4 years before the light but most supernovas are much further away. The question is, how would you know that a neutrino event is connected to a supernova if the neutrino event is many years ahead of the light? The neutrinos would probably be filed as coming from an unknown source even if a supernova is later observed in the same area. Now we can look for such early neutrino events but even making such a suggestion would have been outrageous just one day ago.
Sep 23, 2011
Rank: 5 / 5 (2)
That was actually Java in mind, but thankfully it's a fairly universal implementation. Geddit? NM, I'll get my coat... :)
Sep 23, 2011
Rank: 4.3 / 5 (3)
Sep 23, 2011
Rank: 5 / 5 (3)
Tried to do that, too (and I'll be the first to admit that I didn't understand all of it). But significant by six standard deviations? Holy smokes. That's pretty good.
There's a couple of effects which were deemed 'not significant', though, which I'm not sure about. Even though the probability of a stray neutrino (originating from another source) is deemed to be low it should have an effect. Since the timestamp is taken from first effect/occurrence of a neutrino event such 'random' events should skew the result towards the 'fast' side of neutrinos. (but, anyways, at 10E-4 probability for such an event it shouldn't be too much of a skew to explain the results away)
Sep 23, 2011
Rank: 5 / 5 (7)
and what's with the repeated missing of the point that neutrinos do NOT weigh less than photons. several of the comments above could've been avoided if the person had read the above article/comments, or had even a rudimentary idea of what they're talking about.
physics belongs to everyone, but you gotta put some effort in kiddos, else you're just noise.
Sep 23, 2011
Rank: 1.3 / 5 (4)
Sep 23, 2011
Rank: 4 / 5 (4)
How about every contemplates the speed of light barrier surpassed and what it may mean in the future of science. That seems like a useful endeavor.
Sep 23, 2011
Rank: 3 / 5 (2)
Sep 23, 2011
Rank: not rated yet
Sep 23, 2011
Rank: not rated yet
- I like what you did there!
Sep 23, 2011
Rank: 1 / 5 (3)
Sep 23, 2011
Rank: 5 / 5 (5)
Also,
I agree. Most of the questions that people are asking are very obvious questions that have most certainly been considered by the teams analyzing this data. Hence why they reviewed the experiment for months and are now inviting other teams to weigh in their ideas.
Sep 23, 2011
Rank: 5 / 5 (2)
Unlike computers, where the rules change with just about every software and hardware release. I've been working in IT for over 15 years, and I get to the point of pulling hair out trying to keep up with it.
Sep 23, 2011
Rank: not rated yet
Ah.. in other words, could the "speed of light" and "ultimate speed limit" be related to how light travels within the framework of our particular universe? What about "outside" of that universe?
What if what the scientists achieved wasn't "faster than light" motion, but somehow "travel outside of the bounds of our universe's structure". By that I don't mean wormholes and that usual stuff, I mean completely outside of the medium of which our reality is formed.
Like hmm.. in the "stuff" that was there "before" our universe formed on top of it. Sort of uh.. on our particular "brane", before a universe forms on it
Obviously the terms in quotes are placeholders for concepts that I don't have.
Sep 23, 2011
Rank: 5 / 5 (4)
Sep 23, 2011
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Perhaps, then, we should borrow terms from Star Trek until scientists come up with real concepts for them... We could use "subspace" to describe that, and supposedly, their radio transmissions use "subspace" to travel faster than light. For all we know, it could be just like that, a medium through which the speed of light is just much faster than in the "real" universe.
Sep 23, 2011
Rank: 5 / 5 (3)
Hi Skultch, no photon has relativistic mass, just momentum, p. The equation still applies, but it always gives you zero mass for a particle with zero rest mass. The guy is out to lunch.
Sep 23, 2011
Rank: 3 / 5 (2)
http://arxiv.org/...89v3.pdf
But the observation of more distant gamma ray burst didn't exhibited such large delay, so it has been neglected with mainstream physics.
http://arxiv.org/abs/0908.1832
Now the situation just repeats with neutrinos and IMO it could have the same explanation.
http://aetherwave...rsy.html
Sep 23, 2011
Rank: 5 / 5 (5)
Here's a link discussing the mass of a photon (including the old notion "relativistic mass"): http://www.weburb...ass.html
...hope that helps...
Sep 23, 2011
Rank: 5 / 5 (4)
The thing that makes me pause here is the fact that we don't fully understand gravity. So gravitational effects would be estimated, not measured. Like most others I'll wait on making a judgment here...
Sep 23, 2011
Rank: not rated yet
You. Guys. Rock!!!
I think I'm starting to get it now. Gotta let this percolate for a bit....
My wildly ignorant understanding at this moment is that, if true, this experiment might be the beginning to something much more fundamental in physics, and NOT the same as being incomplete or inaccurate.
Garrett Lisi, anyone???
Sep 23, 2011
Rank: 5 / 5 (1)
How can a particle with a non-zero mass (neutrino) have less mass than one with zero mass (photon)?
Sep 23, 2011
Rank: not rated yet
In the unlikely event of the result be true, this would certainly rank alongside the MM experiment, for sure.
Not sure why someone gave you a single star for that.
Sep 23, 2011
Rank: 1 / 5 (3)
Sep 23, 2011
Rank: 1.4 / 5 (10)
they fear that there might be someone more intelligent than they are, therefore,
instead of embracing new findings and help it to grow for all human benefit, they must, in their own piteous way contradict everything and everyone just for self amusement and/or moral status.
very sad.
good luck.
Sep 23, 2011
Rank: not rated yet
Should I wait for this to be independantly verified? He could just be a human projecting his own insecurities.............naaaaahhhhhhhh.
Sep 23, 2011
Rank: not rated yet
Sep 23, 2011
Rank: 5 / 5 (1)
a. 8.3 km fiber optic, including Tx and Rx group delays, has a temperature coefficient of group delay. So was the temperature close enough between when the GD calibration was done and when the particle pulses were measured? This is like 30 us delay, and we want it calibrated to a couple ns.
b. Digitizer latency was removed how? I didn't quite understand that. I know the records are time stamped, but I don't see how the front end latency is removed. I might be confused about how the time stamping is done.
c. What if the proton pulse shape has a good-sized temperature dependency? Because, it's 10 us long, so it's very serious business to realize it may have slowly varying issues which cannot be treated either as statistics or as a fixed single-model parameter.
Sep 23, 2011
Rank: 1 / 5 (1)
Sep 23, 2011
Rank: 5 / 5 (5)
That's a pretty broad brush you're using there. Rational scientists update their beliefs based on the evidence. For a rationalist, if the evidence for a belief is strong, it takes equally strong evidence to begin to change that belief. The principle behind this is known as Bayes' Theorem.
You seem like a pretty intelligent person. If you're interested you might want to take a look at this: http://oscarbonil...theorem/
Sep 24, 2011
Rank: 5 / 5 (2)
Is John Bell getting his wish?
Sep 24, 2011
Rank: 4.2 / 5 (5)
I don't understand what you're saying. Are you saying that this is fringe science? If so, you couldn't be more wrong. This is about as mainstream as it gets. And your use of the word 'indoctrinating' also shows a lack of understanding of how science progresses (see thales comment).
Sep 24, 2011
Rank: 2.3 / 5 (3)
http://arxiv.org/abs/0706.0437
As MINOS co-spokesperson Jenny Thomas told Ars, "the errors were so big we dismissed it." This is exactly what the selective approach in science means. All experimental points, including the most fuzzy ones should be always published. If nothing else, such dispersion points to the reliability of results.
Sep 24, 2011
Rank: 1 / 5 (3)
http://arstechnic...pace.ars
Sep 24, 2011
Rank: 2 / 5 (4)
There's no doubt, the science is evolving in right direction, but sometimes the acceptance is slower than one scientific generation, which implies the Dirac's proposition: "Truth never triumphs its opponents just die out."
Such "progress" apparently works too - but it has nothing to do with rational approach.
Sep 24, 2011
Rank: 1 / 5 (2)
http://www.newsci...red.html
Now we can see, how the evidence of one of postulates of string theory actually violates another postulate, which illustrates clearly, why this theory cannot get the testable predictions.
Sep 24, 2011
Rank: 5 / 5 (3)
There's no need to accept the Copenhagen interpretation of quantum mechanics as there are several competing interpretations.
Sep 24, 2011
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Sep 24, 2011
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Sep 24, 2011
Rank: 4 / 5 (4)
I wonder, could it (paradoxically) be that neutrinos travel faster than light through a medium (the earth)? Would the same results occur in a vacuum?
Sep 24, 2011
Rank: 3 / 5 (2)
Sep 24, 2011
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Sep 25, 2011
Rank: 1 / 5 (1)
1.) Earth orbital velo / speed of light = cca 0.01%
2.) CERN CNGS -> Gran Sasso = 45deg (roughly) rel. to E orbital vector
Which gives: 0.01% * sin(45deg) = ~0.005% c (peak deviation)
Note: Taking the particle path vector into consideration, we need to assume that the majority of measurements were done durring daytime (6am-6pm), else the effect would be opposite (eg. particles would appear to travell slower instead of faster).
So, roughly at 12 o'clock CET time, the effect would be at its peak (0.005% of c), where anything within /- 6hours from 12 o'clock would have a weaker (but still positive) effect.
Now for the sake of simplicity, lets just take the daytime average (which is roughly 1/2 of the peak value of 0.005%)..
Which gives.. (very very roughly) a resulting grand total of ~0.0025% average deviation from c ...
CERN reported deviation: ~0.0025% c
Surprise, surprise? ;-D
Oh well.. just a funny coincidence..
or maybe not?:) [Aether troll bait]
Sep 25, 2011
Rank: 1 / 5 (2)
Sep 25, 2011
Rank: 2.3 / 5 (3)
Good point. Perhaps they didn't take that into account during their months of re-checking their results...
Sep 25, 2011
Rank: 1.4 / 5 (10)
FEW FACTS
US HAS BEEN DOING TIME TRAVEL SINCE THE 60THS
THIS IS CONFIRMATION THAT THIS IS NOT CONSPIRACY THEORY
SEARCH PROJECT PEGASUS Andrew D. Basiago ~ Time Travel & Teleportation
http://www.youtub...Y5RPiiIU
Sep 25, 2011
Rank: 1 / 5 (1)
And how could they test it through the rock??
Sep 25, 2011
Rank: not rated yet
Heh subspace, right.. I guess that could work as a name for what I was trying to describe, something like the brane's own substance before a universe is imprinted on it, assuming one accepts that theory of reality.
Or maybe it's a purely quantum effect, where the particle in question didn't actually travel the distance, but rather appeared to do so when it's wavefunction re-collapsed (after perhaps somehow reforming due to some action in the experiment). In other words, instead of having travelled.. it was in both places already, while it was in a quantumy state
Sep 25, 2011
Rank: 1.7 / 5 (6)
Sep 25, 2011
Rank: not rated yet
neutrinos are supposed to be electrically inert and very weakly interacting.
Once a neutrino is produced (by colliding relevant particles), if it is possible - how is it accelerated(in lab) to higher speeds than the speed at which it starts travelling at its birth?
Sep 25, 2011
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Sep 25, 2011
Rank: 5 / 5 (1)
If we double the distance - what happens? 60 or 120 nanoseconds?
Sep 25, 2011
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Sep 25, 2011
Rank: 5 / 5 (2)
Probably few to none, as he was a theoretician, not an experimentalist. He was given to what he called "thought experiments."
Additionally, his mathematical skills were less than top drawer, such that he frequently relied on others in that regard.
Sep 25, 2011
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Sep 25, 2011
Rank: 5 / 5 (4)
uh, no we haven't. It is not physically possible. More bad news, Elvis is dead.
Sep 25, 2011
Rank: 1 / 5 (1)
Measurement protocol. Have 'safety' and 'liveliness' systems of fault-tolerance redundancy for on board clocks/instrumentation calibration and measurement of the responsible satellite been checked?
Sep 25, 2011
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The equation E=mc2 is not the complete equation; reference an advance physics book.
The error of /-10ns ... it may be /-100ns. The facts will point the way. Await verification; then we can jibber-jabber.
--what if it's hopping through other dimensions, it would fit into the 8th dimension easily... warping space to travel 'x' while never moving faster than light.
Sep 25, 2011
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Sep 26, 2011
Rank: 1 / 5 (1)
The neutrino's were 60 nanoseconds faster ,because they didn't have do anything but go straight forth. Whereas the light had to interact.
Einstein said "that nothing shall go faster than the speed of light"
but he never stated that light cannot be slowed down. Due to a heavy number of highly packed particles in solid state the light had to slow down considerably.
Sep 26, 2011
Rank: 1 / 5 (1)
Once they replicate the experiment at least 2 more times then we can talk about exactly what this means for physics. Now you may return to your useless ranting about who you know the TRUTH.
Sep 26, 2011
Rank: 5 / 5 (3)
Neutrinos do interact with other particles, else they would be undetectable.
As for Einstein, he never said any such thing. Rather, his Velocity-Mass equation says that nothing can be observed exceeding C.
Per said equation, a neutrino's mass increases as it approaches C, while that of a photon, being massless does not, so that the neutrino cannot reach C without attaining infinite mass. If it exceeds C, either it's mass becomes imaginary, or it reverses its direction in time.
Sep 26, 2011
Rank: 5 / 5 (2)
Sep 26, 2011
Rank: 3 / 5 (2)
That is my take on the matter - provided the time difference is real and not an artifact.
Sep 26, 2011
Rank: 4.2 / 5 (5)
They know precisely where the target is, and precisely when the beam hits the target. They know precisely where the target and detectors are. Hence they know the precise time interval between creation and detection.
As to detection they don't track individual particles. They simply produce a whole mess of them and look at the detector for a statistically significant number of them coming from the direction of the source.
Most of the produced neutrino's are never detected. The vast, vast majority.
Sep 26, 2011
Rank: 4.2 / 5 (5)
Unknown. The detector is a large volume of liquid and can't be moved. Building a new detector far away would be costly, but is doable.
Sep 26, 2011
Rank: 5 / 5 (1)
While repeated analysis of the data and methodology can determine the the certitude of the existence of seemingly outlier data points, such cannot ascertain the origin(s) of the neutrinos is question.
Therefore, the null hypothesis is not disproved.
Repeatability is required.
Sep 26, 2011
Rank: 5 / 5 (4)
In the paper it says the the chance for that is less than 1 in 10000.
(They probably did let the detectors run while there was no activity in CERN. That's just standard procedure to get a null reading. )
If you consistently get a higher reading when the CERN apparatus is turned on you can be pretty sure that those events correlate. However with the inability to shield neutrons its not completely impossible that there was a chance neutrino event every time the CERN experiment was up and running - just very, very unlikely.
Sep 26, 2011
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Sep 26, 2011
Rank: 5 / 5 (2)
What does "density" mean in the context of a vacuum?
Sep 26, 2011
Rank: 1 / 5 (1)
Sep 26, 2011
Rank: 2.3 / 5 (3)
Limiting physics has its price. It limits growth potential, which in turn limits sentiment, and colors outlook;
ask all those that think that the deliberate linking of two distributions was a mistake, and they might even contradict themselves and tell you human growth potential is endless.
Well human potential is approaching its apex - The rate of change (for new concepts) may even show negative growth beside the fact that many countries are worried about the debt servicing capacities. i.e. Greece.
The problem with excluding the source has results i.e. they can only analyze two equation --- and the restriction will yield no new physics; at best --> a Gausian distribution.
I'm not going to help enlighten, even though I wrote both the distributions. A consequence not of the method of extraction, but the abuse of the knowledge.
When realization dawns, come and see me, bring your checkbook and a apology.
Nov 18, 2011
Rank: 5 / 5 (1)
I make such absurd statements with the hope of reminding budding scientists to explore "outside the box" even when such pursuits are professionally alienating. Great innovation comes from challenging the assumptions of contemporary science (when not by accident).
Nov 18, 2011
Rank: not rated yet
How can something be tracked to travel faster than the pulse width of the microchip in a measuring apparatus? I'm aware there is an answer to this question (hence the foundation of this article), however, of how/why I am entirely ignorant.
Perhaps by slowing down neutrinos in a substrate as light is slowed in a prism?