Is the Vacuum Empty? -- the Higgs Field and the Dark Energy

May 10, 2007

The problems in understanding the true nature of the “vacuum” of space were discussed by theoretical physicist Alvaro de Rújula from CERN (the European Council for Nuclear Research) in Geneva, Switzerland, and a professor of physics at Boston University at the EPL symposium, “Physics In Our Times” held today (10 May) at the Fondation Del Duca de l’Institut de France, Paris.

“As it turns out, the vacuum is not empty - there is a difference between the vacuum and nothingness,” he stated. “Surprisingly, of all known ‘substances’, the vacuum is the least well understood.”

From the point of view of cosmology, the vacuum appears to have an energy density, which is sometimes called “dark energy” or the “cosmological constant”, responsible for the observed accelerated expansion of the universe. From a particle physics viewpoint, the vacuum is permeated by a “Higgs Field” - named after physicist Peter Higgs. In the Standard Model of particle physics (which has mapped the subatomic world with remarkable success for over 30 years), the masses of all particles are generated as a result of their interactions with this field.

It should also be possible to detect excitations of the Higgs field in the form of a particle known as the “Higgs boson”. Detecting the Higgs - the only particle in the Standard Model that has not been observed experimentally - is therefore one of the outstanding challenges in particle physics today. Scientists hope to detect the Higgs using CERN’s Large Hadron Collider (LHC), due to come online in November this year. The LHC will be the world’s largest particle accelerator, colliding protons on protons at a total energy of 16 TeV (16x1012 eV) to generate what physicists hope will be a slew of new particles, including the Higgs.

The LHC will also search for many hypothetical particles other than the Higgs boson in what is called “physics beyond the Standard Model”, with “supersymmetry” being a promising candidate idea. Supersymmetric extensions of the Standard Model predict that all fundamental particles - such as quarks, photons and electrons - have ‘cousins’: their so-called `superpartners’, yet to be discovered.

Dr. de Rújula’s favourite achievement to date, in collaboration with Sheldon Glashow and Howard Georgi, has been understanding the masses of particles made of quarks. “My colleagues Arnon Dar and Shlomo Dado and I also believe we have recently solved the two main problems of high-energy astrophysics, gamma ray bursts and cosmic rays, but astrophysicists do not (yet) agree with this,” explained Dr. de Rújula.

Looking to the future, Dr. de Rújula believes that the LHC will teach us “something fundamental”. Apart from finding the Higgs, it is possible that the collider will produce the “dark matter” particles indirectly observed in the universe. “However, even if the LHC finds nothing this would also be very interesting because it would tell us that we haven’t understood anything about the vacuum. A complete lack of understanding often precedes a scientific revolution” he said.

Source: Institute of Physics


   
Rate this story - 4.3 /5 (27 votes)

Rank Filter

Move the slider to adjust rank threshold, so that you can hide some of the comments.


Display comments: newest first

  • Rohitasch - Jul 26, 2008
    • Rank: not rated yet
    Title: A Unified Model of High-Energy Astrophysical phenomena:
    http://xxx.lanl.g.../0411763
  • HenisDov - Jul 22, 2009
    • Rank: 1 / 5 (1)
    On The Origin Of Origins

    Dark Matter-Energy And %u201CHiggs%u201D?
    Energy-Mass Superposition
    The Fractal Oneness Of The Universe
    All Earth Life Creates and Maintains Genes


    A. On Energy, Mass, Gravity, Galaxies Clusters AND Life, A Commonsensible Recapitulation
    http://www.the-sc...age#2125
    The universe is the archetype of quantum within classical physics, which is the fractal oneness of the universe.

    Astronomically there are two physics. A classical physics behaviour of and between galactic clusters, and a quantum physics behaviour WITHIN the galactic clusters.

    The onset of big-bang's inflation, the cataclysmic resolution of the Original Superposition, started gravity, with formation - BY DISPERSION - of galactic clusters that behave as classical Newtonian bodies and continuously reconvert their original pre-inflation masses back to energy, thus fueling the galactic clusters expansion, and with endless quantum-within-classical intertwined evolutions WITHIN the clusters in attempt to delay-resist this reconversion.


    B. Updated Life's Manifest May 2009
    http://www.physfo...ic=14988&st=480&#entry412704
    http://www.the-sc...age#2321

    All Earth life creates and maintains Genes. Genes, genomes, cellular organisms - All create and maintain genes.

    For Nature, Earth's biosphere is one of the many ways of temporarily constraining an amount of ENERGY within a galaxy within a galactic cluster, for thus avoiding, as long as possible, spending this particularly constrained amount as part of the fuel that maintains the clusters expansion.

    Genes are THE Earth's organisms and ALL other organisms are their temporary take-offs.

    For Nature genes are genes are genes. None are more or less important than the others. Genes and their take-offs, all Earth organisms, are temporary energy packages and the more of them there are the more enhanced is the biosphere, Earth's life, Earth's temporary storage of constrained energy. This is the origin, the archetype, of selected modes of survival.

    The early genes came into being by solar energy and lived a very long period solely on direct solar energy. Metabolic energy, the indirect exploitation of solar energy, evolved at a much later phase in the evolution of Earth's biosphere.

    However, essentially it is indeed so. All Earth life, all organisms, create and maintain the genes. Genes, genomes, cellular organisms - all create and maintain genes.


    Dov Henis
    (Comments from 22nd century)

May 10, 2007 all stories

Comments: 2

4.3 /5 (27 votes)

  • hide
  • Related Stories

  • Physicists Investigate Possibility of an 'Unhiggs'
    created Jan 28, 2010 | popularity not rated yet | comments 0
  • Particle collider: Black hole or crucial machine?
    created Aug 07, 2009 | popularity not rated yet | comments 0
  • Nobel laureate Burton Richter to speak about future of particle physics
    created Feb 16, 2007 | popularity not rated yet | comments 0
  • Physics: Hunting the Penguin During BaBar's Long Run
    created Dec 20, 2005 | popularity not rated yet | comments 0
  • Stacking the deck: Single photons observed at seemingly faster-than-light speeds
    created Jan 26, 2010 | popularity not rated yet | comments 0



  • hide
  • Relevant PhysicsForums posts

  • How to find static friction
    created 3 hours ago
  • Calculating decible increases
    created 10 hours ago
  • Coefficients of friction
    created 11 hours ago
  • Deduction of centripetal force
    created 11 hours ago
  • More from Physics Forums - General Physics

Other News

Extra large carbon

Extra large carbon

Physics / General Physics

created 11 hours ago | popularity 4.6 / 5 (11) | comments 5 | with audio podcast

An exotic form of carbon has been found to have an extra large nucleus, dwarfing even the nuclei of much heavier elements like copper and zinc, in experiments performed in a particle accelerator in Japan. ...


Scientist explore future of high-energy physics

Scientist explore future of high-energy physics

Physics / General Physics

created 17 hours ago | popularity 4.9 / 5 (11) | comments 7 | with audio podcast

In a 1954 speech to the American Physical Society, the University of Chicago's Enrico Fermi fancifully envisioned a particle accelerator that encircled the globe. Such would be the ultimate theoretical outcome, ...


Leaf veins inspire a new model for distribution networks (w/ Video)

Physics / General Physics

created 14 hours ago | popularity 5 / 5 (3) | comments 0 | with audio podcast

(PhysOrg.com) -- Following the straight and narrow may be good moral advice, but it’s not a great design principle for a distribution network. In new research, a team of biophysicists describe a complex netting of interconnected ...


New magnetic tuning method enhances data storage

New magnetic tuning method enhances data storage

Physics / General Physics

created 17 hours ago | popularity 4.5 / 5 (4) | comments 0 | with audio podcast

Researchers in Chicago and London have developed a method for controlling the properties of magnets that could be used to improve the storage capacity of next-generation computer hard drives.


High-performance microring resonator developed by INRS researchers

Physics / Optics & Photonics

created 9 hours ago | popularity 1 / 5 (1) | comments 0

A new, more efficient low-cost microring resonator for high speed telecommunications systems has been developed and tested by Professor Roberto Morandotti's INRS team in collaboration with Canadian, American, and Australian ...