Seeking Answers to the Puzzle of Proton Spin

Thanks to a series of machine upgrades, researchers at the Relativistic Heavy Ion Collider (RHIC), the newest and largest particle accelerator at the U.S. Department of Energy's Brookhaven National Laboratory, are making progress in answering a fundamental question that has long puzzled physicists: Where do protons get their spin, a property of elementary particles as basic as mass and electrical charge?

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<p><a href="http://www.physorg.com/news65116886.html">Seeking Answers to the Puzzle of Proton Spin</a></p> <p>Thanks to a series of machine upgrades, researchers at the Relativistic Heavy Ion Collider (RHIC), the newest and largest particle accelerator at the U.S. Department of Energy's Brookhaven National Laboratory, are making progress in answering a fundamental question that has long puzzled physicists: Where do protons get their spin, a property of elementary particles as basic as mass and electrical charge? <br></p>