Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of Service and Privacy Policy. As atoms and subatomic particles swirl and crash into each other ...
X marks the spot: the CMS experiment at CERN undergoing an upgrade. (Courtesy: Maximilien Brice/CERN) A mysterious “X” particle comprising four quarks and first seen in 2003, has been found in the ...
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