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baryon |
Also found in: Encyclopedia, Wikipedia, Hutchinson | 0.03 sec. |
baryon [bar-ree-on] Noun an elementary particle that has a mass greater than or equal to that of the proton [Greek barus heavy]
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It calls for still heftier baryons that haven't yet been found. The isotopic ratios measured in extragalactic gas clouds can be compared to Big Bang Nucleosynthesis calculations in order to place limits on the ratio of baryons to photons in the early universe. However, the CP-violation found in kaon decays, and incorporated into the Standard Model (SM) via the quark mixing mechanism, is too weak to explain the excess of baryons over antibaryons. |
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