| 单词 | proton decay |
| 释义 | proton decay A process of the type p → e+ + π0 where a proton decays into a positron and a pion, predicted to occur in grand unified theories (GUTs) because baryon number is no longer conserved. The lifetime depends on the theory used and is typically 1035 years, but a combination of GUTs and supersymmetry gives a lifetime of about 1045 years. Considerable experimental effort has been spent in looking for proton decay, so far with no success |
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