ar X iv : h ep - p h / 02 09 22 7 v 1 1 9 Se p 20 02 hep - ph / 0209227 KA – TP – 11 – 2002 ELECTROWEAK BARYON NUMBER
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چکیده
How realistic are these requirements? Well, noninvariance under the charge conjugation transformation (C) and the combined charge conjugation and parity reflection transformation (CP) have been observed in the laboratory. Also, thermal nonequilibrium can perhaps be expected for certain (brief) epochs in the history of the early universe, as described by the Hot Big Bang Model. But baryon number violation (i.e., ∆B ≡ B(tout) − B(tin) 6= 0) has never been seen experimentally! Strictly speaking, we know of only one physical theory that is expected to have baryon number violation: the electroweak Standard Model. The problem is, however, that the relevant physical processes of the electroweak Standard Model are only known at low temperatures,
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تاریخ انتشار 2002