Abstract:
Since the Standard Model most probably cannot explain the large value of
CP asymmetries recently observed in $D$-meson decays we propose the
fourth quark-lepton generation explanation of it. As a byproduct weakly
mixed leptons of the fourth generation make it possible to save the baryon number of
the Universe from erasure by sphalerons. An impact of the 4th generation on
BBN is briefly discussed.
Fulltext:
PDF file (303 kB)