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Abstract: A fourth chiral generation, with $m {t^\prime}$ in the range $\sim 300 -500$ GeV and a moderate value of the CP-violating phase can explain theanomalous like-sign dimuon charge asymmetry observed recently by the D0collaboration. The required parameters are found to be consistent withconstraints from other $B$ and $K$ decays. The presence of such quarks, apartfrom being detectable in the early stages of the LHC, would also have importantconsequences in the electroweak symmetry breaking sector.



Autor: Debajyoti Choudhury, Dilip Kumar Ghosh

Fuente: https://arxiv.org/







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