A fourth generation, anomalous like-sign dimuon charge asymmetry and the LHC

Physics – High Energy Physics – High Energy Physics - Phenomenology

Scientific paper

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Details

18 pages, 9 figures, Figure 1 is modified, more discussions are added in section 2. new references added

Scientific paper

10.1007/JHEP02(2011)033

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 the anomalous like-sign dimuon charge asymmetry observed recently by the D0 collaboration. The required parameters are found to be consistent with constraints from other $B$ and $K$ decays. The presence of such quarks, apart from being detectable in the early stages of the LHC, would also have important consequences in the electroweak symmetry breaking sector.

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