Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-07-28
Phys.Rev.D78:075017,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
13 pages, 3 figures
Scientific paper
10.1103/PhysRevD.78.075017
In the littlest Higgs model with T-parity (LHT) new flavor-changing interactions between mirror fermions and the Standard Model (SM) fermions can induce various FCNC decays for B-mesons, Z-boson and Higgs boson. Since all these decays induced in the LHT model are correlated, we in this work perform a collective study for these decays, namely the Z-boson decay Z -> b s_bar, the Higgs boson decay h -> b s_bar, and the B-meson decays B -> X_s \gamma, B_s -> \mu^+\mu^- and B -> X_s \mu^+ \mu^-. We find that under the current experimental constraints from the B-decays, the branching ratios of both Z -> b s_bar and h -> b s_bar can still deviate from the SM predictions significantly. In the parameter space allowed by the B-decays, the branching ratio of Z -> b s_bar can be enhanced to 10^{-7} (about one order above the SM prediction) while h -> b s_bar can be much suppressed relative to the SM prediction (about one order below the SM prediction).
Han Xiao-Fang
Wang Lei
Yang Jin Min
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