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arXiv · 0906.3745

$b \to s$ Transitions in Family-dependent $U(1)^\prime$ Models

Vernon Barger·Lisa L. Everett·Jing Jiang·Paul Langacker·Tao Liu·Carlos E. M. Wagner
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Abstract

We analyze flavor-changing-neutral-current (FCNC) effects in the $b\to s$ transitions that are induced by family non-universal $U(1)'$ gauge symmetries. After systematically developing the necessary formalism, we present a correlated analysis for the $ΔB =1, 2$ processes. We adopt a model-independent approach in which we only require family-universal charges for the first and second generations and small fermion mixing angles. We analyze the constraints on the resulting parameter space from $B_s - \bar B_s$ mixing and the time-dependent CP asymmetries of the penguin-dominated $B_d \to (π, ϕ, η', ρ, ω, f_0)K_S$ decays. Our results indicate that the currently observed discrepancies in some of these modes with respect to the Standard Model predictions can be consistently accommodated within this general class of models.

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Vernon Barger, Lisa L. Everett, Jing Jiang, Paul Langacker, Tao Liu, Carlos E. M. Wagner. 2009-06-19. $b \to s$ Transitions in Family-dependent $U(1)^\prime$ Models. https://doi.org/10.1088/1126-6708/2009/12/048

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