b → s transitions in family-dependent U(1)' models

doi:10.1088/1126-6708/2009/12/048

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Large Vernon Barger et al JHEP12(2009)048 doi:10.1088/1126-6708/2009/12/048

b → s transitions in family-dependent U(1)' models

Large Vernon Barger^a, Lisa L. Everett^a, Jing Jiang^a, Paul Langacker^b, Tao Liu^c and Carlos E.M. Wagner^c,d,e

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barger@pheno.wisc.edu leverett@wisc.edu jiangj07@gmail.com pgl@ias.edu taoliu@theory.uchicago.edu cwagner@hep.anl.gov

^a Department of Physics, Universityof Wisconsin, 1150 University Avenue, Madison, WI 53706, U.S.A.
^b School of Natural Science, Institute for Advanced Study, Einstein Drive, NJ 08540, Princeton U.S.A.
^c Enrico Fermi Institute, University of Chicago, 5640 S. Ellis Ave., IL 60637, Chicago U.S.A.
^d Kavli Institute for Cosmological Physics, University of Chicago, 5640 S. Ellis Ave., IL 60637, Chicago U.S.A.
^e HEP Division, Argonne National Laboratory, 9700 Cass Ave., IL 60439, Argonne U.S.A.

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Abstract References Cited By

We analyze flavor-changing-neutral-current (FCNC) effects in the b → 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 → (π, phi

,η',ρ,ω,f₀)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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