Z ' mediated flavor changing neutral currents in B meson decays

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We study the effects of an extra U(1)' gauge boson with flavor changing couplings with fermion mass eigenstates on certain B meson decays that are sensitive to such new physics contributions. In particular, we examine to what extent the current data on Bd --> phiK and Bd --> eta'K decays may be explained in such models, concentrating on the example in which the flavor changing couplings are left-chiral. We find that within reasonable ranges of parameters, the Z' contribution can readily account for the anomaly in S-phiKs but is not sufficient to explain large branching ratio of Bd --> eta'K with the same parameter value. S-phiKs and S-eta'Ks are seen to be the dominant observables that constrain the extra weak phase in the model. (C) 2003 Published by Elsevier B.V.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2004-02
Language
English
Article Type
Article
Citation

PHYSICS LETTERS B, v.580, no.3-4, pp.186 - 196

ISSN
0370-2693
DOI
10.1016/j.physletb.2003.11.057
URI
http://hdl.handle.net/10203/226510
Appears in Collection
PH-Journal Papers(저널논문)
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