Z′ mediated flavor changing neutral currents in B meson decays

Vernon Barger; Cheng Wei Chiang; Paul Langacker; Hye Sung Lee

doi:10.1016/j.physletb.2003.11.057

Z′ mediated flavor changing neutral currents in B meson decays

Vernon Barger, Cheng Wei Chiang, Paul Langacker, Hye Sung Lee

Physics

Research output: Contribution to journal › Article › peer-review

124 Scopus citations

Abstract

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 B_d → φK and B_d → η′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_φKS but is not sufficient to explain large branching ratio of B_d → η′K with the same parameter value. S_φKS and S_η′KS are seen to be the dominant observables that constrain the extra weak phase in the model.

Original language	English (US)
Pages (from-to)	186-196
Number of pages	11
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	580
Issue number	3-4
DOIs	https://doi.org/10.1016/j.physletb.2003.11.057
State	Published - Feb 5 2004

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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title = "Z′ mediated flavor changing neutral currents in B meson decays",

abstract = "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 → φK and Bd → η′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 SφKS but is not sufficient to explain large branching ratio of Bd → η′K with the same parameter value. SφKS and Sη′KS are seen to be the dominant observables that constrain the extra weak phase in the model.",

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T1 - Z′ mediated flavor changing neutral currents in B meson decays

AU - Barger, Vernon

AU - Chiang, Cheng Wei

AU - Langacker, Paul

AU - Lee, Hye Sung

PY - 2004/2/5

Y1 - 2004/2/5

N2 - 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 → φK and Bd → η′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 SφKS but is not sufficient to explain large branching ratio of Bd → η′K with the same parameter value. SφKS and Sη′KS are seen to be the dominant observables that constrain the extra weak phase in the model.

AB - 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 → φK and Bd → η′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 SφKS but is not sufficient to explain large branching ratio of Bd → η′K with the same parameter value. SφKS and Sη′KS are seen to be the dominant observables that constrain the extra weak phase in the model.

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JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

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