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

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133 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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10.1016/j.physletb.2003.11.057

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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.",

author = "Vernon Barger and Chiang, {Cheng Wei} and Paul Langacker and Lee, {Hye Sung}",

note = "Funding Information: C.-W.C. would like to thank A. Kagan, D. Morrissey, J. Rosner, C. Wagner, and L. Wolfenstein for useful discussions and comments. This work was supported in part by the United States Department of Energy under Grants No. EY-76-02-3071 and No. DE-FG02-95ER40896, and in part by the Wisconsin Alumini Research Foundation. ",

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doi = "10.1016/j.physletb.2003.11.057",

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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

N1 - Funding Information: C.-W.C. would like to thank A. Kagan, D. Morrissey, J. Rosner, C. Wagner, and L. Wolfenstein for useful discussions and comments. This work was supported in part by the United States Department of Energy under Grants No. EY-76-02-3071 and No. DE-FG02-95ER40896, and in part by the Wisconsin Alumini Research Foundation.

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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M3 - Article

AN - SCOPUS:1042263374

SN - 0370-2693

VL - 580

SP - 186

EP - 196

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

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

IS - 3-4

ER -

Z′ mediated flavor changing neutral currents in B meson decays

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