TY - JOUR
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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U2 - 10.1016/j.physletb.2003.11.057
DO - 10.1016/j.physletb.2003.11.057
M3 - Article
AN - SCOPUS:1042263374
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
SN - 0370-2693
IS - 3-4
ER -