Z′ mediated flavor changing neutral currents in B meson decays

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

Research output: Contribution to journalArticlepeer-review

133 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)186-196
Number of pages11
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number3-4
StatePublished - Feb 5 2004

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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