$Z^\\prime$ mediated flavor changing neutral currents in $B$ meson decays
Journal
Physics Letters
Journal Volume
B580
Pages
186-196
Date Issued
2003-10
Author(s)
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. © 2003 Published by Elsevier B.V.
SDGs
Type
journal article