Scalar interactions and the polarizations of $B\to \varphi K^{\ast }$

Abstract

We try to understand the polarization puzzle in $B\to \varphi K^{\ast }$ decays with a simple Higgs model associated with flavor changing neutral current at tree level. The new interactions can effectively reduce the longitudinal polarization $|A_0{|}^2$. In particular, we find that if the couplings of $b$-quark in different chiralities to Higgs are the same, the transverse polarization $|A_{\perp }{|}^2$ can receive the largest contribution and its value can be as large as 30%. On the other hand, with opposite sign in the couplings, the other transverse polarization $|A_{\parallel }{|}^2$ is enhanced.

arXiv comment12 pages, 2 figures, Revtex4, relative phases added and typos corrected, version to appear in Phys. Rev. D

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