Search for new physics from $B\to \pi \varphi$

Abstract

We investigate the pure penguin process $B^{-}\to {\pi }^{-}\varphi$ using QCD factorization approach to calculate hadronic matrix elements to the ${\alpha }_s$ order in some well-known NP models. It is shown that the NP contributions in R-parity conserved SUSY models and 2HDMs are not enough to saturate the experimental upper bounds for $B\to \varphi \pi$. We have shown that the flavor changing $Z^{\prime }$ models can make the branching ratios of $B\to \varphi \pi$ to saturate the bound under all relevant experimental constraints.

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