Search for new physics from $Btopi phi$

We investigate the pure penguin process $B^-to pi^-phi$ 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 $Bto phi pi$. We have shown that the flavor changing $Z^prime$ models can make the branching ratios of $Bto phi pi$ to saturate the bound under all relevant experimental constraints.