On the perturbative approach to the penguin-induced B -> pi phi decay

TL;DR

This paper applies a modified perturbative approach with Sudakov resummation to analyze the B -> pi phi decay, highlighting electroweak penguin dominance and a larger predicted CP asymmetry compared to traditional methods.

Contribution

It introduces a perturbative method including nonfactorizable contributions and transverse degrees of freedom for B decays, providing new insights into CP asymmetry predictions.

Findings

Supports electroweak penguin dominance in B -> pi phi decay

Predicts a branching ratio of order 10^{-8}

Estimates a CP asymmetry of 16%, larger than previous models

Abstract

Using a modified perturbative approach that includes the Sudakov resummation and transverse degrees of freedom we analyze the penguin-induced B -> pi phi decay. The perturbative method enables us to include nonfactorizable contributions and to control virtual momenta appearing in the process. The calculation supports the results obtained in the standard BSW factorization approach, illustrating the electroweak penguin dominance and the branching ratio of order O(10^{-8}). However, the estimated prediction of 16% for CP asymmetry is much larger than that obtained in the factorization approach.