Right-handed current contributions in B -> K pi decays

TL;DR

This paper investigates the effects of right-handed currents in B to K pi decays within nonmanifest left-right models, analyzing their impact on CP asymmetries and constraining new physics parameters using current experimental data.

Contribution

It provides a comprehensive analysis of right-handed current effects in B decays, including all relevant operators and decay amplitudes, with updated constraints from multiple measurements.

Findings

Allowed regions of new physics parameters consistent with experimental data

Significant contributions of right-handed currents to CP asymmetries

Detailed decay amplitude calculations including annihilation effects

Abstract

We reexamine the right-handed current effects in $b \to s$ transitions in nonmanifest left-right models. Using the effective Hamiltonian approach including all possible low-energy operators, we obtain especially the B \to K \pi decay amplitudes including annihilation contributions, and investigate the right-handed current contributions to CP asymmetries in $B \to K \pi$ decays. Taking into account the constraints from global analysis of muon decay measurements, |V_{ub}| measurements in inclusive and exclusive B decays, and $B_s^0-\bar{B_s^0}$ mixing measurements, we find the allowed regions of new physics parameters satisfying the current experimental data.