Dalitz-plot analysis of the decays B+/- --> K+/- pi-/+ pi+/-

TL;DR

This paper presents a detailed Dalitz-plot analysis of B+/- decays to K+/- pi-/+ pi+/-, measuring resonant amplitudes, phases, and charge asymmetries with a large data sample, improving upon previous results.

Contribution

It provides the first comprehensive measurement of decay amplitudes and charge asymmetries for these B meson decays using a large BaBar dataset.

Findings

Resonant and nonresonant amplitude measurements

Branching fractions and charge asymmetries consistent with zero

Enhanced precision over previous analyses

Abstract

We report a Dalitz-plot analysis of the charmless hadronic decays of charged B mesons to the final state K+/- pi-/+ pi+/-. Using a sample of 226.0 +/- 2.5 million BBbar pairs collected by the BaBar detector, we measure the magnitudes and phases of the intermediate resonant and nonresonant amplitudes for both charge conjugate decays. We present measurements of the corresponding branching fractions and their charge asymmetries that supersede those of previous BaBar analyses. We find the charge asymmetries to be consistent with zero.