Measurement of the Charge Asymmetry in $B\to K^* (892)^{\pm}\pi^{\mp}$

TL;DR

This paper reports a search for CP violation in the decay B -> K*(892)+- pi-+ using data from the CLEO detector, finding no significant asymmetry within the experimental uncertainties.

Contribution

First measurement of CP asymmetry in B -> K*(892)+- pi-+ decay with a detailed analysis of the asymmetry and its confidence interval.

Findings

Measured asymmetry A_CP = 0.26 with large uncertainties

Allowed asymmetry interval at 90% confidence level: [-0.31, 0.78]

No significant CP violation observed in this decay mode

Abstract

We report on a search for a CP-violating asymmetry in the charmless hadronic decay B -> K*(892)+- pi-+, using 9.12 fb^-1 of integrated luminosity produced at \sqrt{s}=10.58 GeV and collected with the CLEO detector. We find A_{CP}(B -> K*(892)+- pi-+) = 0.26+0.33-0.34(stat.)+0.10-0.08(syst.), giving an allowed interval of [-0.31,0.78] at the 90% confidence level.