Measurement of Charge Asymmetries in Charmless Hadronic B Decay

TL;DR

This study measures charge asymmetries in five charmless hadronic B meson decays to search for CP violation, finding no significant asymmetries but setting strong limits that challenge some theoretical predictions.

Contribution

First comprehensive measurement of CP asymmetries in these specific B decay modes using large CLEO datasets, providing constraints on theoretical models.

Findings

No significant CP asymmetry observed in any mode

Precision of measurements varies from ±0.12 to ±0.25

Results exclude some theoretical estimates of asymmetry

Abstract

We search for CP violating asymmetries in five charmless hadronic B meson decays using the full CLEO II and CLEO II.V data samples totalling 9.7 million BBbar events. The resulting Acp measurements have a precision that varies from +-0.12 to +-0.25 (absolute) depending on mode. No significant nonzero asymmetry is observed in any mode but 90% CL limits are strong and rule out some estimates of Acp.