CP Violation, Mixing and Lifetime Results from BaBar

TL;DR

This paper reports measurements of CP violation parameters, B meson lifetimes, and mixing parameters using 60 million BB̅ pairs from the BaBar experiment, providing insights into matter-antimatter asymmetry.

Contribution

First precise measurements of CP violation parameters and B meson lifetimes from BaBar data at the Upsilon (4S) resonance.

Findings

Measured sin(2beta)=0.75±0.09±0.04

Determined A_Kpi=-0.05±0.06±0.01

Extracted B lifetime and mixing parameters

Abstract

The BaBar collaboration has analysed 60M BB_ pairs collected at the Upsilon (4S) resonance at the PEP II asymetric collider at SLAC. Using this data sample we have measured the CP violation parameters sin (2beta)=0.75+/- 0.09 (STAT) +/-0.04 (SYST) and lambda =0.92+/- 0.06 (STAT) +/- 0.02 (SYST) from B0 to cc_+K*0 + c.c. decays. From charmless 2-body B decays we measure A_Kpi =-0.05 +/- 0.06 +/- 0.01(-0.14,+0.05), S_pipi = -0.01 +/- 0.37 +/- 0.07(-0.66,+0.62), C_pipi =-0.02 +/- 0.29 +/- 0.07(-0.54,+0.48). A number of B lifetime and mixing parameters, extracted from subsamples of this data set, are also presented.