CP violation, B mixing and B lifetime results from the BABAR experiment

TL;DR

This paper reports measurements of CP violation, B meson mixing, and lifetimes using data from the BaBar experiment, providing insights into matter-antimatter asymmetry and B meson properties.

Contribution

First measurement of sin2beta in B decays at BaBar, along with B mixing frequency and lifetime measurements, advancing understanding of CP violation.

Findings

Measured sin2beta = 0.34 +/- 0.20 (stat) +/- 0.05 (syst)

Determined B^0-anti-B^0 oscillation frequency

Measured charged and neutral B meson lifetimes

Abstract

The BaBar detector at the PEP-II asymmetric B Factory at SLAC collected a sample of 23M B-anti-B pairs in the years 1999 and 2000. Using this data sample, we measure the amplitude of the time-dependent CP-violating asymmetry in neutral B decays to the CP eigenstates B0 --> J/psi K0S, B0 --> psi(2S) K0S and B0 --> J/psi K0L. We find a value of sin2beta = 0.34 +/- 0.20 (stat) +/- 0.05 (syst). We also present preliminary measurements of the B^0-anti-B^0 oscillation frequency and of the lifetimes of charged and neutral B mesons.