Measurement of B0 and B+ lifetimes and B0-antiB0 mixing with fully reconstructed B decays in BaBar

TL;DR

This paper reports the first measurements of B0 and B+ meson lifetimes and B0-antiB0 mixing using fully reconstructed B decays at the Upsilon(4S) resonance, providing new insights into B meson properties.

Contribution

It introduces the first time-dependent mixing and lifetime measurements of B mesons at Upsilon(4S) energies using the BaBar detector.

Findings

Measured B0 and B+ lifetimes.

Observed B0-antiB0 mixing.

First such measurements at Upsilon(4S) energies.

Abstract

Time-dependent B0-antiB0 flavor oscillations and B0 and B+ lifetimes are studied in a sample of fully reconstructed B mesons collected with the BaBar detector, running at the PEP-II asymmetric e+e- B Factory with center-of-mass energies near the Upsilon(4S) resonance. This is the first time that time-dependent mixing and lifetime measurements have been performed at Upsilon(4S) energies.