Measurement of the Ratio of B+ and B0 Meson Lifetimes

TL;DR

This paper reports a precise measurement of the ratio of B+ to B0 meson lifetimes using data from the Fermilab Tevatron Collider, providing insights into heavy meson decay properties.

Contribution

The study presents the first measurement of the B+ to B0 meson lifetime ratio using data from the D0 experiment with specific decay channels, improving precision over previous estimates.

Findings

Measured lifetime ratio t+/t0 = 1.080 ± 0.016 (stat) ± 0.014 (syst)

Used decay channels dominated by B+ and B0 mesons

Provides a more accurate value for meson lifetime ratio

Abstract

The ratio of B+ and B0 meson lifetimes was measured using data collected in 2002-2004 by the D0 experiment in Run II of the Fermilab Tevatron Collider. These mesons were reconstructed in B -> mu+ nu D*- X decays, which are dominated by B0, and B ->mu+ nu D0bar X decays, which are dominated by B+. The ratio of lifetimes is measured to be t+/t0 = 1.080 +- 0.016(stat) +- 0.014(syst).