Measurement of the B0 Lifetime and Oscillation Frequency using B0->D*+l-v decays

TL;DR

This paper reports precise measurements of the B0 meson lifetime and oscillation frequency using decay data from the OPAL detector at LEP, providing key parameters for understanding B meson behavior.

Contribution

The study introduces an inclusive reconstruction technique for D*+ decays and combines multiple tagging methods to measure B0 properties at LEP.

Findings

B0 lifetime measured as 1.541 ps

Oscillation frequency Dm_d found to be 0.497 ps^-1

Results include statistical and systematic uncertainties

Abstract

The lifetime and oscillation frequency of the B0 meson has been measured using B0->D*+l-v decays recorded on the Z0 peak with the OPAL detector at LEP. The D*+ -> D0pi+ decays were reconstructed using an inclusive technique and the production flavour of the B0 mesons was determined using a combination of tags from the rest of the event. The results t_B0 = 1.541 +- 0.028 +- 0.023 ps, Dm_d = 0.497 +- 0.024 +- 0.025 ps-1 were obtained, where in each case the first error is statistical and the second systematic.