An Updated Study of B Meson Oscillations using Dilepton Events
High Energy Physics - Experiment
2008-11-26 v1
Abstract
This paper reports a study of B meson oscillations using hadronic Z^0 decays with two identified leptons, and updates a previous publication by including data collected in 1994. Decay times are reconstructed for each of the semileptonic B decays by forming vertices which include the lepton and by estimating the B meson momentum. The mass difference, Delta(m_d), between the two mass eigenstates in the B^0_d system is measured to be 0.430 +/- 0.043 + 0.028 - 0.030 ps^-1, where the first error is statistical and the second error is systematic. For the B^0_s system, a lower limit of Delta(m_s) > 2.2 ps^-1 is obtained at 95% C.L.
Cite
@article{arxiv.hep-ex/9707010,
title = {An Updated Study of B Meson Oscillations using Dilepton Events},
author = {The OPAL Collaboration and K. Ackerstaff et al},
journal= {arXiv preprint arXiv:hep-ex/9707010},
year = {2008}
}
Comments
18 pages, LaTeX, 5 eps figures included, submitted to Zeit. f. Physik