A Study of B Meson Oscillations Using Hadronic Z^0 Decays Containing Leptons

Simple item page
dc.creatorThe OPAL Collaboration
dc.creatoral, K. Ackerstaff et
dc.date1997-07-03
dc.date.accessioned2026-07-07T11:46:47Z
dc.date.available2026-07-07T11:46:47Z
dc.descriptionAn event sample enriched in semileptonic decays of b hadrons is selected using an inclusive lepton selection from approximately 3.0 million hadronic Z^0 decays collected with the OPAL detector. This sample is used to investigate B meson oscillations by reconstructing a proper decay time for the parent of each lepton, using a jet charge method to estimate the production flavour of this parent, and using the lepton charge to tag the decay flavour. We measure the mass difference between the two B^0_d mass eigenstates Delta(m_d) = 0.444 +/- 0.029 + 0.020 - 0.017 ps^-1. For the B^0_s system, we find Delta(m_s) > 3.1 ps^-1 at the 95% confidence level. This limit varies only a little if alternative limit setting approaches are adopted. Regions at higher Delta(m_s) are also excluded with some methods for setting the limit. By studying the charge symmetry of the B^0_d mixing structure, we are able to constrain possible CP and CPT violating effects. We measure the CP violation parameter Re(epsilon_B) = -0.006 +/- 0.010 +/- 0.006 and the indirect CPT violating parameter Im(delta_B) = -0.020 +/- 0.016 +/- 0.006. If we invoke CPT symmetry, then we obtain Re(epsilon_B) = 0.002 +/- 0.007 +/- 0.003.
dc.description35 pages, LaTeX, 13 eps figures included, submitted to Zeit. f. Physik
dc.identifierhttps://arxiv.org/abs/hep-ex/9707009
dc.identifierhttp://arxiv.org/abs/hep-ex/9707009
dc.identifierZ.Phys.C76:401-415,1997
dc.identifierdoi:10.1007/s002880050564
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/202346
dc.subjectHigh Energy Physics - Experiment
dc.titleA Study of B Meson Oscillations Using Hadronic Z^0 Decays Containing Leptons
dc.typetext

Files

Collections

arXiv