B* production in Z0 decays
Collaboration
24 pages
Published in:
- Z.Phys.C 74 (1997) 413-422
PDG: X
Report number:
- CERN-PPE-96-192
Experiments:
View in:
Citations per year
Abstract: (Springer)
The process B*→Bγ has been observed in a sample of approximately 4.1 million hadronic Z0 decays collected by the OPAL detector at LEP in the years 1991–1995. Inclusively reconstructed B mesons have been combined with converted photons to reconstruct approximately 1900 B* mesons. The B*–B mass difference is found to be ΔM(B* −B) = 46.2 ± 0.3 ± 0.8 MeV/c2, and the rate of B* meson production relative to that of B mesons is found to be σB*/σB = 0.760 ± 0.036 ± 0.083, where the first errors are statistical and the second systematic. The angular distribution of the transition photon in the B* rest frame has been measured and the relative contribution of longitudinal B* polarization states found to be σl/(σl + σt) = 0.36 ± 0.06 ± 0.07, consistent with a simple spin counting picture. These results average over B0, B± and Bs0 mesons.- electron positron: colliding beams
- electron positron: annihilation
- Z0: electroproduction
- Z0: hadronic decay
- B*(5320): production
- B*(5320): radiative decay
- mass difference: (B*(5320) B)
- yield: (B*(5320) B)
- photon: angular distribution
- B*(5320): polarization
References(26)
Figures(0)