Journal article
B* production in Z0 decays
K Ackerstaff, G Alexander, J Allison, N Altekamp, K Ametewee, KJ Anderson, S Anderson, S Arcelli, S Asai, D Axen, G Azuelos, AH Ball, E Barberio, RJ Barlow, R Bartoldus, JR Batley, J Bechtluft, C Beeston, T Behnke, AN Bell Show all
Zeitschrift Fur Physik C Particles and Fields | SPRINGER VERLAG | Published : 1997
Abstract
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 ..
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