B* production in Z0 decays

The OPAL Collaboration

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29 Scopus citations


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*B = 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 Bs 0 mesons.

Original languageEnglish
Pages (from-to)413-422
Number of pages10
JournalZeitschrift fur Physik C-Particles and Fields
Issue number3
StatePublished - 1 Jan 1997
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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