Estimate of the long-distance contribution through b -> s psi to the B-s ->gamma gamma decay rate

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Hiller G., Iltan E.

MODERN PHYSICS LETTERS A, vol.12, no.37, pp.2837-2846, 1997 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 12 Issue: 37
  • Publication Date: 1997
  • Doi Number: 10.1142/s021773239700296x
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.2837-2846


The B-s --> phi psi decay is modeled through the inclusive b --> s phi decay. Using the vector meson dominance model, the amplitude for the chain process B-s --> phi psi --> phi gamma --> gamma gamma is estimated and it is found to be at most 4% of the corresponding amplitude from the O-7 type LD contribution. The intermediate amplitude for the process B-s --> phi gamma is compared with the corresponding one obtained by a different approach based on the interaction of the virtual charm quark loop with soft, gluons.(7) Both amplitudes are found to agree within 10%. Further the influence on the branching ratio B(B-s --> gamma gamma)(SD+LDO7) from inclusive b --> s psi is estimated to be less than 1%.