Estimate of the long-distance contribution through b --> s ψto the B_{s} --> γγdecay rate

Details Estimate of the long-distance contribution through b --> s ψto the B_{s} --> γγdecay rate Estimate of the long-distance contribution through b --> s ψto the B_{s} --> γγdecay rate

1997-08-27

arxiv.org/abs/hep-ph/9708477v1

Mod.Phys.Lett.A12:2837-2846,1997

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 1 figure (require epsf.sty)

Scientific paper

10.1142/S021773239700296X

The B_{s} --> \phi\psi decay is modeled through the inclusive b --> s\psi 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 \cite{Ruckl}. Both amplitudes are found to agree within 10 %. Further the influence on the branching ratio B(B_{s} --> \gamma\gamma)_{SD+LD_{O7}} from inclusive b --> s \psi is estimated as less than 1 %.

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