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

G. Hiller·E. O. Iltan
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Abstract

The B_{s} --> ϕψdecay is modeled through the inclusive b --> sψdecay. Using the Vector Meson Dominance model, the amplitude for the chain process B_{s} --> ϕψ--> ϕγ--> γγis 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} --> ϕγis 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} --> γγ)_{SD+LD_{O7}} from inclusive b --> s ψis estimated as less than 1 %.

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G. Hiller, E. O. Iltan. 1997-08-27. Estimate of the long-distance contribution through b --> s ψto the B_{s} --> γγdecay rate. https://doi.org/10.1142/s021773239700296x

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