Leading logarithmic QCD corrections to the B-s ->gamma gamma decays in the two-Higgs doublet model

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1998-03-30

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Alıyev, Tahmasıb
Iltan, EO

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We calculate the leading logarithmic QCD corrections to the decay B-s --> gamma gamma in the two-Higgs doublet model (2HDM) including O-7-type long-distance effects and estimate the restrictions of the 2HDM parameters, tan beta and m(H), using the experimental data of B --> X-s gamma decay provided by the CLEO Collaboration. A lower bound for the charged Higgs mass m(H) as a function of the renormalization scale mu is given for 2HDM model II. We further present the dependencies of the branching ratio Br(B-s --> gamma gamma) and the ratio \A(+)\(2)/\A(-)\(2) on m(H) and tan beta including leading logarithmic QCD corrections. The dependence on the renormalization scale is found to be strong for both ratios. An additional uncertainty arises from the variation of the parameters of the bound state model, (m(b),<(Lambda)over bar>(s)). We see that to look for charged Higgs effects the measurement of the branching ratio Br(B-s --> gamma gamma) is promising. (C) 1998 Elsevier Science B.V.

Subject Keywords

Two-Higgs doublet model, B-mesons, Quantum chromodynamics, Rare decays, Leading logarithmic corrections, Effective Hamiltonian

URI

https://hdl.handle.net/11511/40973

Journal

NUCLEAR PHYSICS B

DOI

https://doi.org/10.1016/s0550-3213(98)00018-2

Collections

Department of Physics, Article

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Citation Formats

T. Alıyev and E. Iltan, “Leading logarithmic QCD corrections to the B-s ->gamma gamma decays in the two-Higgs doublet model,” NUCLEAR PHYSICS B, pp. 321–341, 1998, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/40973.