B to gamma gamma in an Appelquist-Cheng-Dobrescu model

Bigi, I.I.; Devidze, G.G.; Meissner, U.G.; Liparteliani, A.G

doi:10.1103/PhysRevD.78.097501

Journal Article

PreJuSER-3245

B to gamma gamma in an Appelquist-Cheng-Dobrescu model

Bigi, I. I. ; Devidze, G. G. ; Liparteliani, A. G ; Meissner, U. G.FZJ*

2008
Soc. [S.l.]

Physical review / D 78(9), 097501 (2008) [10.1103/PhysRevD.78.097501]

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Please use a persistent id in citations: http://hdl.handle.net/2128/10463 doi:10.1103/PhysRevD.78.097501

Abstract: We present a full calculation of the amplitudes for B-d[s] -> gamma gamma in a simple Appelquist-Cheng-Dobrescu model that extends an incomplete one in a previous paper. We find cancellations between the contributions from different Kaluza-Klein towers and a small decrease relative to the standard model predictions. It is conjectured that radiative QCD corrections might actually lead to an enhancement in the branching ratios and CP asymmetries, but no more than modest ones.

Keyword(s): B: radiative decay ; B: width ; B: branching ratio ; amplitude analysis: decay ; quantum chromodynamics: radiative correction ; Kaluza-Klein model ; asymmetry: CP ; numerical calculations ; B --> 2photon

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Note: This work was supported by the NSF under Grant No. PHY-0355098 and by Deutsche Forschungsgemeinschaft through funds provided to the SFB/TR 16 "Subnuclear Structure of Matter" and by the EU Contract No. MRTN-CT-2006-035482, FLAVIAnet. This research is part of the EU Integrated Infrastructure Initiative Hadron Physics Project under Contract No. R113-CT-2004-506078. We thank G. Hiller for directing our attention to Ref. [5].

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