$B \to γγ$ in an ACD model

Details $B \to γγ$ in an ACD model $B \to γγ$ in an ACD model

2008-06-09

arxiv.org/abs/0806.1541v1

Phys.Rev.D78:097501,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, 2 figures

Scientific paper

10.1103/PhysRevD.78.097501

We present a full calculation of the amplitudes for $B_{d[s]} \to \gamma \gamma$ in a simple ACD model that extends an incomplete one in a previous paper. We find cancellations between the contributions from different KK towers and a small decrease relative to the SM predictions. It is conjectured that radiative QCD corrections might actually lead to an enhancement in the branching ratios and {\bf CP} asymmetries, but no more than modest ones.

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