Bounding the B_s -> gamma gamma decay from Higgs mediated FCNC transitions

Abstract

The Higgs mediated flavor violating bottom-strange quarks transitions induced at the one-loop level by a nondiagonal $Hbs$ coupling are studied within the context of an effective Yukawa sector that comprises $S{U}_L(2)\times U_Y(1)$-invariant operators of up to dimension-six. The most recent experimental result on $B\to X_s\gamma$ with hard photons is employed to constraint the $Hbs$ vertex, which is used to estimate the branching ratio for the $B_s\to \gamma \gamma$ decay. It is found that the $B_s\to \gamma \gamma$ decay can reach a branching ratio of the order of $4\times 10^{-8}$, which is 2 orders of magnitude more stringent than the current experimental limit.

9 pages and 5 figures

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• Search for the decay $B^0\to \gamma \gamma$ using Belle and Belle II data
• The Physics of Heavy Flavours at SuperB
• Novel and Updated Bounds on Flavor-Violating Z Interactions in the Quark Sector