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arXiv · 0805.0354

Probing extended Higgs sector through rare b --> s mu+ mu- transitions

Ashutosh Kumar Alok·Amol Dighe·S. Uma Sankar
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Abstract

We study the constraints on the contribution of new physics in the form of scalar/pseudoscalar operators to the average forward backward asymmetry of muons in B --> K mu+ mu- and the longitudinal polarization asymmetry A_{LP} of muons in B_s --> mu+ mu-. We find that the maximum possible value of allowed by the present upper bound on B(B_s --> mu+ mu-) is about 1% at 95% C.L. and hence will be very difficult to measure. On the other hand, the present bound on B(B_s --> mu+ mu-) fails to put any constraints on A_{LP}, which can be as high as 100% even if B(B_s --> mu+ mu-) is close to its standard model prediction. The measurement of A_{LP} will be a direct evidence for an extended Higgs sector, and combined with the branching ratio B(B_s --> mu+ mu-) it can even separate the new physics scalar and pseudoscalar contributions.

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Ashutosh Kumar Alok, Amol Dighe, S. Uma Sankar. 2008-05-03. Probing extended Higgs sector through rare b --> s mu+ mu- transitions. https://doi.org/10.1103/physrevd.78.034020

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