2006/03/31 by Ashutosh Kumar Alok, S. Uma Sankar
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1142/s0217732307021901
published as Mod.Phys.Lett.A22:1319-1328,2007 · Additional constraints from current data on B-->K^* gamma are considered. Present data on b-->s transitions allow a large boost in B(B_s-->l+ l-) but not in B(B_s-->l+ l- gamma)
arxiv created 2006/05/10 · openalex publication_date 2007/06/14 · arxiv updated 2009/12/01 · openalex created_date 2021/04/13 · openalex updated_date 2026/08/01
We consider the effect of new physics on the branching ratio of B s → l + l - γ where l = e, μ. If the new physics is of the form scalar/pseudoscalar, then it makes no contribution to B s → l + l - γ, unlike in the case of B s → l + l - , where it can potentially make a very large contribution. If the new physics is in the form of vector/axial-vector operators, then the present data on B → (K, K*) l + l - does not allow a large enhancement for B(B s → l + l - γ). If the new physics is in the form of tensor/pseudotensor operators, then the data on B → (K, K*) l + l - gives no useful constraint but the data on B → K* γ does. Here again, a large enhancement of B(B s → l + l - γ), much beyond the Standard Model expectation, is not possible. Hence, we conclude that the present data on b → s transitions allow a large boost in B(B s → l + l - ) but not in B(B s → l + l - γ).