51 citations · 102 across the 7 of their papers we have counts for
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Constraints on the Four-Generation Quark Mixing Matrix from a Fit to Flavor-Physics Data
Ashutosh Kumar Alok, Amol Dighe, David London
In the scenario with four quark generations, we perform a fit using flavor-physics data and determine the allowed values -- preferred central values and errors -- of all of the ele…
Neutral Gauge Boson Contributions to the Dimuon Charge Asymmetry in B Decays
Ashutosh Kumar Alok, Seungwon Baek, David London
Recently, the D0 Collaboration measured the CP-violating like-sign dimuon charge asymmetry in neutral B decays, finding a 3.2sigma difference from the standard-model (SM) predictio…
Probing extended Higgs sector through rare b --> s mu+ mu- transitions
Ashutosh Kumar Alok, Amol Dighe, S. Uma Sankar
We study the constraints on the contribution of new physics in the form of scalar/pseudoscalar operators to the average forward backward asymmetry <A_{FB}> of muons in B --> K mu+…
Does the present data on B_s - bar B_s mixing rule out a large enhancement in the branching ratio of B_s --> mu+ mu- ?
Ashutosh Kumar Alok, S. Uma Sankar
In this letter, we consider the constraints imposed by the recent measurement of B_s - bar B_s mixing on the new physics contribution to the rare decay B_s --> mu+ mu-. New physics…
Bounds on Tensor operator contribution to B_s --> l+ l- gamma
Ashutosh Kumar Alok, S. Uma Sankar
We consider the effect of new physics interactions in the form of tensor operators on the branching ratio of B_s --> l+ l- gamma where l=e, mu. We find that the present data on the…
New physics upper bound on the branching ratio of B_s--> l+ l- and B_s--> l+ l- gamma
Ashutosh Kumar Alok, S. Uma Sankar
We consider the most general new physics effective Lagrangian for b--> s l+ l-. We derive the upper limit on the branching ratio for the processes B_s--> l^+ l- where l=e, mu, subj…