New physics solutions for RD and RD∗

Author:

Alok Ashutosh Kumar,Kumar Dinesh,Kumar Jacky,Kumbhakar Suman,Sankar S. Uma

Abstract

Abstract Recent measurements of R D have reduced tension with the Standard Model prediction. Taking all the present data into account, we obtain the values of the Wilson coefficients of each new physics four-fermion operator of a given Lorentz structure. We find that the combined data rule out most of the solutions based on scalar/pseudoscalar operators. By studying the inter-relations between different solutions, we find that there are only four allowed solutions, which are based on operators with (VA), linear combination of (VA) and (V + A), tensor and linear combination of scalar/pseudoscalar and tensor structure. We demonstrate that the need for new physics is driven by those measurement of R D and R D where the τ lepton is not studied. Further, we show that new physics only in $$ b\to c\ \mu \overline{\nu} $$ b c μ ν ¯ is not compatible with the full set of observables in the decays $$ B\to Dl\overline{\nu} $$ B D l ν ¯ and $$ B\to {D}^{\ast }l\overline{\nu} $$ B D l ν ¯ .

Publisher

Springer Science and Business Media LLC

Subject

Nuclear and High Energy Physics

Reference98 articles.

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