Alleviating the B i → D τ ν τ and B i → D a - τ ν τ puzzle in the MSSM

Boubaa, Dris, Khalil, Shaaban and Moretti, Stefano (2019) Alleviating the B i → D τ ν τ and B i → D a - τ ν τ puzzle in the MSSM. International Journal of Modern Physics A, 34 (32), [1950209]. (doi:10.1142/S0217751X19502099).

Record type: Article

Abstract

We show that Supersymmetric effects driven by penguin contributions to the b→cτντ transition are able to account simultaneously for a sizeable increase of both branching ratios of B̄ →Dτν̄ τ and B̄ →D∗τν̄ τ with respect to the Standard Model predictions, thereby approaching their experimentally measured values. We emphasize that a light chargino and neutralino, with masses less than 300 GeV, in addition to a large stau/sneutrino mass and a large tanβ, are essential for enhancing the effect of the lepton penguin τντW±, which is responsible for the improved theoretical predictions with respect to current data.

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Alleviating the B i → D τ ν τ and B i → D a - τ ν τ puzzle in the MSSM - Accepted Manuscript

Available under License University of Southampton Accepted Manuscript Licence.

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