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

Alleviating the B i → D τ ν τ and B i → D a - τ ν τ puzzle in the MSSM
Alleviating the B i → D τ ν τ and B i → D a - τ ν τ puzzle in the MSSM
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.
0217-751X
Boubaa, Dris
ac09ce4b-a5ab-4509-adf8-839f0ff05492
Khalil, Shaaban
2320836f-4666-474a-9aa4-bdfe6eb086b7
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Boubaa, Dris
ac09ce4b-a5ab-4509-adf8-839f0ff05492
Khalil, Shaaban
2320836f-4666-474a-9aa4-bdfe6eb086b7
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614

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
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Accepted/In Press date: 5 November 2019
e-pub ahead of print date: 10 December 2019

Identifiers

Local EPrints ID: 437232
URI: http://eprints.soton.ac.uk/id/eprint/437232
ISSN: 0217-751X
PURE UUID: f90fac33-cd89-4f38-8af5-528695215686

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Date deposited: 22 Jan 2020 17:32
Last modified: 10 Dec 2020 05:01

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