Alleviating the B → D τν and B → D^* τν_τ puzzle in the MSSM

2016/04/12 by D. Boubaa, Boubaa, D., S. Khalil +3 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #Gamma-ray bursts and supernovae #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Radio Astronomy Observations and Technology

paper · pdf · doi:10.48550/arxiv.1604.03416

openalex publication_date 2016/04/12 · openalex created_date 2022/10/01 · openalex updated_date 2026/07/28

Abstract

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

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