Resolving R_D and R_D^* Anomalies in Adjoint SU(5)

2023/01/05 by A. Ismael, Ismael, A., S. Khalil +1
Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2301.02226

openalex publication_date 2023/01/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We investigate the R_D and R_D^* anomalies in the context of non-minimal SU(5), where Higgs sector is extended by adjoint 45-dimensional multiplet. One of the light spectrum of this model could be the scalar triplet leptoquark that is contained in this multiplet. We demonstrate that this particular scalar leptoquark mediation of the transition b → c τν is capable of simultaneously accounting for both R_D and R_D^* anomalies. We further emphasize that another Yukawa coupling controls its contribution to b → s ℓ⁺ ℓ^-, ensuring that R_K and R_K^* remain consistent with the standard model predictions.

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