2019/03/31 by Ashutosh Kumar Alok, Dinesh Kumar, Suman Kumbhakar +2 · 3 citations
Computer Science · Mathematics · Physics and Astronomy · #Algorithm #Combinatorics #Computational Physics and Python Applications #Mathematics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1016/j.nuclphysb.2020.114957
published as Nucl. Phys. B 953 (2020) 114957 · 6 pages, 2 figures, 4 tables, title changed
arxiv created 2019/12/12 · openalex publication_date 2020/02/12 · arxiv updated 2020/02/17 · openalex created_date 2020/02/24 · openalex updated_date 2026/08/05
Earlier this year, the Belle collaboration presented their new measurements of RD and RD⁎ using a new method. These measurements are consistent with the Standard Model predictions, whereas the global averages of the earlier measurements had a 4.1σ discrepancy. With the inclusion of the new data in the global averages, the discrepancy comes down to 3.1σ. In this work, we study the new physics solutions to the RD-RD⁎ anomaly allowed by the reduction in the discrepancy. Among the four fermion operators, which arise through a single particle exchange, only the (V−A) operator solution survives. We found three additional solutions with two dis-similar operators. The branching ratio of Bc→τν¯ is powerful discriminant between these four allowed solutions.