2019/04/30 by Debjyoti Bardhan, Diptimoy Ghosh
Mathematics · Physics and Astronomy · #Bar (unit) #Geometry #High-Energy Particle Collisions Research #Mathematical analysis #Mathematics #Meson #Neutrino #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Sigma #Tensor (intrinsic definition) #Upper and lower bounds #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.100.011701
published as Phys. Rev. D 100, 011701 (2019) · Version to be published in Phys. Rev. D, Rapid Communications
openalex created_date 2019/05/03 · arxiv created 2019/06/17 · openalex publication_date 2019/07/10 · arxiv updated 2019/07/17 · openalex updated_date 2026/08/05
In this paper, we discuss the impact of the recent Belle result on the various theoretical explanations of the RD and R_D* anomalies. The pure tensor explanation, which was strongly disfavored by the measurements of FL^D* and high-pT pp\ensuremath→\ensuremathτ\ensuremathν searches before Moriond, is now completely allowed because of the reduction of the experimental world average. Moreover, the pure right-chiral vector solution (involving right-chiral neutrinos) has now moved into the 2\ensuremathσ allowed range of the LHC pp\ensuremath→\ensuremathτ\ensuremathν searches. We also critically reexamine the bound on B(Bc^\ensuremath-\ensuremath→\ensuremathτ^\ensuremath-\ensuremathν_\ensuremathτ) from large electron-positron collider data and show that the bound is considerably weaker than the number 10% often used in the recent literature.