2021/03/31 by Andrei Angelescu, Damir Bečirević, Darius A. Faroughy +2 · 158 citations
Mathematics · Physics and Astronomy · #Algorithm #Black Holes and Theoretical Physics #Computer science #Mathematics #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-lat #hep-ph
paper · pdf · doi:10.1103/physrevd.104.055017
published in Physical review. D/Physical review. D. 104(5) (American Physical Society) · 12 pages, 5 figures (10 plots) [v2: references added, Fig. 3 improved]
openalex created_date 2021/03/29 · arxiv created 2021/04/21 · openalex publication_date 2021/09/14 · arxiv updated 2021/09/22 · openalex updated_date 2026/08/06
We revisit the possibilities of accommodating the experimental indications of the lepton flavor universality violation in b-hadron decays in the minimal scenarios in which the Standard Model is extended by the presence of a single O(1 TeV) leptoquark state. To do so we combine the most recent low energy flavor physics constraints, including R_K(*)exp and R_D(*)exp, and combine them with the bounds on the leptoquark masses and their couplings to quarks and leptons as inferred from the direct searches at the LHC and the studies of the large pT tails of the pp\ensuremath→\ensuremathℓ\ensuremathℓ differential cross section. We find that none of the scalar leptoquarks of mLQ\ensuremath≃1\textdiv2 TeV can accommodate the B-anomalies alone. Only the vector leptoquark, known as U1, can provide a viable solution which, in the minimal setup, provides an interesting prediction, i.e., a lower bound to the lepton flavor violating b\ensuremath→s\ensuremathμ^\ifmmode±\else\textpm\fi\ensuremathτ^\ensuremath∓ decay modes, such as B(B\ensuremath→K\ensuremathμ\ensuremathτ)\ensuremath\gtrsim0.7\ifmmode×\else\texttimes\fi10^\ensuremath-7.