2019/07/04 by Damir Bečirević, Becirevic, Damir, Marco Fedele +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.1907.02257
openalex publication_date 2019/07/04 · openalex created_date 2019/07/12 · openalex updated_date 2026/07/28
We discuss the possibility of using the observables deduced from the angular distribution of the B→ D(∗) ℓν decays to test the effects of lepton flavor universality violation (LFUV). We show that the measurement of even a subset of these observables could be very helpful in distinguishing the Lorentz structure of the New Physics contributions to these decays. To do so we use the low energy effective theory in which besides the Standard Model contribution we add all possible Lorentz structures with the couplings (Wilson coefficients) that are determined by matching theory with the measured ratios R(D(∗))exp. We argue that even in the situation in which the measured R(D(∗))exp becomes fully compatible with the Standard Model, one can still have significant New Physics contributions the size of which could be probed by measuring the observables discussed in this paper and comparing them with their Standard Model predictions.