2023/07/14 by Ya-Ru Kong, Kong, Ya-Ru, Li-Fen Lai +8
Physics and Astronomy · #FOS: Physical sciences #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.2307.07239
openalex publication_date 2023/07/14 · openalex created_date 2023/07/18 · openalex updated_date 2026/07/28
The absence of semitauonic decays of charmed hadrons makes the decay processes mediated by the quark-level c→ d τ+ ντ transition inadequate for probing a generic new physics (NP) with all kinds of Dirac structures. To fill in this gap, we consider in this paper the quasielastic neutrino scattering process ντ+n→ τ-+Λc, and propose searching for NP through the polarizations of the τ lepton and the Λc baryon. In the framework of a general low-energy effective Lagrangian, we perform a comprehensive analysis of the (differential) cross sections and polarization vectors of the process both within the Standard Model and in various NP scenarios, and scrutinize possible NP signals. We also explore the influence on our findings due to the uncertainties and the different parametrizations of the Λc → N transition form factors, and show that they have become one of the major challenges to further constrain possible NP through the quasielastic scattering process.