Improved description of di-lepton production in \(\tau^-\to\nu_\tau P^-\) decays

• Published in: arXiv.org
• Main Authors: Guevara, Adolfo, Gabriel López Castro, Roig, Pablo
• Format: Paper
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 08.03.2022
• Subjects: Broken symmetry; Decay; Evaluation; Flavor (particle physics); Leptons; Mathematical analysis; Pions; Strangeness

Recently, the Belle collaboration reported the first measurements of the \(\tau^- \to\nu_{\tau}\pi^-e^+e^-\) branching fraction and the spectrum of the pion-dielectron system. In an analysis previous to Belle's results, we evaluated this branching fraction which turned out to be compatible with...