Hadrons can interact through all four fundamental interactions. The dependence of the decay probability on the lepton spin. (eg: electrons, muons and neutrinos) Leptons interact through the weak interaction, the gravitational interaction and through the electromagnetic interaction when charged. An expression is derived for the decay probability under the assumption of a nonzero -neutrino mass. Durante la futura fase di alta luminosità che per l'esperimento LHCb comincerà con il Run5, esso sarà in grado di acquisire una maggiore quantità di dati grazie alla luminosità 10 volte superiore. Leptons are particles and antiparticles that do not interact with the strong interaction. Gli studi di decadimenti molto rari come τ^+→µ^+µ^-µ^+ beneficeranno notevolmente dall'aumento di dati raccolti durante l'attuale Run3 e il prossimo Run4 dal rivelatore recentemente rinnovato. In the Minimal extended Standard Model the branching ratio B(τ^+→µ^+µ^-µ^+) is expected to be O($10^ al 90%(95%) di C.L. The lepton flavour is an accidental symmetry of the Standard Model, and without the oscillations of neutrinos such decay would be prohibited. (muon) lepton decay into three body through the new Z current and the diagram for e. The aim of this work is the search for the decay of the τ lepton into three muons (τ^+→µ^+µ^-µ^+), a decay that would violate the conservation of charged lepton flavour number (cLFV). from publication: Charged lepton mixing processes in 331 Models. Within the CERN LHCb collaboration, I've performed an analysis of data collected during the LHC Run2 (2016, 20). They decay most often to jets of hadrons, and it is in these decays that. The results presented today focus on lepton flavour universality, but the LHCb experiment also studies matter-antimatter differences. These particular W and Z bosons are created in proton-proton collisions at the LHC, and they decay almost immediately. ![]() The physics analysis has been the primary focus of my research activity during the PhD. The experiment is designed to study decays of particles containing a beauty quark, a fundamental particle that has roughly four times the mass of the proton. The tau leptons are however so massive (about 1.8 times heavier than the proton) that they decay before we can measure them directly. And all of these particles decay to lighter ones-decay, decay, decay-until at the end. Leptons are not sensitive to strong interaction. all the leptons, all that adds up to only 4 of the universe. ![]() 07 - Tesi di dottorato Bicocca post 2009 Tau leptons are the heavy siblings of muons and electrons, being respectively 1 times more massive.
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