SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 105: Flavor IX

T 105.3: Vortrag

Donnerstag, 23. März 2023, 16:20–16:35, HSZ/0401

Restrictions on scalar leptoquark couplings from charged lepton flavor violation processes — •Uladzimir Khasianevich, Dominik Stöckinger, Hyejung Stöckinger-Kim, and Johannes Wünsche — Institut für Kern- und Teilchenphysik, TU Dresden, Zellescher Weg 19, 01069 Dresden, Germany

We derived the most conservative limits on the S₁ leptoquark model that comes from charged lepton flavour violation observables and magnetic moment of the muon, as they involve a similar diagrammatic structure. We apply the case study, where top-induced, charm-induced or mixed scenarios lead to an explanation of the (g−2)_µ and then further apply additional two- and three- body decay observables to restrict relevant couplings and their products. The µ−e conversion process in Au and Al is used to restrict the first row of couplings. As there are known restrictions from K- and D-meson decays, we incorporate them to further improve the bounds on the relevant coupling entries. The FlexibleSUSY program was used in this work to perform scans over various leptoquark coupling scenarios. We designed appropriate model files incorporating the parameterization of the couplings in the up-type mass diagonal basis. The expressions for the leptonic observables were generated with the help of the NPointFunctions extension of the FlexibleSUSY program.