Heidelberg 2022 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
T: Fachverband Teilchenphysik
T 37: Search for New Particles 2
T 37.2: Vortrag
Dienstag, 22. März 2022, 16:30–16:45, T-H22
Search for excited leptons in the contact interaction and Z decay channels with CMS — •Fabian Nowotny, Thomas Hebbeker, and Kerstin Hoepfner — III. Physikalisches Institut A, RWTH Aachen
The Standard Model of particle physics does not provide a comprehensive explanation for the observed hierarchy of three generations of fermions, for both leptons and quarks. A possible explanation is delivered by models postulating that quarks and leptons themselves are composite objects. Their constituents are bound by an asymptotically free gauge interaction below a characteristic scale Λ. Such models of compositeness predict the existence of excited lepton (l⋆) and excited quark (q⋆) states at the characteristic scale Λ of the new binding interaction. The theory allows the production of excited leptons via contact interactions in conjunction with a Standard Model lepton. Furthermore, the leptons can decay into several final states.
This talk focuses on the contact interaction and Z-boson decay channels, both resulting in l⋆→ l q q transitions where l represents e and µ. Preliminary results are presented on the 2018 proton-proton dataset corresponding to a luminosity of 59.8 fb−1 at a center of mass energy of √s = 13 TeV.