Heidelberg 2022 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

T: Fachverband Teilchenphysik

T 10: Search for New Particles -1

T 10.5: Vortrag

Montag, 21. März 2022, 17:15–17:30, T-H23

A search for pair production of excited top quarks t* at CMS — •Finn Labe¹, Johannes Haller¹, Roman Kogler², Artur Lobanov¹, and Matthias Schröder¹ — ¹Institut für Experimentalphysik, Universität Hamburg — ²DESY

A search for pair production of excited top quarks t^* in the decay channel t^* t^* → t g t g is presented. The search uses proton-proton collision data at a center-of-mass energy of 13 TeV, collected with the CMS experiment during Run 2 of the LHC, corresponding to a total integrated luminosity of 137 fb⁻¹. The analysis is performed in the lepton+jets final state, where the fully hadronic decay of the highly boosted top quark is identified with top tagging techniques. For discrimination of signal from background, a deep neural network is used, which is decorrelated from the sum of all object momenta S_T using a "designing decorrelated taggers" (DDT) approach. Distributions of signal and background events of S_T are used to evaluate the expected sensitivity of the search, which yields promising results over the full mass range analyzed.