Experimental Particle and Astro-Particle Physics Seminar

Monday 15 Feb 2021, 14:00 → 16:00 Europe/Zurich

Stefanos Leontsinis (Universitaet Zuerich (CH))

The multi-TeV energies available at LHC have opened up the possibility to measure, for the first time, various high-mass elementary particles produced in nuclear collisions. However, the two heaviest elementary particles in the standard model remained without direct observation. Whereas the Higgs boson lies beyond the reach of heavy ion collisions at the LHC, the top quark is accessible for experimental study in proton-lead (pPb) and lead-lead (PbPb) collisions. More specifically, the top quark constitutes a novel and theoretically precise probe of the nuclear parton distribution functions, in the poorly explored region where partons have a large fraction of the nucleon momentum, as well as of the properties of the produced quark-gluon plasma. In this talk, we review top quark measurements in pPb and PbPb collisions, and the accompanying proton-proton reference ones, performed by the CMS Collaboration. The focus is put on the recent evidence in PbPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV, using an integrated luminosity of about 1.7/nb
 

Zoom room link

Meeting ID: 912 1383 7955
Passcode: 069577
 

14:00 → 15:00 Top Quarks and the Little Bang Standard Model

Speaker: Dr Georgios Krintiras (The University of Kansas (US))

Seminar_GKK.pdf