Café com Física

Titans clash: top quark meets lead ions

by Pedro Vieira De Castro Ferreira Da Silva (CERN)

Sala de Conferências (Departamento de Física)

Sala de Conferências

Departamento de Física

Universidade de Coimbra

The Run 2 of the LHC opened up the possibility to measure various large-mass elementary particles for the first time in heavy ion collisions, in particular the top quark. The top quark is a novel tool for probing the nuclear parton distribution functions, the mechanisms of parton energy loss, and the medium opacity at different space-time scales. Using pPb and PbPb data, the CMS experiment measured for the first time top quark production in heavy ion collisions. In the talk, a review of these measurements and the acompannying pp reference ones, is given. The focus is put on the recent first observation of top quark pair in PbPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV, using an integrated luminosity of about 1.7/nb.

Organized by

Filipe Veloso e Pedro Costa