May 13 – 19, 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

Observation of the top quark in proton-nucleus collisions with the CMS experiment at the LHC

May 15, 2018, 5:00 PM
2h 40m
First floor and third floor (Palazzo del Casinò)

First floor and third floor

Palazzo del Casinò

Poster Initial state physics and approach to equilibrium Poster Session


Mr Georgios Krintiras (Universite Catholique de Louvain (UCL) (BE))


The first observation of top quark production in proton-nucleus collisions is reported using proton-lead data collected by the CMS experiment at the CERN LHC at a nucleon-nucleon center-of-mass energy of $\sqrt{s_\text{NN}}$ = 8.16 TeV. The measurement is performed using events with exactly one isolated electron or muon candidate and at least four jets. The data sample corresponds to an integrated luminosity of 174 nb$^-1$ .The significance of the $t\bar{t}$ signal against the background-only hypothesis is above five standard deviations. The measured cross section is $\sigma($t\bar{t}$) = 45 \pm 8$ nb, consistent with predictions from perturbative quantum chromodynamics.

Content type Experiment
Collaboration CMS
Centralised submission by Collaboration Presenter name will be specified later

Presentation materials