Sirunyan, AM;
Tumasyan, A;
Adam, W;
Ambrogi, F;
Bergauer, T;
Brandstetter, J;
Dragicevic, M;
... Carvalho, W; + view all
(2020)
Running of the top quark mass from proton-proton collisions at \sqrt{s} = 13 TeV.
Physics Letters B
, 803
, Article 135263. 10.1016/j.physletb.2020.135263.
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Abstract
The running of the top quark mass is experimentally investigated for the first time. The mass of the top quark in the modified minimal subtraction \bar{MS} renormalization scheme is extracted from a comparison of the differential top quark-antiquark (t\bar{t}) cross section as a function of the invariant mass of the (t\bar{t}) system to next-to-leading-order theoretical predictions. The differential cross section is determined at the parton level by means of a maximum-likelihood fit to distributions of final-state observables. The analysis is performed using (t\bar{t}) candidate events in the e^{±} μ^{∓} channel in proton-proton collision data at a centre-of-mass energy of 13 TeV recorded by the CMS detector at the CERN LHC in 2016, corresponding to an integrated luminosity of 35.9 fb^{-1}. The extracted running is found to be compatible with the scale dependence predicted by the corresponding renormalization group equation. In this analysis, the running is probed up to a scale of the order of 1 TeV.
| Type: | Article |
|---|---|
| Title: | Running of the top quark mass from proton-proton collisions at \sqrt{s} = 13 TeV |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.physletb.2020.135263 |
| Publisher version: | https://doi.org/10.1016/j.physletb.2020.135263 |
| Language: | English |
| Additional information: | © 2020 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
| Keywords: | CMS, Physics, Top quark mass, QCD, Renormalization |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10097473 |
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