Aaboud, M;
Aad, G;
Abbott, B;
Abdinov, O;
Abeloos, B;
Abhayasinghe, DK;
Abidi, SH;
... Zwalinski, L; + view all
(2018)
Measurement of the suppression and azimuthal anisotropy of muons from heavy-flavor decays in Pb plus Pb collisions at root s(NN)=2.76 TeV with the ATLAS detector.
Physical Review C
, 98
(4)
, Article 044905. 10.1103/PhysRevC.98.044905.
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Abstract
ATLAS measurements of the production of muons from heavy-flavor decays in √ s N N = 2.76 TeV Pb+Pb collisions and √ s = 2.76 TeV p p collisions at the LHC are presented. Integrated luminosities of 0.14 nb − 1 and 570 nb − 1 are used for the Pb+Pb and p p measurements, respectively, which are performed over the muon transverse momentum range 4 < p T < 14 GeV and for five Pb+Pb centrality intervals. Backgrounds arising from in-flight pion and kaon decays, hadronic showers, and misreconstructed muons are statistically removed using a template-fitting procedure. The heavy-flavor muon differential cross sections and per-event yields are measured in p p and Pb+Pb collisions, respectively. The nuclear modification factor R A A obtained from these is observed to be independent of p T , within uncertainties, and to be less than unity, which indicates suppressed production of heavy-flavor muons in Pb+Pb collisions. For the 10% most central Pb+Pb events, the measured R A A is approximately 0.35. The azimuthal modulation of the heavy-flavor muon yields is also measured and the associated Fourier coefficients v n for n = 2 , 3, and 4 are given as a function of p T and centrality. They vary slowly with p T and show a systematic variation with centrality which is characteristic of other anisotropy measurements, such as that observed for inclusive hadrons. The measured R A A and v n values are also compared with theoretical calculations.
| Type: | Article |
|---|---|
| Title: | Measurement of the suppression and azimuthal anisotropy of muons from heavy-flavor decays in Pb plus Pb collisions at root s(NN)=2.76 TeV with the ATLAS detector |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevC.98.044905 |
| Publisher version: | http://doi.org/10.1103/PhysRevC.98.044905 |
| Language: | English |
| Additional information: | Copyright © 2018 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license |
| 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 UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10061091 |
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