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Charged-particle nuclear modification factors in XeXe collisions at √sNN = 5.44 TeV

Charged-particle nuclear modification factors in XeXe collisions at √sNN = 5.44 TeV
Charged-particle nuclear modification factors in XeXe collisions at √sNN = 5.44 TeV
The differential yields of charged particles having pseudorapidity within |η| < 1 are measured using xenon-xenon (XeXe) collisions at √sNN = 5.44 TeV. The data, corresponding to an integrated luminosity of 3.42 μb−1, were collected in 2017 by the CMS experiment at the LHC. The yields are reported as functions of collision centrality and transverse momentum, pT, from 0.5 to 100 GeV. A previously reported pT spectrum from proton-proton collisions at √s = 5.02 TeV is used for comparison after correcting for the difference in center-of-mass energy. The nuclear modification factors using this reference, R AA * , are constructed and compared to previous measurements and theoretical predictions. In head-on collisions, the R AA * has a value of 0.17 in the pT range of 6–8 GeV, but increases to approximately 0.7 at 100 GeV. Above ≈6 GeV, the XeXe data show a notably smaller suppression than previous results for lead-lead (PbPb) collisions at √sNN = 5.02 TeV when compared at the same centrality (i.e., the same fraction of total cross section). However, the XeXe suppression is slightly greater than that for PbPb in events having a similar number of participating nucleons.
1029-8479
1-41
Sirunyan, A.M.
846a7137-803d-49de-aae7-d6b85519e829
Tumasyan, A.
6e9fc82d-9104-48e4-8a4d-60f52fdb9ee5
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Sirunyan, A.M.
846a7137-803d-49de-aae7-d6b85519e829
Tumasyan, A.
6e9fc82d-9104-48e4-8a4d-60f52fdb9ee5
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

Sirunyan, A.M. and Tumasyan, A. , The CMS Collaboration (2018) Charged-particle nuclear modification factors in XeXe collisions at √sNN = 5.44 TeV. Journal of High Energy Physics, 2018 (138), 1-41. (doi:10.1007/JHEP10(2018)138).

Record type: Article

Abstract

The differential yields of charged particles having pseudorapidity within |η| < 1 are measured using xenon-xenon (XeXe) collisions at √sNN = 5.44 TeV. The data, corresponding to an integrated luminosity of 3.42 μb−1, were collected in 2017 by the CMS experiment at the LHC. The yields are reported as functions of collision centrality and transverse momentum, pT, from 0.5 to 100 GeV. A previously reported pT spectrum from proton-proton collisions at √s = 5.02 TeV is used for comparison after correcting for the difference in center-of-mass energy. The nuclear modification factors using this reference, R AA * , are constructed and compared to previous measurements and theoretical predictions. In head-on collisions, the R AA * has a value of 0.17 in the pT range of 6–8 GeV, but increases to approximately 0.7 at 100 GeV. Above ≈6 GeV, the XeXe data show a notably smaller suppression than previous results for lead-lead (PbPb) collisions at √sNN = 5.02 TeV when compared at the same centrality (i.e., the same fraction of total cross section). However, the XeXe suppression is slightly greater than that for PbPb in events having a similar number of participating nucleons.

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Sirunyan 2018 Article Charged particle Nuclear Modification - Version of Record
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Accepted/In Press date: 11 October 2018
e-pub ahead of print date: 22 October 2018
Published date: 22 October 2018

Identifiers

Local EPrints ID: 426061
URI: http://eprints.soton.ac.uk/id/eprint/426061
ISSN: 1029-8479
PURE UUID: 1ca2e41f-7fb3-4fb4-94c2-9d6bea4ab6bb
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

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Date deposited: 12 Nov 2018 17:30
Last modified: 07 Oct 2020 01:53

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Contributors

Author: A.M. Sirunyan
Author: A. Tumasyan
Corporate Author: The CMS Collaboration

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