Charged-particle nuclear modification factors in XeXe collisions at $ \sqrt{s_{\mathrm{NN}}} = 5.44 $ TeV - INSPIRE

DataBETA

Charged-particle nuclear modification factors in XeXe collisions at $\sqrt{s_{\mathrm{NN}}} = 5.44$ TeV

CMS

Collaboration

Sep 1, 2018

41 pages

Published in:

JHEP 10 (2018) 138

Published: Oct 22, 2018

e-Print:

1809.00201 [hep-ex]

DOI:

10.1007/JHEP10(2018)138

Report number:

CMS-HIN-18-004,
CERN-EP-2018-228

Experiments:

CERN-LHC-CMS

View in:

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Abstract: (Springer)

The differential yields of charged particles having pseudorapidity within |η| < 1 are measured using xenon-xenon (XeXe) collisions at

\sqrt{s_{\mathrm{NN}}} = 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, p

_{T}

, from 0.5 to 100 GeV. A previously reported p

_{T}

spectrum from proton-proton collisions at

\sqrt{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 p

_{T}

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

\sqrt{s_{\mathrm{NN}}}=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.

Note:

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables, including additional supplementary figures, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIN-18-004 (CMS Public Pages)

Hadron-Hadron scattering (experiments)
Heavy-ion collision
Quark gluon plasma
charged particle: yield
rapidity dependence
charged particle: momentum spectrum
colliding beams: (xenon xenon)
colliding beams: (lead lead)
p p: colliding beams
transverse momentum dependence

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