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 re...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English English |
| Published: |
Springer Verlag
2018
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/70212/1/70212_Charged-particle%20nuclear%20modification%20factors%20in%20XeXe_article_new.pdf http://irep.iium.edu.my/70212/2/70212_Charged-particle%20nuclear%20modification%20factors%20in%20XeXe_scopus.pdf http://irep.iium.edu.my/70212/13/70212_Charged-particle%20nuclear%20modification%20factors_WOS.pdf http://irep.iium.edu.my/70212/ https://link.springer.com/content/pdf/10.1007%2FJHEP10%282018%29138.pdf |
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| Summary: | 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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