Charged-particle nuclear modification factors in XeXe collisions at $$ \sqrt{s_{\mathrm{NN}}} = 5.44 $$ TeV
Here, 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, 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 $$ \sqrt{s_{\mathrm{NN}}} = 5.02 $$ 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.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); University of Illinois, Chicago, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Nuclear Physics (NP)
- Contributing Organization:
- The CMS collaboration
- Grant/Contract Number:
- AC02-07CH11359; FG02-94ER40865
- OSTI ID:
- 1475052
- Alternate ID(s):
- OSTI ID: 1665942
- Report Number(s):
- FERMILAB-PUB-18-526-CMS; arXiv:1809.00201; CMS-HIN-18-004; CERN-EP-2018-228; DOE-UIC-ER40865-X9; 1692558
- Journal Information:
- Journal of High Energy Physics (Online), Vol. 2018, Issue 10; ISSN 1029-8479
- Publisher:
- Springer BerlinCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Cross sections for 2-to-3 meson-meson scattering
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journal | January 2020 |
Cross sections for 2-to-3 meson-meson scattering | text | January 2019 |
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