Bibcode
Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M.; Friedl, M.; Frühwirth, R.; Ghete, V. M.; Hartl, C.; Hörmann, N.; Hrubec, J.; Jeitler, M.; König, A.; Krätschmer, I.; Liko, D.; Matsushita, T.; Mikulec, I.; Rabady, D.; Rad, N.; Rahbaran, B.; Rohringer, H.; Schieck, J.; Strauss, J.; Waltenberger, W.; Wulz, C.-E.; Dvornikov, O.; Makarenko, V.; Zykunov, V.; Mossolov, V.; Shumeiko, N.; Gonzalez, J. Suarez; Alderweireldt, S.; De Wolf, E. A.; Janssen, X.; Lauwers, J.; Van De Klundert, M.; Van Haevermaet, H.; Van Mechelen, P.; Van Remortel, N.; Van Spilbeeck, A.; Zeid, S. Abu; Blekman, F.; D'Hondt, J.; Daci, N.; De Bruyn, I.; Deroover, K.; Lowette, S.; Moortgat, S.; Moreels, L.; Olbrechts, A.; Python, Q.; Tavernier, S.; Van Doninck, W.; Van Mulders, P.; Van Parijs, I.; Brun, H.; Clerbaux, B.; De Lentdecker, G.; Delannoy, H.; Fasanella, G.; Favart, L.; Goldouzian, R.; Grebenyuk, A.; Karapostoli, G.; Lenzi, T.; Léonard, A.; Luetic, J.; Maerschalk, T.; Marinov, A.; Randle-conde, A.; Seva, T.; Velde, C. Vander; Vanlaer, P.; Vannerom, D.; Yonamine, R.; Zenoni, F.; Zhang, F.; Cimmino, A.; Cornelis, T.; Dobur, D.; Fagot, A.; Garcia, G.; Gul, M.; Khvastunov, I.; Poyraz, D.; Salva, S.; Schöfbeck, R.; Tytgat, M.; Van Driessche, W.; Yazgan, E.; Zaganidis, N.; Bakhshiansohi, H.; Beluffi, C.; Bondu, O. et al.
Bibliographical reference
Journal of High Energy Physics, Volume 2017, Issue 4, article id. #39, 45 pp.
Advertised on:
4
2017
Citations
126
Refereed citations
113
Description
The spectra of charged particles produced within the pseudorapidity
window | η| < 1 at √{s_{NN}}=5.02 TeV are measured using 404
μb-1 of PbPb and 27.4 pb-1 of pp data collected
by the CMS detector at the LHC in 2015. The spectra are presented over
the transverse momentum ranges spanning 0 .5 < p T <
400 GeV in pp and 0 .7 < p T < 400 GeV in PbPb
collisions. The corresponding nuclear modification factor, R
AA, is measured in bins of collision centrality. The R
AA in the 5% most central collisions shows a maximal
suppression by a factor of 7-8 in the p T region of 6-9 GeV.
This dip is followed by an increase, which continues up to the highest p
T measured, and approaches unity in the vicinity of p
T = 200 GeV. The R AA is compared to theoretical
predictions and earlier experimental results at lower collision
energies. The newly measured pp spectrum is combined with the pPb
spectrum previously published by the CMS collaboration to construct the
pPb nuclear modification factor, R pA, up to 120 GeV. For p
T > 20 GeV, R pA exhibits weak momentum
dependence and shows a moderate enhancement above unity. [Figure not
available: see fulltext.]