E-viri
PDF
Recenzirano
Odprti dostop
-
Adamová, D.; Agrawal, N.; Akbar, Z.; Akindinov, A.; Aleksandrov, D.; Alessandro, B.; Alici, A.; Alkin, A.; Andrei, C.; Andronic, A.; Bailhache, R.; Barnby, L. S.; Bedda, C.; Bhat, I. R.; Bolozdynya, A.; Buesching, H.; Buhler, P.; Capon, A. A.; Chang, W.; Chochula, P.; Conesa Balbastre, G.; Contin, G.; Crochet, P.; Das, P.; Dudi, S.; Ehlers, R. J.; Elia, D.; Evans, D.; Fecchio, P.; Garabatos, C.; Garg, K.; Gasik, P.; Germain, M.; Grigoras, C.; Haake, R.; Hippolyte, B.; Honermann, J.; Hosokawa, R.; Ilkaev, R.; Ippolitov, M.; Kebschull, U.; Khuntia, A.; Kim, S.; Krzewicki, M.; Kuijer, P. G.; Kurashvili, P.; Lehrbach, J.; Lim, B.; Mahmoud, T.; Malzacher, P.; Marín, A.; Mastroserio, A.; Melikyan, Y.; Menchaca-Rocha, A.; Negrao De Oliveira, R. A.; Neumann, L. T.; Paić, G.; Peitzmann, T.; Pestov, Y.; Płoskoń, M.; Polichtchouk, B.; Poljak, N.; Ragoni, S.; Read, K. F.; Reichelt, P.; Rossi, A.; Sarti, V. M.; Schmidt, N. V.; Schmier, A. R.; Schwarz, K.; Selyuzhenkov, I.; Serebryakov, D.; Sharma, H.; Singh, R.; Sitta, M.; Slupecki, M.; Stritto, L. D.; Suire, C.; Tambave, G. J.; Telesca, A.; Tieulent, R.; Tripathy, T.; Trombetta, G.; Uras, A.; Vázquez Doce, O.; Villalobos Baillie, O.; Vinogradov, A.; Virgili, T.; Vislavicius, V.; Voloshin, K.; Voloshin, S. A.; Vorobyev, I.; Weber, S. G.; Wikne, J.; Wilkinson, J.; Willems, G. A.; Zaccolo, V.; Zardoshti, N.; Zhang, X.; Zhu, Y.
The journal of high energy physics, 09/2020, Letnik: 2020, Številka: 9Journal Article
A bstract Systematic studies of charge-dependent two- and three-particle correlations in Pb-Pb collisions at $$ \sqrt{s_{\mathrm{NN}}} $$ s NN = 2.76 and 5.02 TeV used to probe the Chiral Magnetic Effect (CME) are presented. These measurements are performed for charged particles in the pseudorapidity ( η ) and transverse momentum ( p T ) ranges | η | < 0 . 8 and 0 . 2 < p T < 5 GeV/ c . A significant charge-dependent signal that becomes more pronounced for peripheral collisions is reported for the CME-sensitive correlators γ 1, 1 = 〈cos( φ α + φ β − 2Ψ 2 )〉 and γ 1, − 3 = 〈cos( φ α − 3 φ β + 2Ψ 2 )〉. The results are used to estimate the contribution of background effects, associated with local charge conservation coupled to anisotropic flow modulations, to measurements of the CME. A blast-wave parametrisation that incorporates local charge conservation tuned to reproduce the centrality dependent background effects is not able to fully describe the measured γ 1 , 1 . Finally, the charge and centrality dependence of mixed-harmonics three-particle correlations, of the form γ 1, 2 = 〈cos( φ α + 2 φ β − 3Ψ 3 )〉, which are insensitive to the CME signal, verify again that background contributions dominate the measurement of γ 1 , 1 .
