Study of azimuthal anisotropy of γ(1S) mesons in pPb collisions at √SNN=8.16 TeV

Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; Dragicevic, M.; Del Valle, A. Escalante; Hussain, P. S.; Jeitler, M.; Krammer, N.; Lechner, L.; Liko, D.; Mikulec, I.; Paulitsch, P.; Pitters, F. M.; Schieck, J.; Schoefbeck, R.; Schwarz, D.; Sonawane, M.; Templ, S.; Waltenberger, W.; Wulz, C. -E.; Darwish, M. R.; Janssen, T.; Kello, T.; Sfar, H. Rejeb; Van Mechelen, P.; Bols, E. S.; D'Hondt, J.; De Moor, A.; Delcourt, M.; El Faham, H.; Lowette, S.; Moortgat, S.; Morton, A.; Mueller, D.; Sahasransu, A. R.; Tavernier, S.; Van Doninck, W.; Vannerom, D.; Clerbaux, B.; De Lentdecker, G.; Favart, L.; Hohov, D.; Jaramillo, J.; Lee, K.; Mahdavikhorrami, M.; Makarenko, I.; Malara, A.; Paredes, S.; Petre, L.; Postiau, N.; Thomas, L.; Vanden Bemden, M.; Vander Velde, C.; Vanlaer, P.; Dobur, D.; Knolle, J.; Lambrecht, L.; Mestdach, G.; Niedziela, M.; Rendon, C.; Roskas, C.; Samalan, A.; Skovpen, K.; Tytgat, M.; Van Den Bossche, N.; Vermassen, B.; Wezenbeek, L.; Benecke, A.; Bruno, G.; Bury, F.; Caputo, C.; David, P.; Delaere, C.; Donertas, I. S.; Giammanco, A.; Jaffel, K.; Jain, Sa.; Lemaitre, V.; Mondal, K.; Taliercio, A.; Tran, T. T.; Vischia, P.; Wertz, S.; Alves, G. A.; Coelho, E.; Hensel, C.; Moraes, A.; Rebello Teles, P.; Alda Junior, W. L.; Alves Gallo Pereira, M.; Barroso Ferreira Filho, M.; Brandao Malbouisson, H.; Carvalho, W.; Chinellato, J.; Da Costa, E. M.; Da Silveira, G. G.; De Jesus Damiao, D.; et al.

doi:10.1016/j.physletb.2024.138518

research article

Study of azimuthal anisotropy of γ(1S) mesons in pPb collisions at √SNN=8.16 TeV

Tumasyan, A.

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Adam, W.

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Andrejkovic, J. W.

March 1, 2024

Physics Letters B

The azimuthal anisotropy of gamma(1S) mesons in high-multiplicity proton-lead collisions is studied using data collected by the CMS experiment at a nucleon-nucleon center-of-mass energy of 8.16 TeV. The gamma(1S) mesons are reconstructed using their dimuon decay channel. The anisotropy is characterized by the second Fourier harmonic coefficients, found using a two-particle correlation technique, in which the gamma(1S) mesons are correlated with charged hadrons. A large pseudorapidity gap is used to suppress short-range correlations. Nonflow contamination from the dijet background is removed using a low-multiplicity subtraction method, and the results are presented as a function of gamma(1S) transverse momentum. The azimuthal anisotropies are smaller than those found for charmonia in proton-lead collisions at the same collision energy, but are consistent with values found for gamma(1S) mesons in lead-lead interactions at a nucleon-nucleon center-of-mass energy of 5.02 TeV.