Study of azimuthal anisotropy of γ(1S) mesons in pPb collisions at √SNN=8.16 TeV
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.
WOS:001202461200001
2024-03-01
850
138518
REVIEWED
EPFL
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Science Committee | 22rl-037 |
Belgian Federal Science Policy Office | |
Fonds pour la Formation a la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium) | |
Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium) | |
FWO (Belgium) under the "Excellence of Science EOS | 30820817 |
Beijing Municipal Science & Technology Commission | Z191100007219010 |
Fundamental Research Funds for the Central Universities (China) | |
Ministry of Education, Youth and Sports (MEYS) of the Czech Republic | |
Shota Rustaveli National Science Foundation | FR-22-985 |
Deutsche Forschungsgemeinschaft (DFG) | EXC 2121 |
Hellenic Foundation for Research and Innovation (HFRI) | 2288 |
Hungarian Academy of Sciences | K 124845 |
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