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.

Tumasyan, A., Adam, W., Andrejkovic, J.w., Bergauer, T., Chatterjee, S., Damanakis, K., et al. (2024). Study of azimuthal anisotropy of γ(1S) mesons in pPb collisions at √SNN=8.16 TeV. PHYSICS LETTERS. SECTION B, 850, 1-25 [10.1016/j.physletb.2024.138518].

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

Battilana, C;Bonacorsi, D;Castro, A;Cuffiani, M;Diotalevi, T;Fanfani, A;Giommi, L;Guiducci, L;Rovelli, T;Siroli, GP;
2024

Abstract

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.
2024
Tumasyan, A., Adam, W., Andrejkovic, J.w., Bergauer, T., Chatterjee, S., Damanakis, K., et al. (2024). Study of azimuthal anisotropy of γ(1S) mesons in pPb collisions at √SNN=8.16 TeV. PHYSICS LETTERS. SECTION B, 850, 1-25 [10.1016/j.physletb.2024.138518].
Tumasyan, A; Adam, W; Andrejkovic, Jw; Bergauer, T; Chatterjee, S; Damanakis, K; Dragicevic, M; Del Valle, Ae; Hussain, Ps; Jeitler, M; Krammer, N; Le...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1007742
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