Электронный каталог

Статья

Aad, G.
Azimuthal Anisotropics of Charged Particles with High Transverse Momentum i Pb+Pb Collisions at *%s&sub(NN)=5.02 TeV with the ATLAS Detector / G.Aad, F.Ahmadov, I.N.Aleksandrov, V.A.Bednyakov, I.R.Boyko, G.Chelkov, A.Cheplakov, M.V.Chizhov, D.V.Dedovich, M.Demichev, A.R.Didenko, M.I.Gostkin, S.N.Karpov, Z.M.Karpova, U.Kruchonak, V.Kukhtin, Y.Kulchitsky, E.Ladygin, V.Lyubushkin, T.Lyubushkina, S.Malyukov, M.Mineev, E.Plotnikova, I.N.Potrap, N.A.Rusakovich, M.Shiyakova, A.Soloshenko, A.Tropina, P.V.Tsiareshka, T.Turtuvshin, A.Vasyukov, I.Yeletskikh, A.Zhemchugov, N.I.Zimine, [ATLAS Collab.]. – Text : electronic // Physical Review C. – 2025. – Vol. 112, No. 2. – P. 024910. – URL: https://doi.org/10.1103/d46f-yl4n. – Bibliogr.: 53.

A measurement is presented of elliptic (v&sub(2)) and triangular (v&sub(3)) azimuthal anisotropy coefficients for charged particles produced in Pb+Pb collisions at √s&sub(NN) = 5.02 TeV using a dataset corresponding to an integrated luminosity of 0.44 nb−1 collected with the ATLAS detector at the LHC in 2018. The values of v&sub(2) and v&sub(3) are measured for charged particles over a wide range of transverse momentum (p&sub(T)), 1–400 GeV, and Pb+Pb collision centrality, 0–60%, using the scalar-product and multiparticle cumulant methods. These methods are sensitive to event-by-event fluctuations and nonflow effects in the measurements of azimuthal anisotropies. Positive values of v&sub(2) are observed up to a p&sub(T) of approximately 100 GeV from both methods across all centrality intervals. Positive values of v&sub(3) are observed up to approximately 25 GeV using both methods, though the application of the three-subevent technique to the multiparticle cumulant method leads to significant changes at the highest p&sub(T). At high p&sub(T) (p&sub(T)*} 10 GeV), charged particles are dominantly from jet fragmentation. These jets, and hence the measurements presented here, are sensitive to the path-length dependence of parton energy loss in the quark-gluon plasma produced in Pb+Pb collisions.



ОИЯИ = ОИЯИ (JINR)2025