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Transverse momentum spectra and nuclear modification factors of charged particles in Xe-Xe collisions at √(s_(NN)) = 5.44 TeV

11 May 2018arXiv:1805.04399links table onlyarchive 2025-07-28

ALICE Collaboration

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Transverse momentum (p_T) spectra of charged particles at mid-pseudorapidity in Xe-Xe collisions at √(s_(NN)) = 5.44 TeV measured with the ALICE apparatus at the Large Hadron Collider are reported. The kinematic range 0.15 < p_T < 50 GeV/c and |η| < 0.8 is covered. Results are presented in nine classes of collision centrality in the 0-80% range. For comparison, a pp reference at the collision energy of √(s) = 5.44 TeV is obtained by interpolating between existing \pp measurements at √(s) = 5.02 and 7 TeV. The nuclear modification factors in central Xe-Xe collisions and Pb-Pb collisions at a similar center-of-mass energy of √(s_(NN)) = 5.02 TeV, and in addition at 2.76 TeV, at analogous ranges of charged particle multiplicity density ⟨dN_(ch)/dη⟩ show a remarkable similarity at p_T> 10 GeV/c. The centrality dependence of the ratio of the average transverse momentum ⟨p_T⟩ in Xe-Xe collisions over Pb-Pb collision at √(s) = 5.02 TeV is compared to hydrodynamical model calculations.

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