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Measurements of the suppression and correlations of dijets in Xe+Xe collisions at Formula Presented TeV
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Measurements of the suppression and correlations of dijets in Xe+Xe collisions at Formula Presented TeV

E.K. Filmer, P. Jackson, A.X.Y. Kong, H. Potti, T.A. Ruggeri, E.X.L. Ting, M.J. White, D.M. Gingrich, J.H. Lindon, N. Nishu, …
Physical Review C, 卷.108(2), 024906
08/2023
DOI: https://doi.org/10.1103/PhysRevC.108.024906

摘要

Nuclear and High Energy Physics
Measurements of the suppression and correlations of dijets is performed using 3 µ b − 1 of Xe+Xe data at s N N = 5.44 TeV collected with the ATLAS detector at the CERN Large Hadron Collider. Dijets with jets reconstructed using the R = 0.4 anti- k t algorithm are measured differentially in jet p T over the range of 32 to 398 GeV and the centrality of the collisions. Significant dijet momentum imbalance is found in the most central Xe+Xe collisions, which decreases in more peripheral collisions. Results from the measurement of per-pair normalized and absolutely normalized dijet p T balance are compared with previous Pb + Pb measurements at s N N = 5.02 TeV. The differences between the dijet suppression in Xe+Xe and Pb + Pb are further quantified by the ratio of pair nuclear-modification factors. The results are found to be consistent with those measured in Pb + Pb data when compared in classes of the same event activity and when taking into account the difference between the center-of-mass energies of the initial parton scattering process in Xe+Xe and Pb + Pb collisions. These results should provide input for a better understanding of the role of energy density, system size, path length, and fluctuations in the parton energy loss.

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