First measurement of jet mass in Pb-Pb and p-Pb collisions at the LHC

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Acharya, S, Adamova, D, Aggarwal, MM, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, N, Ahn, SU, Aiola, S et al (show 1017 more authors) , Akindinov, A, Alam, SN, Albuquerque, DSD, Aleksandrov, D, Alessandro, B, Alexandre, D, Molina, R Alfaro, Alici, A, Alkin, A, Alme, J, Alt, T, Altsybeev, I, Prado, C Alves Garcia, An, M, Andrei, C, Andrews, HA, Andronic, A, Anguelov, V, Anson, C, Anticic, T, Antinori, F, Antonioli, P, Anwar, R, Aphecetche, L, Appelshauser, H, Arcelli, S, Arnaldi, R, Arnold, OW, Arsene, IC, Arslandok, M, Audurier, B, Augustinus, A, Averbeck, R, Azmi, MD, Badala, A, Baek, YW, Bagnasco, S, Bailhache, R, Bala, R, Baldisseri, A, Ball, M, Baral, RC, Barbano, AM, Barbera, R, Barile, F, Barioglio, L, Barnafoldi, GG, Barnby, LS, Barret, V, Bartalini, P, Barth, K, Bartke, J, Bartsch, E, Basile, M, Bastid, N, Basu, S, Bathen, B, Batigne, G, Camejo, A Batista, Batyunya, B, Batzing, PC, Bearden, IG, Beck, H, Bedda, C, Behera, NK, Belikov, I, Bellini, F, Martinez, 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Pb-Pb and p-Pb collisions at the LHC PHYSICS LETTERS B, 776. pp. 249-264. ISSN 0370-2693, 1873-2445

Text First measurement of jet mass in Pb–Pb and p–Pb collisions at the LHC.pdf - Author Accepted Manuscript Download (393kB)

Abstract

This letter presents the first measurement of jet mass in Pb–Pb and p–Pb collisions at s<inf>NN</inf>=2.76 TeV and s<inf>NN</inf>=5.02 TeV, respectively. Both the jet energy and the jet mass are expected to be sensitive to jet quenching in the hot Quantum Chromodynamics (QCD) matter created in nuclear collisions at collider energies. Jets are reconstructed from charged particles using the anti-k<inf>T</inf> jet algorithm and resolution parameter R=0.4. The jets are measured in the pseudorapidity range |η<inf>jet</inf>|<0.5 and in three intervals of transverse momentum between 60 GeV/c and 120 GeV/c. The measurement of the jet mass in central Pb–Pb collisions is compared to the jet mass as measured in p–Pb reference collisions, to vacuum event generators, and to models including jet quenching. It is observed that the jet mass in central Pb–Pb collisions is consistent within uncertainties with p–Pb reference measurements. Furthermore, the measured jet mass in Pb–Pb collisions is not reproduced by the quenching models considered in this letter and is found to be consistent with PYTHIA expectations within systematic uncertainties.

Item Type:	Article
Uncontrolled Keywords:	5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	11 Jan 2018 11:36
Last Modified:	16 Jun 2026 14:48
DOI:	10.1016/j.physletb.2017.11.044
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3015848
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