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

Acharya, S.; Adamová, Dagmar; Bielčík, J.; Bielčíková, Jana; Broz, M.; Contreras, J. G.; Ferencei, Jozef; Hladký, Jan; Křížek, Filip; Kučera, Vít; Kushpil, Svetlana; Lavička, R.; Mareš, Jiří A.; Petráček, V.; Pospíšil, Jan; Šumbera, Michal; Vaňát, Tomáš; Závada, Petr

doi:https://dx.doi.org/10.1016/j.physletb.2017.11.044

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

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SYSNO ASEP	0486513
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	First measurement of jet mass in Pb-Pb and p-Pb collisions at the LHC
Author(s)	Acharya, S. (IN) Adamová, Dagmar (UJF-V)_{RID, ORCID, SAI} Bielčík, J. (CZ) Bielčíková, Jana (UJF-V)_{RID, ORCID, SAI} Broz, M. (CZ) Contreras, J. G. (CZ) Ferencei, Jozef (UJF-V)_RID Hladký, Jan (FZU-D)_{RID, ORCID, SAI} Křížek, Filip (UJF-V)_{RID, ORCID, SAI} Kučera, Vít (UJF-V)_RID Kushpil, Svetlana (UJF-V)_{RID, ORCID, SAI} Lavička, R. (CZ) Mareš, Jiří A. (FZU-D)_{RID, ORCID} Petráček, V. (CZ) Pospíšil, Jan (UJF-V) Šumbera, Michal (UJF-V)_{RID, ORCID, SAI} Vaňát, Tomáš (UJF-V)_{ORCID, SAI} Závada, Petr (FZU-D)_{RID, ORCID}
Number of authors	1027
Source Title	Physics Letters. B. - : Elsevier - ISSN 0370-2693 Roč. 776, č. 1 (2018), s. 249-264
Number of pages	16 s.
Publication form	Print - P
Language	eng - English
Country	NL - Netherlands
Keywords	heavy ion collisions ; ALICE collaboration ; induced gluon radiation
Subject RIV	BG - Nuclear, Atomic and Molecular Physics, Colliders
OECD category	Nuclear physics
Subject RIV - cooperation	Institute of Physics - Elementary Particles and High Energy Physics
R&D Projects	LG15052 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	FZU-D - RVO:68378271 ; UJF-V - RVO:61389005
UT WOS	000419641100038
EID SCOPUS	85036586402
DOI	10.1016/j.physletb.2017.11.044
Annotation	This letter presents the first measurement of jet mass in Pb-Pb and Pb-Pb collisions at root s(NN) = 2.76 TeV and root s(NN) = 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(T) jet algorithm and resolution parameter R = 0.4. The jets are measured in the pseudorapidity range \|eta(jet)\| < 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.
Workplace	Nuclear Physics Institute
Contact	Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228
Year of Publishing	2019

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