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

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F18%3A00486513" target="_blank" >RIV/61389005:_____/18:00486513 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/18:00486513 RIV/68407700:21340/18:00328363
Result on the web
<a href="http://dx.doi.org/10.1016/j.physletb.2017.11.044" target="_blank" >http://dx.doi.org/10.1016/j.physletb.2017.11.044</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.physletb.2017.11.044" target="_blank" >10.1016/j.physletb.2017.11.044</a>

Result language
angličtina
Original language name
First measurement of jet mass in Pb-Pb and p-Pb collisions at the LHC
Original language description
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.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10304 - Nuclear physics

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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