Measurement of jet fragmentation in Pb+Pb and pp collisions at √s.sub.NN./sub. = 2.76 TeV with the ATLAS detector at the LHC

0487094 - FZÚ 2018 RIV DE eng J - Journal Article
Aaboud, M. - Aad, G. - Abbott, B. - Chudoba, Jiří - Hejbal, Jiří - Hladík, Ondřej - Jakoubek, Tomáš - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Kůs, Vlastimil - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … Total 2859 authors
Measurement of jet fragmentation in Pb+Pb and pp collisions at √s_NN = 2.76 TeV with the ATLAS detector at the LHC.
European Physical Journal C. Roč. 77, č. 6 (2017), s. 1-29, č. článku 379. ISSN 1434-6044. E-ISSN 1434-6052
Institutional support: RVO:68378271
Keywords : CERN LHC Coll * structure * rapidity dependence * transverse momentum dependence * impact parameter * dependence * ATLAS
OECD category: Particles and field physics
Impact factor: 5.172, year: 2017

The distributions of transverse momentum and longitudinal momentum fraction of charged particles in jets are measured in Pb+Pb and pp collisions with the ATLAS detector at the LHC. The distributions are measured as a function of jet transverse momentum and rapidity. The analysis utilises an integrated luminosity of 0.14 nb−1 of Pb+Pb data and 4.0 pb−1 of pp data collected in 2011 and 2013, respectively, at the same centre-of-mass energy of 2.76 TeV per colliding nucleon pair. The distributions measured in pp collisions are used as a reference for those measured in Pb+Pb collisions in order to evaluate the impact on the internal structure of jets from the jet energy loss of fast partons propagating through the hot, dense medium created in heavy-ion collisions. Modest but significant centrality-dependent modifications of fragmentation functions in Pb+Pb collisions with respect to those in pp collisions are seen.
Permanent Link: http://hdl.handle.net/11104/0281777