Comparison of fragmentation functions for jets dominated by light quarks and gluons from pp and Pb plus Pb collisions in ATLAS

0519337 - FZÚ 2020 RIV US eng J - Journal Article
Aaboud, M. - Aad, G. - Abbott, B. - Chudoba, Jiří - Hejbal, Jiří - Hladík, Ondřej - Jačka, Petr - Jakoubek, Tomáš - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … Total 2905 authors
Comparison of fragmentation functions for jets dominated by light quarks and gluons from pp and Pb plus Pb collisions in ATLAS.
Physical Review Letters. Roč. 123, č. 4 (2019), s. 1-21, č. článku 042001. ISSN 0031-9007. E-ISSN 1079-7114
R&D Projects: GA MŠMT LM2015058
Institutional support: RVO:68378271
Keywords : ATLAS * charged particle * fragmentation * CERN LHC Coll * Monte Carlo * peripheral * photon * quark gluon * 5020 GeV-cms/nucleon
OECD category: Particles and field physics
Impact factor: 8.385, year: 2019
Method of publishing: Open access

Charged-particle fragmentation functions for jets azimuthally balanced by a high-transverse-momentum, prompt, isolated photon are measured in 25  pb-1 of pp and 0.49  nb-1 of Pb+Pb collision data at 5.02 TeV per nucleon pair recorded with the ATLAS detector at the Large Hadron Collider. The measurements are compared to predictions of Monte Carlo generators and to measurements of inclusively selected jets. In pp collisions, a different jet fragmentation function in photon-tagged events from that in inclusive jet events arises from the difference in fragmentation between light quarks and gluons. The ratios of the fragmentation functions in Pb+Pb events to that in pp events are used to explore the parton color-charge dependence of jet quenching in the hot medium.

Permanent Link: http://hdl.handle.net/11104/0304334