Number of the records: 1
Measurements of jet quenching via hadron+jet correlations in Pb-Pb and high-particle multiplicity pp collisions with ALICE
- 1.
SYSNO ASEP 0557397 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Measurements of jet quenching via hadron+jet correlations in Pb-Pb and high-particle multiplicity pp collisions with ALICE Author(s) Kotliarov, Artem (UJF-V) ORCID, SAI Number of authors 1 Article number 293 Source Title Proceedings of Science, European Physical Society Conference on High Energy Physics 2021 (EPS-HEP2021), 398. - Trieste : Sissa Medialab srl, 2022 - ISSN 1824-8039 Number of pages 6 s. Publication form Print - P Action The European Physical Society Conference on High Energy Physics (EPS-HEP 2021) Event date 26.07.2021 - 30.07.2021 VEvent location online Country DE - Germany Event type EUR Language eng - English Country IT - Italy Keywords ALICE collaboration ; p nucleus interactions ; jet quenching OECD category Particles and field physics R&D Projects LTT17018 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure CERN-CZ II - 90104 - Fyzikální ústav AV ČR, v. v. i. Institutional support UJF-V - RVO:61389005 EID SCOPUS 85129351859 DOI 10.22323/1.398.0293 Annotation Semi-inclusive measurements of hadron-jet acoplanarity are utilized to search for jet quenching effects in the 0-10% most central Pb-Pb collisions at vsNN = 5.02 TeV and the high-multiplicity pp collisions at vs = 13 TeV. In the Pb-Pb system, where quark-gluon plasma formation is established, a narrowing and suppression of the acoplanarity is observed relative to the PYTHIA-simulated pp reference. In contrast, the acoplanarity distributions that were measured in the high-multiplicity pp events exhibit a marked broadening and suppression with respect to the analogous distributions obtained from the minimum bias events. The observed features are, however, qualitatively reproduced by the PYTHIA 8 Monte Carlo event generator, which does not incorporate jet quenching. The PYTHIA simulations reveal that the observed suppression and broadening are the consequence of a bias induced by the ALICE high-multiplicity trigger, which increases the probability to observe a high-pT recoil jet in the acceptance of the forward trigger detectors and which biases toward multi-jet final states. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2023
Number of the records: 1