Počet záznamů: 1
Search for jet quenching effects in high-multiplicity proton-proton collisions at root s = 13TeV
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SYSNO ASEP 0546394 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Search for jet quenching effects in high-multiplicity proton-proton collisions at root s = 13TeV Tvůrce(i) Křížek, Filip (UJF-V) RID, ORCID, SAI Celkový počet autorů 1 Číslo článku 156 Zdroj.dok. Proceedings of Science, 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions, 387. - Trieste : Sissa Medialab Srl, 2021 - ISSN 1824-8039 Poč.str. 5 s. Forma vydání Online - E Akce 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions (HardProbes 2020) Datum konání 01.06.2020 - 06.06.2020 Místo konání Austin Země US - Spojené státy americké Typ akce WRD Jazyk dok. eng - angličtina Země vyd. IT - Itálie Klíč. slova ALICE collaboration ; charged particle multiplicities Vědní obor RIV BG - Jaderná, atomová a mol. fyzika, urychlovače Obor OECD Nuclear physics CEP LTT17018 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Výzkumná infrastruktura CERN-CZ II - 90104 - Fyzikální ústav AV ČR, v. v. i. Institucionální podpora UJF-V - RVO:61389005 EID SCOPUS 85116031321 DOI 10.22323/1.387.0156 Anotace The ALICE Collaboration reports results of a novel approach to jet-quenching measurements in high-multiplicity pp collisions at roots = 13 TeV, searching for broadening of the acoplanarity distribution measured by the semi-inclusive distribution of jets recoiling from a high-pT hadron. Charged-particle jet reconstruction is carried out using the anti-kT algorithm with R = 0.4. A data-driven statistical method is used to correct the recoil jet yield for uncorrelated background, including multi-partonic interactions. High-multiplicity (HM) pp events are selected based on charged-particle multiplicity registered in forward scintillator detectors, and their acoplanarity distributions are compared to those for Minimum Bias (MB) events. Significant broadening is observed in the acoplanarity distribution of HM events, consistent with jet quenching. However, qualitatively similar features are also seen in a simulated population of pp collisions generated by PYTHIA 8 Monash, which does not incorporate jet quenching. We utilize these PYTHIA simulations to explore the origin of the observed effect. The PYTHIA simulations suggest that the enhanced acoplanarity results from the bias induced by the HM selection towards multi-jet final states. Pracoviště Ústav jaderné fyziky Kontakt Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Rok sběru 2022
Počet záznamů: 1