Measurements of jet quenching via hadron+jet correlations in Pb-Pb and high-particle multiplicity pp collisions with ALICE

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F22%3A00557397" target="_blank" >RIV/61389005:_____/22:00557397 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.22323/1.398.0293" target="_blank" >http://dx.doi.org/10.22323/1.398.0293</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.22323/1.398.0293" target="_blank" >10.22323/1.398.0293</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurements of jet quenching via hadron+jet correlations in Pb-Pb and high-particle multiplicity pp collisions with ALICE

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Measurements of jet quenching via hadron+jet correlations in Pb-Pb and high-particle multiplicity pp collisions with ALICE

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/LTT17018" target="_blank" >LTT17018: Získávání nových poznatků o mikrosvětě v infrastruktuře CERN</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of Science

ISBN

—

ISSN

1824-8039

e-ISSN

—

Počet stran výsledku

6

Strana od-do

293

Název nakladatele

Sissa Medialab srl

Místo vydání

Trieste

Místo konání akce

online

Datum konání akce

26. 7. 2021

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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