Measurements of jet quenching via hadron+jet correlations in Pb-Pb and high-particle multiplicity pp collisions with ALICE
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F22%3A00618635" target="_blank" >RIV/61389005:_____/22:00618635 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Measurements of jet quenching via hadron+jet correlations in Pb-Pb and high-particle multiplicity pp collisions with ALICE
Original language description
The ALICE Collaboration presents measurements of jet quenching in the 0-10% most central Pb--Pb collisions at √sNN=5.02 TeV and high multiplicity pp collisions at √s=13 TeV by investigating hadron-jet acoplanarity. In Pb-Pb collisions, the obtained acoplanarity distribution exhibits a marked suppression and narrowing when compared to the pp reference spectrum obtained from PYTHIA simulations. Similar measurements for pp collisions show that the acoplanarity distributions obtained in high multiplicity events are significantly suppressed and broadened relative to the analogous distributions from minimum bias events. The observed features are not caused by jet quenching, since they can be reproduced by PYTHIA 8 event generator, which does not account for jet quenching. Analysis of the PYTHIA events reveals that the suppression and broadening of the hadron-jet acoplanarity distributions are the consequence of a bias induced by the ALICE high multiplicity trigger. This trigger increases the probability to measure a high-pT recoil jet in the pseudorapidity acceptance of the forward trigger detectors, and biases toward multi-jet final states.
Czech name
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Czech description
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Classification
Type
O - Miscellaneous
CEP classification
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OECD FORD branch
10304 - Nuclear physics
Result continuities
Project
<a href="/en/project/LTT17018" target="_blank" >LTT17018: Getting new knowledge of the microworld using the CERN infrastructure</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů