Search for Jet Quenching in High-Miltiplicity pp Collisions Using Inclusive and Semi-Inclusive Jet Production in ALICE

0577053 - ÚJF 2024 RIV PL eng C - Conference Paper (international conference)
Křížek, Filip
Search for Jet Quenching in High-Miltiplicity pp Collisions Using Inclusive and Semi-Inclusive Jet Production in ALICE.
Acta Physica Polonica B - Proceedings Supplement. Vol. 16. Krakow: Faculty of Physics, Astronomy and Applied Computer Science, 2023, č. článku 1-A69. ISSN 1899-2358. E-ISSN 2082-7865.
[International Conference on Ultrarelativistic Nucleus-Nucleus Collisions: Quark Matter 2022 /29./. Krakow (PL), 04.04.2022-10.04.2022]
R&D Projects: GA MŠMT(CZ) LTT17018
Research Infrastructure: CERN-CZ III - 90240
Institutional support: RVO:61389005
Keywords : ALICE collaboration * heavy ion collisions
OECD category: Nuclear physics
https://doi.org/10.5506/APhysPolBSupp.16.1-A69

These proceedings report on recent experimental searches for jet-quenching effects in pp collisions at root s = 13 TeV. The measurements are based on two jet observables: inclusive jet production and the semi-inclusive yield of jets recoiling from a high-transverse-momentum (p(T)) hadron. Both measurements are carried out differentially in event multiplicity, which is assumed to bias the size of the collision system. To search for jet quenching effects, the shape of the inclusive jet yield in different multiplicity intervals is compared to the one obtained in minimum bias (MB) events. The increase in selected charged-particle multiplicity causes a rise in the jet yield but only minor changes in the slope of the jet spectrum above 20 GeV/c. In the semi-inclusive analysis, recoil jet acoplanarity is measured for events selected on high multiplicity (HM) and compared to the MB population. A striking modification of the acoplanarity distribution, which is nominally characteristic of jet quenching, is observed in the measured HM population. Its origin is elucidated by comparisons with PYTHIA calculations.
Permanent Link: https://hdl.handle.net/11104/0346322