TY  - INPR
T1  - Closing in on critical net-baryon fluctuations at LHC energies: cumulants up to third order in Pb–Pb collisions
T2  - arXiv
N2  - Fluctuation measurements are important sources of information on the mechanism of particle production at LHC energies. This article reports the first experimental results on third-order cumulants of the net-proton distributions in Pb−Pb collisions at a center-of-mass energy sNN−−−√=5.02 TeV recorded by the ALICE detector. The results on the second-order cumulants of net-proton distributions at sNN−−−√=2.76 and 5.02 TeV are also discussed in view of effects due to the global and local baryon number conservation. The results demonstrate the presence of long-range rapidity correlations between protons and antiprotons. Such correlations originate from the early phase of the collision. The experimental results are compared with HIJING and EPOS model calculations, and the dependence of the fluctuation measurements on the phase-space coverage is examined in the context of lattice quantum chromodynamics (LQCD) and hadron resonance gas (HRG) model estimations. The measured third-order cumulants are consistent with zero within experimental uncertainties of about 4% and are described well by LQCD and HRG predictions.
T3  - CERN Report - CERN-EP-2022-111 
Y1  - 2022
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/80097
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-800974
UR  - https://arxiv.org/abs/2206.03343v1
IS  - 2206.03343 Version 1
PB  - arXiv
ER  -