Closing in on critical net-baryon fluctuations at LHC energies: Cumulants up to third order in Pb-Pb collisions

0581039 - ÚJF 2024 RIV NL eng J - Journal Article
Acharya, S. - Adamová, Dagmar - Adler, A. - Aglieri Rinella, G. - Bielčík, J. - Bielčíková, Jana - Broz, M. - Contreras, J. G. - Filová, V. - Grecká, Ekaterina - Grund, D. - Herman, T. - Horák, D. - Isakov, Artem - Kotliarov, Artem - Krupová, D. M. - Křížek, Filip - Křížková Gajdošová, K. - Kushpil, Svetlana - Petráček, V. - Šafařík, K. - Torres, S. R. - Závada, Petr … Total 1039 authors
Closing in on critical net-baryon fluctuations at LHC energies: Cumulants up to third order in Pb-Pb collisions.
Physics Letters. B. Roč. 844, SEP (2023), č. článku 137545. ISSN 0370-2693. E-ISSN 1873-2445
Research Infrastructure: CERN-CZ III - 90240
Institutional support: RVO:61389005 ; RVO:68378271
Keywords : ALICE collaboration * heavy ion collisions
OECD category: Nuclear physics; Particles and field physics (FZU-D)
Impact factor: 4.3, year: 2022
Method of publishing: Open access
https://doi.org/10.1016/j.physletb.2022.137545

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 root s(NN) = 5.02 TeV recorded by the ALICE detector. The results on the second-order cumulants of net-proton distributions at root s(NN) = 2.76 and 5.02TeV 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.
Permanent Link: https://hdl.handle.net/11104/0349605