A1 Journal article (refereed)
Global baryon number conservation encoded in net-proton fluctuations measured in Pb–Pb collisions at √sNN = 2.76 TeV (2020)


ALICE Collaboration (2020). Global baryon number conservation encoded in net-proton fluctuations measured in Pb–Pb collisions at √sNN = 2.76 TeV. Physics Letters B, 807, 135564. DOI: 10.1016/j.physletb.2020.135564


JYU authors or editors


Publication details

All authors or editors: ALICE Collaboration

Journal or series: Physics Letters B

ISSN: 0370-2693

eISSN: 1873-2445

Publication year: 2020

Volume: 807

Article number: 135564

Publisher: Elsevier B.V.

Publication country: Netherlands

Publication language: English

DOI: http://doi.org/10.1016/j.physletb.2020.135564

Open Access: Publication published in an open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/71248

Web address of parallel published publication (pre-print): https://arxiv.org/abs/1910.14396


Abstract

Experimental results are presented on event-by-event net-proton fluctuation measurements in Pb–Pb collisions at sNN=2.76 TeV, recorded by the ALICE detector at the CERN LHC. These measurements have as their ultimate goal an experimental test of Lattice QCD (LQCD) predictions on second and higher order cumulants of net-baryon distributions to search for critical behavior near the QCD phase boundary. Before confronting them with LQCD predictions, account has to be taken of correlations stemming from baryon number conservation as well as fluctuations of participating nucleons. Both effects influence the experimental measurements and are usually not considered in theoretical calculations. For the first time, it is shown that event-by-event baryon number conservation leads to subtle long-range correlations arising from very early interactions in the collisions.



Contributing organizations


Ministry reporting: Yes


Last updated on 2020-18-08 at 13:23