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Measurement of the sixth-order cumulant of net-proton multiplicity distributions in Au + Au collision at √sNN=27, 54.4, and 200 GeV at RHIC

According to first-principle lattice QCD calculations, the transition from quark-gluon plasma to hadronic matter is a smooth crossover in the region μB≤Tc. In this range the ratio, C6/C2, of net-baryon distributions are predicted to be negative. In this Letter, we report the first measurement of the...

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Bibliographic Details
Main Authors: Abdallah, Mohamed Samy (Author) , Deppner, Ingo Martin (Author) , Herrmann, Norbert (Author) , Söhngen, Yannick (Author) , Weidenkaff, Philipp (Author)
Corporate Author: STAR Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 20 December 2021
In: Physical review letters
Year: 2021, Volume: 127, Issue: 26, Pages: 1-7
ISSN:1079-7114
DOI:10.1103/PhysRevLett.127.262301
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.127.262301
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.127.262301
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Author Notes:M. S. Abdallah, ... I. M. Deppner, ... N. Herrmann, ... Y. Söhngen, ... P. C. Weidenkaff, ... [und 388 weitere Autoren] (STAR Collaboration)
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Summary:According to first-principle lattice QCD calculations, the transition from quark-gluon plasma to hadronic matter is a smooth crossover in the region μB≤Tc. In this range the ratio, C6/C2, of net-baryon distributions are predicted to be negative. In this Letter, we report the first measurement of the midrapidity net-proton C6/C2 from 27, 54.4, and 200 GeV Au+Au collisions at the Relativistic Heavy Ion Collider (RHIC). The dependence on collision centrality and kinematic acceptance in (pT, y) are analyzed. While for 27 and 54.4 GeV collisions the C6/C2 values are close to zero within uncertainties, it is observed that for 200 GeV collisions, the C6/C2 ratio becomes progressively negative from peripheral to central collisions. Transport model calculations without critical dynamics predict mostly positive values except for the most central collisions within uncertainties. These observations seem to favor a smooth crossover in the high-energy nuclear collisions at top RHIC energy.
Item Description:Gesehen am 18.08.2022
Im Titel steht der Ausdruck "sNN" unter dem Wurzelsymbol, dabei ist "NN" ist tiefgestellt
Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.127.262301

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