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Collision-energy dependence of deuteron cumulants and proton-deuteron correlations in Au+Au collisions at RHIC': letter

We report the first measurements of cumulants, up to 4th order, of deuteron number distributions and proton-deuteron correlations in Au+Au collisions recorded by the STAR experiment in phase-I of Beam Energy Scan (BES) program at the Relativistic Heavy Ion Collider. Deuteron cumulants, their ratios,...

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Bibliographic Details
Main Authors: Abdulhamid, Muhammad Ibrahim (Author) , Deppner, Ingo Martin (Author) , Leung, Yue (Author) , Söhngen, Yannick (Author)
Corporate Author: STAR Collaboration (Author)
Format: Article (Journal)
Language:English
Published: August 2024
In: Physics letters
Year: 2024, Volume: 855, Pages: 138560-1-138560-8
ISSN:1873-2445
DOI:10.1016/j.physletb.2024.138560
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.physletb.2024.138560
Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0370269324001187
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Author Notes:the STAR Collaboration: M.I. Abdulhamid, I.M. Deppner, Y.H. Leung, J. Söhngen [und zahlreiche weitere]
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Summary:We report the first measurements of cumulants, up to 4th order, of deuteron number distributions and proton-deuteron correlations in Au+Au collisions recorded by the STAR experiment in phase-I of Beam Energy Scan (BES) program at the Relativistic Heavy Ion Collider. Deuteron cumulants, their ratios, and proton-deuteron mixed cumulants are presented for different collision centralities covering a range of center-of-mass energy per nucleon pair sNN=7.7 to 200 GeV. It is found that the cumulant ratios at lower collision energies favor a canonical ensemble over a grand canonical ensemble in thermal models. An anti-correlation between proton and deuteron multiplicity is observed across all collision energies and centralities, consistent with the expectation from global baryon number conservation. The UrQMD model coupled with a phase-space coalescence mechanism qualitatively reproduces the collision-energy dependence of cumulant ratios and proton-deuteron correlations.
Item Description:Gesehen am 09.07.2025
Physical Description:Online Resource
ISSN:1873-2445
DOI:10.1016/j.physletb.2024.138560

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