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Measurements of chemical potentials in Pb-Pb collisions at √sNN = 5.02 TeV

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This Letter presents the most precise measurement to date of the matter-antimatter imbalance at midrapidity in Pb-Pb collisions at a center-of-mass energy per nucleon pair √𝑠NN=5.02 TeV. Using the Statistical Hadronization framework, it is possible to obtain the value of the electric charge and bary...

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Main Authors: Acharya, Shreyasi (Author) , Angelov, Venelin (Author) , Berdnikova, Anastasia (Author) , Bergmann, Luisa (Author) , Bórquez Cárcamo, Andrés G. (Author) , Danisch, Meike (Author) , Feuillard, Victor (Author) , Fokin, Ilya D. (Author) , Glässel, Peter (Author) , Nath, Abhishek (Author) , Pachmayer, Yvonne C. (Author) , Reygers, Klaus (Author) , Schicker, Rainer (Author) , Schlepper, Felix (Author) , Seo, Jinjoo (Author) , Skorodumovs, Georgijs (Author) , Stachel, Johanna (Author) , Stiefelmaier, Stephan (Author) , Veen, Casper Arie van (Author) , Windelband, Bernd (Author) , Yüncü, Alperen (Author) , Zanone, Federica (Author)
Corporate Author: ALICE (Author)
Format: Article (Journal)
Language:English
Published: 26 August, 2024
In: Physical review letters
Year: 2024, Volume: 133, Issue: 9, Pages: 1-15
ISSN:1079-7114
DOI:10.1103/PhysRevLett.133.092301
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevLett.133.092301
Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.133.092301
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Author Notes:ALICE Collaboration
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Summary:This Letter presents the most precise measurement to date of the matter-antimatter imbalance at midrapidity in Pb-Pb collisions at a center-of-mass energy per nucleon pair √𝑠NN=5.02 TeV. Using the Statistical Hadronization framework, it is possible to obtain the value of the electric charge and baryon chemical potentials, 𝜇𝑄=−0.18±0.90 MeV and 𝜇𝐵=0.71±0.45 MeV, with unprecedented precision. A centrality-differential study of the antiparticle-to-particle yield ratios of charged pions, protons, Ω baryons, and light (hyper)nuclei is performed. These results indicate that the system created in Pb-Pb collisions at the LHC is on average baryon-free and electrically neutral at midrapidity.
Item Description:Im Titel ist NN tiefgestellt
Gesehen am 05.05.2025
ALICE Collaboration: S. Acharya, V. Anguelov, A. Berdnikova, L. Bergmann, A.G. Bórquez Carcamo, M.C. Danisch, V.J.G. Feuillard, I. Fokin, P. Glässel, A. Nath, Y. Pachmayer, K. Reygers, R. Schicker, F. Schlepper, J.J. Seo, G. Skorodumovs, J. Stachel, S.F. Stiefelmaier, C.A. van Veen, B. Windelband, A. Yüncü, F. Zanone, [und 1036 weitere]
Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.133.092301

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