Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Measurements of Chemical Potentials in Pb-Pb Collisions at sNN =5.02 TeV

Acharya, S. ; Basu, S. LU orcid ; Christiansen, P. LU ; Hansen, J. LU orcid ; Iversen, K.E. LU orcid ; Matonoha, O. LU ; Nepeivoda, R. LU orcid ; Ohlson, A. LU ; Silvermyr, D. LU orcid and Staa, J. LU , et al. (2024) In Physical Review Letters 133(9).
Abstract
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. © 2024 CERN.
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; ; ; and , et al. (More)
; ; ; ; ; ; ; ; ; ; and (Less)
author collaboration
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Colliding beam accelerators, Germanium compounds, Negative ions, Photons, Positive ions, Tellurium compounds, A-center, Baryon chemical potential, Center-of-mass energies, Centre-of-mass energies, Hadronization, Measurements of, Mid-rapidity, Pb-Pb collisions, Precise measurements, Yields ratio, article, electric potential, Lead alloys
in
Physical Review Letters
volume
133
issue
9
article number
092301
publisher
American Physical Society
external identifiers
  • scopus:85203129208
  • pmid:39270180
ISSN
0031-9007
DOI
10.1103/PhysRevLett.133.092301
language
English
LU publication?
yes
id
2f23911f-5e37-47f1-b2b8-e861c7e2c057
date added to LUP
2024-12-17 15:23:09
date last changed
2025-04-04 15:40:33
@article{2f23911f-5e37-47f1-b2b8-e861c7e2c057,
  abstract     = {{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.  © 2024 CERN.}},
  author       = {{Acharya, S. and Basu, S. and Christiansen, P. and Hansen, J. and Iversen, K.E. and Matonoha, O. and Nepeivoda, R. and Ohlson, A. and Silvermyr, D. and Staa, J. and Vislavicius, V. and Zurlo, N.}},
  issn         = {{0031-9007}},
  keywords     = {{Colliding beam accelerators; Germanium compounds; Negative ions; Photons; Positive ions; Tellurium compounds; A-center; Baryon chemical potential; Center-of-mass energies; Centre-of-mass energies; Hadronization; Measurements of; Mid-rapidity; Pb-Pb collisions; Precise measurements; Yields ratio; article; electric potential; Lead alloys}},
  language     = {{eng}},
  number       = {{9}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Letters}},
  title        = {{Measurements of Chemical Potentials in Pb-Pb Collisions at sNN =5.02 TeV}},
  url          = {{http://dx.doi.org/10.1103/PhysRevLett.133.092301}},
  doi          = {{10.1103/PhysRevLett.133.092301}},
  volume       = {{133}},
  year         = {{2024}},
}