Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

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

Journal Article · · Physical Review Letters
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; « less

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 s NN = 5.02 TeV . Using the Statistical Hadronization framework, it is possible to obtain the value of the electric charge and baryon chemical potentials, μ Q = 0.18 ± 0.90 MeV and μ B = 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, for the ALICE Collaboration 2024 CERN

Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI ID:
2437820
Alternate ID(s):
OSTI ID: 2538086
OSTI ID: 2477262
OSTI ID: 2568954
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 133; ISSN 0031-9007; ISSN PRLTAO
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (125)

Statistical thermodynamics in relativistic particle and ion physics: Canonical or grand canonical? journal December 1985
Stopping in high energy nucleus-nucleus collisions. analysis in the Landau hydrodynamic model journal January 1989
Thermal equilibration and expansion in nucleus-nucleus collisions at the AGS journal January 1995
Novel mechanism of nucleon stopping in heavy ion collisions journal July 1996
The antiproton-nuclei annihilation cross-section at the momentum range from 0.70 to 2.50 GeV/c journal September 1994
Kernel estimation in high-energy physics journal May 2001
Geant4—a simulation toolkit
  • Agostinelli, S.; Allison, J.; Amako, K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3 https://doi.org/10.1016/S0168-9002(03)01368-8
journal July 2003
Excitation function of K+ and π+ production in Au+Au reactions at 2–10 AGeV journal March 2000
Statistical model description of K+ and K− production between 1–10 A·GeV journal July 2000
An excitation function of K− and K+ production in Au+Au reactions at the AGS journal September 2000
Production of φ-mesons in p+p, p+Pb and central Pb+Pb collisions at  GeV journal October 2000
Hadron production in Au–Au collisions at RHIC journal October 2001
Ξ and production in 158 GeV/nucleon Pb+Pb collisions journal December 1998
Chemical equilibration in Pb+Pb collisions at the SPS journal October 1999
Production and collective behavior of strange particles in Au+Au collisions at 2–8 AGeV journal February 2002
Dynamics of ultra-relativistic nuclear collisions with heavy beams: An experimental overview journal August 1998
Baryon junction stopping at the SPS and RHIC via HIJING/B journal August 1998
Hadron production in nuclear collisions from the NA49 experiment at 158GeV/c · A journal December 1999
Indirect measurement of inelastic cross section of relativistic protons in Pb target journal July 2010
Thermal-FIST: A package for heavy-ion collisions and hadronic equation of state journal November 2019
Systematic investigation of 1.2-GeV proton-induced spallation reactions on targets between Al and U
  • Herbach, Claus-M.; Hilscher, Dietrich; Jahnke, Ulrich
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 562, Issue 2 https://doi.org/10.1016/j.nima.2006.02.033
journal June 2006
The ALICE TPC, a large 3-dimensional tracking device with fast readout for ultra-high multiplicity events
  • Alme, J.; Andres, Y.; Appelshäuser, H.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 622, Issue 1 https://doi.org/10.1016/j.nima.2010.04.042
journal October 2010
Hadron production in central nucleus–nucleus collisions at chemical freeze-out journal June 2006
Energy dependence of hyperon production in nucleus–nucleus collisions at SPS journal August 2004
Kaon production and kaon to pion ratio in Au + Au collisions at sNN=130 GeV journal August 2004
ϕ meson production in Au+Au and p+p collisions at sNN=200GeV journal April 2005
Thermal hadron production in relativistic nuclear collisions: The hadron mass spectrum, the horn, and the QCD phase transition journal March 2009
Erratum to “Thermal hadron production in relativistic nuclear collisions: The hadron mass spectrum, the horn, and the QCD phase transition” [Phys. Lett. B 673 (2009) 142] journal August 2009
Multi-strange baryon production in pp collisions at s=7 TeV with ALICE journal June 2012
Multi-strange baryon production at mid-rapidity in Pb–Pb collisions at sNN=2.76 TeV journal January 2014
Corrigendum to “Multi-strange baryon production at mid-rapidity in Pb–Pb collisions at sNN=2.76 TeV” [Phys. Lett. B 728 (2014) 216-227] journal June 2014
Freeze-out conditions from net-proton and net-charge fluctuations at RHIC journal November 2014
H Λ 3 and H ‾ Λ ¯ 3 production in Pb–Pb collisions at s NN = 2.76  TeV journal March 2016
Multi-strange baryon production in p Pb collisions at s NN = 5.02   TeV journal July 2016
The thermal proton yield anomaly in Pb-Pb collisions at the LHC and its resolution journal May 2019
H Λ 3 and H ‾ Λ ‾ 3 lifetime measurement in Pb–Pb collisions at s NN = 5.02  TeV via two-body decay journal October 2019
Measurement of the low-energy antitriton inelastic cross section journal January 2024
Properties of hot and dense matter from relativistic heavy ion collisions journal March 2016
Measurement of anti-3He nuclei absorption in matter and impact on their propagation in the Galaxy journal December 2022
Decoding the phase structure of QCD via particle production at high energy journal September 2018
Conservation laws and particle production in heavy ion collisions conference January 2001
Nuclear Cross Sections for 900 MeV Protons journal March 1957
Evidence for chemical equilibration at RHIC journal June 2002
Particle ratios, equilibration and the QCD phase boundary journal June 2002
Strange and multi-strange particle ratios in p+p reactions at GeV at RHIC journal December 2003
Rapidity distributions around mid-rapidity of strange particles in Pb–Pb collisions at 158AGeV/c journal September 2005
Heavy-ion collisions at the LHC—Last call for predictions journal April 2008
The exploration of hot and dense nuclear matter: introduction to relativistic heavy-ion physics journal September 2023
Stopping and Baryon Transport in Heavy Ion Reactions journal November 2006
The ALICE experiment at the CERN LHC journal August 2008
Alignment of the ALICE Inner Tracking System with cosmic-ray tracks journal March 2010
Performance of the ALICE VZERO system journal October 2013
Simple Nuclear Reactions of Indium with 30- and 2.9-GeV Protons journal November 1962
Attenuation Cross Sections for 860-Mev Protons journal August 1955
Canonical statistical model analysis of p − p , p -Pb, and Pb-Pb collisions at energies available at the CERN Large Hadron Collider journal November 2019
Production of charged pions, kaons, and (anti-)protons in Pb-Pb and inelastic p p collisions at s N N = 5.02 TeV journal April 2020
Multiplicity dependence of (multi)strange baryons in the canonical ensemble with phase shift corrections journal January 2021
Light (anti)nuclei production in Pb-Pb collisions at sNN=5.02 TeV journal June 2023
Interaction of 80-164 MeV protons with nickel isotopes journal June 1980
True absorption and scattering of pions on nuclei journal May 1981
Proton + nucleus inclusive (p,p′) scattering at 800 MeV journal January 1984
Thermal phenomenology of hadrons from 200 A GeV S+S collisions journal November 1993
Kaon production in Au+Au collisions at 1 1 . 6 A   GeV / c journal December 1998
Proton and deuteron production in Au+Au reactions at 1 1 . 6 A   GeV / c journal October 1999
Proton and pion production in Au+Au collisions at 1 0 . 8 A GeV/ c journal July 2000
Features of particle multiplicities and strangeness production in central heavy ion collisions between 1 . 7 A and 1 5 8 A   GeV / c journal June 2001
Midrapidity φ production in Au+Au collisions at s NN = 130 GeV journal March 2002
Particle production in central Pb+Pb collisions at 158 A GeV/ c journal October 2002
Energy dependence of pion and kaon production in central Pb+Pb collisions journal November 2002
K * ( 892 ) 0 production in relativistic heavy ion collisions at s NN = 130 GeV journal December 2002
Charged pion production in 2 A to 8 A GeV central Au + Au Collisions journal November 2003
Energy and centrality dependence of deuteron and proton production in Pb + Pb collisions at relativistic energies journal February 2004
Single identified hadron spectra from s N N = 130 GeV Au + Au collisions journal February 2004
Chemical equilibrium study in nucleus-nucleus collisions at relativistic energies journal February 2004
Identified charged particle spectra and yields in Au + Au collisions at s N N = 200 GeV journal March 2004
Production of ϕ mesons in Au + Au collisions at 11.7 A GeV ∕ c journal May 2004
K ( 892 ) * resonance production in Au+Au and p + p collisions at s NN = 200 GeV journal June 2005
Production of ϕ mesons at midrapidity in s NN = 200 GeV Au + Au collisions at relativistic energies journal July 2005
Centrality dependent particle production at y = 0 and y ~ 1 in Au+Au collisions at s NN = 200 GeV journal July 2005
Comparison of chemical freeze-out criteria in heavy-ion collisions journal March 2006
Statistical model predictions for particle ratios at s NN = 5 . 5 TeV journal September 2006
Systematic measurements of identified particle spectra in pp , d + Au , and Au + Au collisions at the STAR detector journal March 2009
Baryon stopping and saturation physics in relativistic collisions journal November 2009
InelasticF17(p,p)F17scattering atEc.m.=3 MeV and theO14(α,p)F17reaction rate journal June 2010
Centrality dependence of π , K , and p production in Pb-Pb collisions at s N N = 2.76 TeV journal October 2013
Production of light nuclei and anti-nuclei in p p and Pb-Pb collisions at energies available at the CERN Large Hadron Collider journal February 2016
Examination of the sensitivity of the thermal fits to heavy-ion hadron yield data to the modeling of the eigenvolume interactions journal April 2017
Bulk properties of the medium produced in relativistic heavy-ion collisions from the beam energy scan program journal October 2017
Finite resonance widths influence the thermal-model description of hadron yields journal September 2018
hijing: A Monte Carlo model for multiple jet production in pp , pA , and AA collisions journal December 1991
Computing quark and gluon distribution functions for very large nuclei journal March 1994
Midrapidity Antiproton-to-Proton Ratio in p p Collisons at s = 0.9 and 7 TeV Measured by the ALICE Experiment journal August 2010
Freeze-Out Conditions in Heavy Ion Collisions from QCD Thermodynamics journal November 2012
QCD Crossover at Finite Chemical Potential from Lattice Simulations journal July 2020
Measurement of the Low-Energy Antideuteron Inelastic Cross Section journal October 2020
Hypertriton Production in p -Pb Collisions at sNN=5.02  TeV journal June 2022
Measurement of the Lifetime and Λ Separation Energy of HΛ3 journal September 2023
Multinucleon Removal Induced by High-Energy Protons journal September 1975
Absorption and Forward Scattering of Antiprotons by C, Al, and Cu Nuclei in the Region 470-880 MeV/ c journal February 1984
Antiproton Production in A u + A u Collisions at 11.7 A GeV / c journal September 1998
Unified Description of Freeze-Out Parameters in Relativistic Heavy Ion Collisions journal December 1998
Baryon Rapidity Loss in Relativistic A u + A u Collisions journal March 2001
Midrapidity Antiproton-to-Proton Ratio from A u + A u Collisions at s NN = 130 GeV journal May 2001
Rapidity Dependence of Antiproton-to-Proton Ratios inAu+AuCollisions atsNN=130GeV journal August 2001
Λ Spectra in 11.6 A GeV / c Au-Au Collisions journal January 2002
Longitudinal Flow of Protons from ( 2 – 8 ) A GeV Central A u + A u Collisions journal February 2002
Centrality Dependence of π + / − , K + / − , p , and p ¯ Production from s NN = 130 GeV Au + Au Collisions at RHIC journal May 2002
Measurement of Λ and Λ ¯ Particles in A u + A u Collisions at s N N = 130     G e V journal August 2002
Erratum: Midrapidity Antiproton-to-Proton Ratio fromAu+AuCollisions atsNN=130  GeV[Phys. Rev. Lett. 86, 4778 (2001)] journal March 2003
Near-Threshold Production of the Multistrange Ξ − Hyperon journal November 2003
Identified Particle Distributions in p p and Au + Au Collisions at s N N = 200     GeV journal March 2004
Multistrange Baryon Production in Au-Au Collisions at s N N = 130     GeV journal May 2004
Λ and Λ ¯ Production in Central Pb-Pb Collisions at 40, 80, and 158 A     G e V journal July 2004
Deuteron and Antideuteron Production in Au + Au Collisions at s N N = 200     GeV journal April 2005
Ω − and Ω ¯ + Production in Central Pb + Pb collisions at 40 and 158 A     GeV journal May 2005
Baryon stopping as a relativistic Markov process in phase space journal September 2020
Colloquium : Phase diagram of strongly interacting matter journal July 2009
Strongly coupled quark-gluon plasma in heavy ion collisions journal July 2017
Mid-rapidity anti-baryon to baryon ratios in pp collisions at $\sqrt{s} = 0.9,\ 2.76\mbox{ and }7\mbox{ TeV}$ measured by ALICE journal July 2013
The Roofit Toolkit for data Modeling conference January 2012
Performance of the ALICE experiment at the CERN LHC journal September 2014
Heavy Ion Collisions: The Big Picture and the Big Questions journal October 2018
Excitation Function and Yield for 97Ru Production in 99Tc(p,3n)97Ru Reaction in 20 - 100 MeV Proton Energy Range journal February 1992
journal January 2012
Hadron Yields in Central Nucleus–Nucleus Collisions, the Statistical Hadronization Model and the QCD Phase Diagram journal January 2021

Similar Records

Measurement of the Centrality Dependence of the Dijet Yield in p + Pb Collisions at s NN = 8.16 TeV with the ATLAS Detector
Journal Article · Wed Mar 06 23:00:00 EST 2024 · Physical Review Letters · OSTI ID:2345952

Observation of Medium-Induced Yield Enhancement and Acoplanarity Broadening of Low- p T Jets from Measurements in p p and Central Pb-Pb Collisions at s NN = 5.02 TeV
Journal Article · Mon Jul 08 20:00:00 EDT 2024 · Physical Review Letters · OSTI ID:2396391

Search for Narrow Trijet Resonances in Proton-Proton Collisions at s = 13 TeV
Journal Article · Tue Jul 02 20:00:00 EDT 2024 · Physical Review Letters · OSTI ID:2391025

Related Subjects