Higher moments of net baryon distribution as probes of the QCD critical point

Journal Article · Thu Jul 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.014905· OSTI ID:21389215

Zhou, Y; Shi, S S; Xiao, K; Wu, K J; Liu, F ^[1]

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1. Institute of Particle Physics, HuaZhong Normal University (CCNU), Wuhan 430079 (China) and Key Laboratory of Quark and Lepton Physics, HuaZhong Normal University (CCNU), Ministry of Education, Wuhan 430079 (China)

It is crucially important to find an acceptance and late collision process independent observable in searching for the possible critical point predicted by QCD. By utilizing a multiphase transport (AMPT) model and ultrarelativistic quantum molecular dynamics (UrQMD) model, we study the centrality and evolution time dependence of higher moments of net baryon distribution in Au+Au collisions at sq root(s{sub NN})=17.3 GeV. The results suggest that kurtosis and skewness are less sensitive to the acceptance effect and late collision process. Thus, they should be good observables providing the information on the early stage of a heavy-ion collision. In addition, our study shows that the product of kurtosis times sigma{sup 2} of the net proton distribution is quite different from that of the net baryon distribution when the collision energy is lower than sq root(s{sub NN})=20 GeV, the Monte Carlo calculations on kurtosiscentre dotsigma{sup 2} have a deviation from the theoretical predictions.

• OSTI ID: 21389215
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 1; Other Information: DOI: 10.1103/PhysRevC.82.014905; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASYMMETRY
ATOM-ATOM COLLISIONS
COLLISIONS
DISTRIBUTION
FORECASTING
GEV RANGE 10-100
GOLD
HEAVY ION REACTIONS
MOLECULAR DYNAMICS METHOD
MONTE CARLO METHOD
PROTONS
QUANTUM CHROMODYNAMICS
RELATIVISTIC RANGE
SIMULATION
STATISTICS
TIME DEPENDENCE
TRANSPORT THEORY
ATOM COLLISIONS
BARYONS
CALCULATION METHODS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
FERMIONS
FIELD THEORIES
GEV RANGE
HADRONS
MATHEMATICS
METALS
NUCLEAR REACTIONS
NUCLEONS
QUANTUM FIELD THEORY
TRANSITION ELEMENTS