Higher Moments of Net Proton Multiplicity Distributions at RHIC
Creators
- Aggarwal, M. M.1
- Bhati, A. K.1
- Pruthi, N. K.1
- Ahammed, Z.2
- Dong, X.2
- Grebenyuk, O.2
- Hjort, E.2
- Jacobs, P.2
- Kikola, D. P.2
- Kiryluk, J.2
- Klein, S. R.2
- Masui, H.2
- Matis, H. S.2
- Odyniec, G.2
- Olson, D.2
- Ploskon, M. A.2
- Poskanzer, A. M.2
- Powell, C. B.2
- Ritter, H. G.2
- Rose, A.2
- and others
- STAR Collaboration
- 1. Panjab University, Chandigarh 160014 (India)
- 2. Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
Description
We report the first measurements of the kurtosis (κ), skewness (S), and variance (σ2) of net-proton multiplicity (Np-Np) distributions at midrapidity for Au+Au collisions at √(sNN)=19.6, 62.4, and 200 GeV corresponding to baryon chemical potentials (μB) between 200 and 20 MeV. Our measurements of the products κσ2 and Sσ, which can be related to theoretical calculations sensitive to baryon number susceptibilities and long-range correlations, are constant as functions of collision centrality. We compare these products with results from lattice QCD and various models without a critical point and study the √(sNN) dependence of κσ2. From the measurements at the three beam energies, we find no evidence for a critical point in the QCD phase diagram for μB below 200 MeV.
Additional details
Identifiers
- DOI
- 10.1103/PhysRevLett.105.022302;
- arXiv
- arXiv:1004.4959v2;
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 105
- Journal Issue
- 2
- Journal Page Range
- p. 022302-022302.6
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 42004062
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- ASYMMETRY; ATOM COLLISIONS; BARYON NUMBER; BROOKHAVEN RHIC; COMPARATIVE EVALUATIONS; CORRELATIONS; GEV RANGE; GOLD; MEV RANGE; MULTIPLICITY; PARTICLE BEAMS; PHASE DIAGRAMS; POTENTIALS; PROTONS; QUANTUM CHROMODYNAMICS
- Descriptors DEC
- ACCELERATORS; BARYONS; BEAMS; COLLISIONS; DIAGRAMS; ELEMENTARY PARTICLES; ELEMENTS; ENERGY RANGE; EVALUATION; FERMIONS; FIELD THEORIES; HADRONS; HEAVY ION ACCELERATORS; INFORMATION; METALS; NUCLEONS; QUANTUM FIELD THEORY; STORAGE RINGS; TRANSITION ELEMENTS
Optional Information
- Notes
- (c) 2010 The American Physical Society
- Collaborations
- STAR Collaboration