Energy Dependence of Moments of Net-proton Multiplicity Distributions at RHIC
By S. C. L. Adamczyk, J. K. Adkins, G. Agakishiev, M. Aggarwal, Z. Ahammed, I. Alekseev, J. Alford, C. Anson, A. Aparin, D. Arkhipkin and 344 more. 2013
342 citations recorded by the source corpus.
We report the beam energy (\sqrt s_{NN} = 7.7 - 200 GeV) and collision centrality dependence of the mean (M), standard deviation (\sigma), skewness (S), and kurtosis (\kappa) of the net-proton multiplicity distributions in Au+Au collisions. The measurements are carried out by the STAR experiment at midrapidity (|y|<0.5) and within the transverse momentum range 0.4<pT<0.8 GeV/c in the first phase of the Beam Energy Scan program at the Relativistic Heavy Ion Collider. These measurements are important for understanding the Quantum Chromodynamic (QCD) phase diagram. The products of the moments, S\sigma and \kappa\sigma^{2}, are sensitive to the correlation length of the hot and dense medium created in the collisions and are related to the ratios of baryon number susceptibilities of corresponding orders. The products of moments are found to have values significantly below the Skellam expectation and close to expectations based on independent proton and anti-proton production. The measurements are compared to a transport model calculation to understand the effect of acceptance and baryon number conservation, and also to a hadron resonance gas model.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/b4512a672e13adeef296df2fd842e9fd72fe82db
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In Nuclear and High Energy Physics
Citations in the corpus
- Search for the QCD critical point with fluctuations of conserved quantities in relativistic heavy-ion collisions at RHIC: an overview (2017, methodology): “The STAR experiment has published the energy dependence of cumulants (up to fourth order) of net-proton [101, 106] and net-charge [102] multiplicity distributions in Au?Au collisions at ffiffiffiffiffiffi”
- Properties of hot and dense matter from relativistic heavy ion collisions (2015, methodology): “A first measurement by the STAR collaboration of the beam energy dependence of various cumulant ratios [272] indeed showed a small decrease below the baseline for energies p s < 20 GeV.”