Energy Dependence of Moments of Net-Proton Multiplicity Distributions at RHIC

We report the beam energy (√s[subscript NN] = 7.7–200  GeV) and collision centrality dependence of the mean (M), standard deviation (σ), skewness (S), and kurtosis (κ) of the net-proton multiplicity distributions in Au + Au collisions. The measurements are carried out by the STAR experiment at midra...

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Main Authors: Balewski, Jan T., Corliss, Ross, Hays-Wehle, James Prewitt, Leight, William Axel, Stevens, Justin, van Nieuwenhuizen, Gerrit Jan, Walker, M.
Other Authors: Massachusetts Institute of Technology. Laboratory for Nuclear Science
Format: Article
Language:en_US
Published: American Physical Society 2014
Online Access:http://hdl.handle.net/1721.1/85077
https://orcid.org/0000-0002-5515-4563
https://orcid.org/0000-0002-0816-200X
id mit1721.1-85077
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spelling mit1721.1-850772019-09-12T19:43:00Z Energy Dependence of Moments of Net-Proton Multiplicity Distributions at RHIC Balewski, Jan T. Corliss, Ross Hays-Wehle, James Prewitt Leight, William Axel Stevens, Justin van Nieuwenhuizen, Gerrit Jan Walker, M. Massachusetts Institute of Technology. Laboratory for Nuclear Science Balewski, Jan T. Corliss, Ross Hays-Wehle, James Prewitt Leight, William Axel Stevens, Justin van Nieuwenhuizen, Gerrit Jan Walker, M. We report the beam energy (√s[subscript NN] = 7.7–200  GeV) and collision centrality dependence of the mean (M), standard deviation (σ), skewness (S), and kurtosis (κ) 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< p[subscript T] < 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 phase diagram. The products of the moments, S[subscript σ] and κ[subscript σ][superscript 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 antiproton 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. United States. Dept. of Energy. High Energy Physics Division United States. Dept. of Energy. Office of Nuclear Physics National Science Foundation (U.S.) 2014-02-24T17:56:21Z 2014-02-24T17:56:21Z 2014-01 2013-09 Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/85077 Adamczyk, L., J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, J. Alford, et al. “Energy Dependence of Moments of Net-Proton Multiplicity Distributions at RHIC.” Physical Review Letters 112, no. 3 (January 2014). © 2014 American Physical Society https://orcid.org/0000-0002-5515-4563 https://orcid.org/0000-0002-0816-200X en_US http://dx.doi.org/10.1103/PhysRevLett.112.032302 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society American Physical Society
institution DSpace@MIT
collection DSpace
language en_US
description We report the beam energy (√s[subscript NN] = 7.7–200  GeV) and collision centrality dependence of the mean (M), standard deviation (σ), skewness (S), and kurtosis (κ) 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< p[subscript T] < 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 phase diagram. The products of the moments, S[subscript σ] and κ[subscript σ][superscript 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 antiproton 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.
author2 Massachusetts Institute of Technology. Laboratory for Nuclear Science
author_facet Massachusetts Institute of Technology. Laboratory for Nuclear Science
Balewski, Jan T.
Corliss, Ross
Hays-Wehle, James Prewitt
Leight, William Axel
Stevens, Justin
van Nieuwenhuizen, Gerrit Jan
Walker, M.
format Article
author Balewski, Jan T.
Corliss, Ross
Hays-Wehle, James Prewitt
Leight, William Axel
Stevens, Justin
van Nieuwenhuizen, Gerrit Jan
Walker, M.
spellingShingle Balewski, Jan T.
Corliss, Ross
Hays-Wehle, James Prewitt
Leight, William Axel
Stevens, Justin
van Nieuwenhuizen, Gerrit Jan
Walker, M.
Energy Dependence of Moments of Net-Proton Multiplicity Distributions at RHIC
author_sort Balewski, Jan T.
title Energy Dependence of Moments of Net-Proton Multiplicity Distributions at RHIC
title_short Energy Dependence of Moments of Net-Proton Multiplicity Distributions at RHIC
title_full Energy Dependence of Moments of Net-Proton Multiplicity Distributions at RHIC
title_fullStr Energy Dependence of Moments of Net-Proton Multiplicity Distributions at RHIC
title_full_unstemmed Energy Dependence of Moments of Net-Proton Multiplicity Distributions at RHIC
title_sort energy dependence of moments of net-proton multiplicity distributions at rhic
publisher American Physical Society
publishDate 2014
url http://hdl.handle.net/1721.1/85077
https://orcid.org/0000-0002-5515-4563
https://orcid.org/0000-0002-0816-200X
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score 14.09242

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