Beam Energy Dependence of Moments of the Net-Charge Multiplicity Distributions in Au + Au Collisions at RHIC
We report the first measurements of the moments—mean (M), variance (σ[superscript 2]), skewness (S), and kurtosis (κ)—of the net-charge multiplicity distributions at midrapidity in Au + Au collisions at seven energies, ranging from √s[subscript NN] = 7.7 to 200 GeV, as a part of the Beam Energy Scan...
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/91202 https://orcid.org/0000-0002-5515-4563 https://orcid.org/0000-0002-0816-200X |
| _version_ | 1826195034909704192 |
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| author | Balewski, Jan T. Corliss, Ross Hays-Wehle, James Prewitt Leight, William Axel Stevens, Justin van Nieuwenhuizen, Gerrit Jan Walker, M. |
| 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. |
| author_sort | Balewski, Jan T. |
| collection | MIT |
| description | We report the first measurements of the moments—mean (M), variance (σ[superscript 2]), skewness (S), and kurtosis (κ)—of the net-charge multiplicity distributions at midrapidity in Au + Au collisions at seven energies, ranging from √s[subscript NN] = 7.7 to 200 GeV, as a part of the Beam Energy Scan program at RHIC. The moments are related to the thermodynamic susceptibilities of net charge, and are sensitive to the location of the QCD critical point. We compare the products of the moments, σ[superscript 2]/M, Sσ, and κσ[superscript 2], with the expectations from Poisson and negative binomial distributions (NBDs). The Sσ values deviate from the Poisson baseline and are close to the NBD baseline, while the κσ[superscript 2] values tend to lie between the two. Within the present uncertainties, our data do not show nonmonotonic behavior as a function of collision energy. These measurements provide a valuable tool to extract the freeze-out parameters in heavy-ion collisions by comparing with theoretical models. |
| first_indexed | 2024-09-23T10:05:43Z |
| format | Article |
| id | mit-1721.1/91202 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:05:43Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/912022022-09-26T15:40:37Z Beam Energy Dependence of Moments of the Net-Charge Multiplicity Distributions in Au + Au Collisions 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 first measurements of the moments—mean (M), variance (σ[superscript 2]), skewness (S), and kurtosis (κ)—of the net-charge multiplicity distributions at midrapidity in Au + Au collisions at seven energies, ranging from √s[subscript NN] = 7.7 to 200 GeV, as a part of the Beam Energy Scan program at RHIC. The moments are related to the thermodynamic susceptibilities of net charge, and are sensitive to the location of the QCD critical point. We compare the products of the moments, σ[superscript 2]/M, Sσ, and κσ[superscript 2], with the expectations from Poisson and negative binomial distributions (NBDs). The Sσ values deviate from the Poisson baseline and are close to the NBD baseline, while the κσ[superscript 2] values tend to lie between the two. Within the present uncertainties, our data do not show nonmonotonic behavior as a function of collision energy. These measurements provide a valuable tool to extract the freeze-out parameters in heavy-ion collisions by comparing with theoretical models. Brookhaven National Laboratory Lawrence Berkeley National Laboratory United States. Dept. of Energy. Office of Nuclear Physics United States. Dept. of Energy. Office of High Energy Physics National Science Foundation (U.S.) 2014-10-28T18:50:02Z 2014-10-28T18:50:02Z 2014-08 2014-07 Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/91202 Adamczyk, L., J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, J. Alford, et al. “Beam Energy Dependence of Moments of the Net-Charge Multiplicity Distributions in Au + Au Collisions at RHIC.” Physical Review Letters 113, no. 9 (August 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.113.092301 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 |
| spellingShingle | Balewski, Jan T. Corliss, Ross Hays-Wehle, James Prewitt Leight, William Axel Stevens, Justin van Nieuwenhuizen, Gerrit Jan Walker, M. Beam Energy Dependence of Moments of the Net-Charge Multiplicity Distributions in Au + Au Collisions at RHIC |
| title | Beam Energy Dependence of Moments of the Net-Charge Multiplicity Distributions in Au + Au Collisions at RHIC |
| title_full | Beam Energy Dependence of Moments of the Net-Charge Multiplicity Distributions in Au + Au Collisions at RHIC |
| title_fullStr | Beam Energy Dependence of Moments of the Net-Charge Multiplicity Distributions in Au + Au Collisions at RHIC |
| title_full_unstemmed | Beam Energy Dependence of Moments of the Net-Charge Multiplicity Distributions in Au + Au Collisions at RHIC |
| title_short | Beam Energy Dependence of Moments of the Net-Charge Multiplicity Distributions in Au + Au Collisions at RHIC |
| title_sort | beam energy dependence of moments of the net charge multiplicity distributions in au au collisions at rhic |
| url | http://hdl.handle.net/1721.1/91202 https://orcid.org/0000-0002-5515-4563 https://orcid.org/0000-0002-0816-200X |
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