Beam-energy and system-size dependence of dynamical net charge fluctuations
We present measurements of net charge fluctuations in Au+Au collisions at √[subscript s[superscript [NN]]=19.6, 62.4, 130, and 200 GeV, Cu+Cu collisions at √[subscript s[superscript [NN]]=62.4 and 200 GeV, and p+p collisions at √s=200 GeV using the dynamical net charge fluctuations measure ν[subscri...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2010
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| Online Access: | http://hdl.handle.net/1721.1/51857 https://orcid.org/0000-0001-5839-707X |
| _version_ | 1826192483684450304 |
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| author | Sakuma, Tai Miller, M. L. Millane, Julie M. Kocoloski, Adam Philip Jones, Christopher LaDon Balewski, Jan T. Surrow, Bernd Hoffman, Alan Michael |
| author2 | Lincoln Laboratory |
| author_facet | Lincoln Laboratory Sakuma, Tai Miller, M. L. Millane, Julie M. Kocoloski, Adam Philip Jones, Christopher LaDon Balewski, Jan T. Surrow, Bernd Hoffman, Alan Michael |
| author_sort | Sakuma, Tai |
| collection | MIT |
| description | We present measurements of net charge fluctuations in Au+Au collisions at √[subscript s[superscript [NN]]=19.6, 62.4, 130, and 200 GeV, Cu+Cu collisions at √[subscript s[superscript [NN]]=62.4 and 200 GeV, and p+p collisions at √s=200 GeV using the dynamical net charge fluctuations measure ν[subscript +-,dyn]. We observe that the dynamical fluctuations are nonzero at all energies and exhibit a modest dependence on beam energy. A weak system size dependence is also observed. We examine the collision centrality dependence of the net charge fluctuations and find that dynamical net charge fluctuations violate 1/N[subscript ch] scaling but display approximate 1/N[subscript part] scaling. We also study the azimuthal and rapidity dependence of the net charge correlation strength and observe strong dependence on the azimuthal angular range and pseudorapidity widths integrated to measure the correlation. |
| first_indexed | 2024-09-23T09:16:10Z |
| format | Article |
| id | mit-1721.1/51857 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:16:10Z |
| publishDate | 2010 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/518572023-02-26T04:22:43Z Beam-energy and system-size dependence of dynamical net charge fluctuations Sakuma, Tai Miller, M. L. Millane, Julie M. Kocoloski, Adam Philip Jones, Christopher LaDon Balewski, Jan T. Surrow, Bernd Hoffman, Alan Michael Lincoln Laboratory Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Surrow, Bernd Sakuma, Tai Miller, M. L. Millane, Julie M. Kocoloski, Adam Philip Jones, Christopher LaDon Hoffman, A. M. Balewski, Jan T. Surrow, Bernd We present measurements of net charge fluctuations in Au+Au collisions at √[subscript s[superscript [NN]]=19.6, 62.4, 130, and 200 GeV, Cu+Cu collisions at √[subscript s[superscript [NN]]=62.4 and 200 GeV, and p+p collisions at √s=200 GeV using the dynamical net charge fluctuations measure ν[subscript +-,dyn]. We observe that the dynamical fluctuations are nonzero at all energies and exhibit a modest dependence on beam energy. A weak system size dependence is also observed. We examine the collision centrality dependence of the net charge fluctuations and find that dynamical net charge fluctuations violate 1/N[subscript ch] scaling but display approximate 1/N[subscript part] scaling. We also study the azimuthal and rapidity dependence of the net charge correlation strength and observe strong dependence on the azimuthal angular range and pseudorapidity widths integrated to measure the correlation. Korea Science and Engineering Foundation Polish State Committee for Scientific Research Swiss National Science Foundation CSIR of the Government of India DST of the Government of India DAE of the Government of India FOM of the Netherlands GA of the Czech Republic IRP of the Czech Republic MoE of China MoST of China CAS of China NNSFC of China Russian Ministry of Science and Technology FAPESP of Brazil EPSRC of the United Kingdom STFC of the United Kingdom EMN of France RPL of France RA of France CNRS/IN2P3 of France DFG Excellence Cluster EXC153 of Germany Alfred P. Sloan Foundation National Science Foundation Department of Energy Office of High Energy Physics Office of Nuclear Physics 2010-03-01T18:25:15Z 2010-03-01T18:25:15Z 2009-02 2008-07 Article http://purl.org/eprint/type/JournalArticle 0556-2813 http://hdl.handle.net/1721.1/51857 STAR Collaboration et al. “Beam-energy and system-size dependence of dynamical net charge fluctuations.” Physical Review C 79.2 (2009): 024906. © 2009 The American Physical Society https://orcid.org/0000-0001-5839-707X en_US http://dx.doi.org/10.1103/PhysRevC.79.024906 Physical Review C 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 APS |
| spellingShingle | Sakuma, Tai Miller, M. L. Millane, Julie M. Kocoloski, Adam Philip Jones, Christopher LaDon Balewski, Jan T. Surrow, Bernd Hoffman, Alan Michael Beam-energy and system-size dependence of dynamical net charge fluctuations |
| title | Beam-energy and system-size dependence of dynamical net charge fluctuations |
| title_full | Beam-energy and system-size dependence of dynamical net charge fluctuations |
| title_fullStr | Beam-energy and system-size dependence of dynamical net charge fluctuations |
| title_full_unstemmed | Beam-energy and system-size dependence of dynamical net charge fluctuations |
| title_short | Beam-energy and system-size dependence of dynamical net charge fluctuations |
| title_sort | beam energy and system size dependence of dynamical net charge fluctuations |
| url | http://hdl.handle.net/1721.1/51857 https://orcid.org/0000-0001-5839-707X |
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