Isolation of flow and nonflow correlations by two- and four-particle cumulant measurements of azimuthal harmonics in √s[subscript NN] = 200 GeV Au+Au collisions
A data-driven method was applied to Au+Au collisions a t√s[subscript NN] = 200 GeV made with the STAR detector at RHIC to isolate pseudorapidity distance Δη-dependent and Δη-independent correlations by using two- and four-particle azimuthal cumulant measurements. We identified a Δη-independent compo...
| Những tác giả chính: | , |
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| Định dạng: | Bài viết |
| Ngôn ngữ: | en_US |
| Được phát hành: |
Elsevier
2015
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| Truy cập trực tuyến: | http://hdl.handle.net/1721.1/97073 https://orcid.org/0000-0002-0816-200X |
| _version_ | 1826188510202167296 |
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| author | Stevens, Justin van Nieuwenhuizen, Gerrit J |
| author2 | Massachusetts Institute of Technology. Laboratory for Nuclear Science |
| author_facet | Massachusetts Institute of Technology. Laboratory for Nuclear Science Stevens, Justin van Nieuwenhuizen, Gerrit J |
| author_sort | Stevens, Justin |
| collection | MIT |
| description | A data-driven method was applied to Au+Au collisions a t√s[subscript NN] = 200 GeV made with the STAR detector at RHIC to isolate pseudorapidity distance Δη-dependent and Δη-independent correlations by using two- and four-particle azimuthal cumulant measurements. We identified a Δη-independent component of the correlation, which is dominated by anisotropic flow and flow fluctuations. It was also found to be independent of η within the measured range of pseudorapidity |η| < 1. In 20–30% central Au+Au collisions, the relative flow fluctuation was found to be 34% ± 2%(stat.) ± 3%(sys.) for particles with transverse momentum [subscript pT] less than 2 GeV/c. The Δη-dependent part, attributed to nonflow correlations, is found to be 5% ± 2%(sys.) relative to the flow of the measured second harmonic cumulant at |Δη| > 0.7. |
| first_indexed | 2024-09-23T08:00:45Z |
| format | Article |
| id | mit-1721.1/97073 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:00:45Z |
| publishDate | 2015 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/970732023-02-26T10:48:24Z Isolation of flow and nonflow correlations by two- and four-particle cumulant measurements of azimuthal harmonics in √s[subscript NN] = 200 GeV Au+Au collisions Stevens, Justin van Nieuwenhuizen, Gerrit J Massachusetts Institute of Technology. Laboratory for Nuclear Science Stevens, Justin van Nieuwenhuizen, Gerrit Jan A data-driven method was applied to Au+Au collisions a t√s[subscript NN] = 200 GeV made with the STAR detector at RHIC to isolate pseudorapidity distance Δη-dependent and Δη-independent correlations by using two- and four-particle azimuthal cumulant measurements. We identified a Δη-independent component of the correlation, which is dominated by anisotropic flow and flow fluctuations. It was also found to be independent of η within the measured range of pseudorapidity |η| < 1. In 20–30% central Au+Au collisions, the relative flow fluctuation was found to be 34% ± 2%(stat.) ± 3%(sys.) for particles with transverse momentum [subscript pT] less than 2 GeV/c. The Δη-dependent part, attributed to nonflow correlations, is found to be 5% ± 2%(sys.) relative to the flow of the measured second harmonic cumulant at |Δη| > 0.7. Brookhaven 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.) 2015-05-26T19:04:59Z 2015-05-26T19:04:59Z 2015-04 2015-02 Article http://purl.org/eprint/type/JournalArticle 03702693 http://hdl.handle.net/1721.1/97073 Abdelwahab, N. M., et al. “Isolation of Flow and Nonflow Correlations by Two- and Four-Particle Cumulant Measurements of Azimuthal Harmonics in √s[subscript NN] = 200 GeV Au+Au Collisions.” Physics Letters B 745 (May 2015): 40–47. https://orcid.org/0000-0002-0816-200X en_US http://dx.doi.org/10.1016/j.physletb.2015.04.033 Physics Letters B Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ application/pdf Elsevier Elsevier |
| spellingShingle | Stevens, Justin van Nieuwenhuizen, Gerrit J Isolation of flow and nonflow correlations by two- and four-particle cumulant measurements of azimuthal harmonics in √s[subscript NN] = 200 GeV Au+Au collisions |
| title | Isolation of flow and nonflow correlations by two- and four-particle cumulant measurements of azimuthal harmonics in √s[subscript NN] = 200 GeV Au+Au collisions |
| title_full | Isolation of flow and nonflow correlations by two- and four-particle cumulant measurements of azimuthal harmonics in √s[subscript NN] = 200 GeV Au+Au collisions |
| title_fullStr | Isolation of flow and nonflow correlations by two- and four-particle cumulant measurements of azimuthal harmonics in √s[subscript NN] = 200 GeV Au+Au collisions |
| title_full_unstemmed | Isolation of flow and nonflow correlations by two- and four-particle cumulant measurements of azimuthal harmonics in √s[subscript NN] = 200 GeV Au+Au collisions |
| title_short | Isolation of flow and nonflow correlations by two- and four-particle cumulant measurements of azimuthal harmonics in √s[subscript NN] = 200 GeV Au+Au collisions |
| title_sort | isolation of flow and nonflow correlations by two and four particle cumulant measurements of azimuthal harmonics in √s subscript nn 200 gev au au collisions |
| url | http://hdl.handle.net/1721.1/97073 https://orcid.org/0000-0002-0816-200X |
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