Neutral pion production in Au plus Au collisions at root s(NN)=200 GeV
The results of midrapidity (0<y<0.8) neutral pion spectra over an extended transverse momentum range (1<p[subscript T]<12 GeV/c) in √(s[subscript NN])=200 GeV Au+Au collisions, measured by the STAR experiment, are presented. The neutral pions are reconstructed from photons measured eith...
| 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/1721.1/52747 https://orcid.org/0000-0002-5515-4563 https://orcid.org/0000-0001-5839-707X https://orcid.org/0000-0002-0031-1963 https://orcid.org/0000-0002-9107-6312 |
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| author | Walker, M. van Nieuwenhuizen, Gerrit Jan Surrow, Bernd Sakuma, Tai Redwine, Robert P. Milner, Richard G. Leight, William Axel Kocoloski, Adam Philip Jones, Christopher LaDon Hoffman, A. M. Corliss, Ross Cameron Betancourt, Michael Joseph Balewski, Jan T. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Walker, M. van Nieuwenhuizen, Gerrit Jan Surrow, Bernd Sakuma, Tai Redwine, Robert P. Milner, Richard G. Leight, William Axel Kocoloski, Adam Philip Jones, Christopher LaDon Hoffman, A. M. Corliss, Ross Cameron Betancourt, Michael Joseph Balewski, Jan T. |
| author_sort | Walker, M. |
| collection | MIT |
| description | The results of midrapidity (0<y<0.8) neutral pion spectra over an extended transverse momentum range (1<p[subscript T]<12 GeV/c) in √(s[subscript NN])=200 GeV Au+Au collisions, measured by the STAR experiment, are presented. The neutral pions are reconstructed from photons measured either by the STAR Barrel Electro-Magnetic Calorimeter or by the Time Projection Chamber via tracking of conversion electron-positron pairs. Our measurements are compared to previously published π[superscript ±] and π[superscript 0] results. The nuclear modification factors R[subscript CP] and R[subscript AA] of π[superscript 0] are also presented as a function of p[subscript T]. In the most central Au+Au collisions, the binary collision scaled π[superscript 0] yield at high p[subscript T] is suppressed by a factor of about 5 compared to the expectation from the yield of p+p collisions. Such a large suppression is in agreement with previous observations for light quark mesons and is consistent with the scenario that partons suffer considerable energy loss in the dense medium formed in central nucleus-nucleus collisions at the Relativistic Heavy Ion Collider. |
| first_indexed | 2024-09-23T11:33:16Z |
| format | Article |
| id | mit-1721.1/52747 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:33:16Z |
| publishDate | 2010 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/527472024-06-28T15:18:11Z Neutral pion production in Au plus Au collisions at root s(NN)=200 GeV Walker, M. van Nieuwenhuizen, Gerrit Jan Surrow, Bernd Sakuma, Tai Redwine, Robert P. Milner, Richard G. Leight, William Axel Kocoloski, Adam Philip Jones, Christopher LaDon Hoffman, A. M. Corliss, Ross Cameron Betancourt, Michael Joseph Balewski, Jan T. Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Department of Physics Surrow, Bernd Walker, M. van Nieuwenhuizen, Gerrit Jan Surrow, Bernd Sakuma, Tai Redwine, Robert P. Milner, Richard G. Leight, William Axel Kocoloski, Adam Philip Jones, Christopher LaDon Hoffman, A. M. Corliss, Ross Cameron Betancourt, Michael Joseph Balewski, Jan T. The results of midrapidity (0<y<0.8) neutral pion spectra over an extended transverse momentum range (1<p[subscript T]<12 GeV/c) in √(s[subscript NN])=200 GeV Au+Au collisions, measured by the STAR experiment, are presented. The neutral pions are reconstructed from photons measured either by the STAR Barrel Electro-Magnetic Calorimeter or by the Time Projection Chamber via tracking of conversion electron-positron pairs. Our measurements are compared to previously published π[superscript ±] and π[superscript 0] results. The nuclear modification factors R[subscript CP] and R[subscript AA] of π[superscript 0] are also presented as a function of p[subscript T]. In the most central Au+Au collisions, the binary collision scaled π[superscript 0] yield at high p[subscript T] is suppressed by a factor of about 5 compared to the expectation from the yield of p+p collisions. Such a large suppression is in agreement with previous observations for light quark mesons and is consistent with the scenario that partons suffer considerable energy loss in the dense medium formed in central nucleus-nucleus collisions at the Relativistic Heavy Ion Collider. Rosatom of Russia Russian Ministry of Science and Technology Ministry of Science, Education and Sports of the Republic of Croatia Korea Research Foundation Polish Ministry of Science and Higher Education CSIR of India DST of India DAE of India NOW of the Netherlands FOM of the Netherlands MSMT of the Czech Republic GA of the Czech Republic MoE of China MoST of China CAS of China NNSFC of China Ministry of Education and Science of the Russian Federation FAPESP CNPq of Brazil EPSRC of the United Kingdom Science and Technology Facilities Council, United Kingdom CNRS/IN2P3 of France Deutsche Forschungsgemeinschaft, Germany Alfred P. Sloan Foundation National Science Foundation United States Office of High Energy Physics 2010-03-19T19:47:47Z 2010-03-19T19:47:47Z 2009-10 2009-09 Article http://purl.org/eprint/type/JournalArticle 0556-2813 http://hdl.handle.net/1721.1/52747 STAR Collaboration et al. “Neutral pion production in Au+Au collisions at sNN=200 GeV.” Physical Review C 80.4 (2009): 044905. © 2009 The American Physical Society https://orcid.org/0000-0002-5515-4563 https://orcid.org/0000-0001-5839-707X https://orcid.org/0000-0002-0031-1963 https://orcid.org/0000-0002-9107-6312 en_US http://dx.doi.org/10.1103/PhysRevC.80.044905 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 | Walker, M. van Nieuwenhuizen, Gerrit Jan Surrow, Bernd Sakuma, Tai Redwine, Robert P. Milner, Richard G. Leight, William Axel Kocoloski, Adam Philip Jones, Christopher LaDon Hoffman, A. M. Corliss, Ross Cameron Betancourt, Michael Joseph Balewski, Jan T. Neutral pion production in Au plus Au collisions at root s(NN)=200 GeV |
| title | Neutral pion production in Au plus Au collisions at root s(NN)=200 GeV |
| title_full | Neutral pion production in Au plus Au collisions at root s(NN)=200 GeV |
| title_fullStr | Neutral pion production in Au plus Au collisions at root s(NN)=200 GeV |
| title_full_unstemmed | Neutral pion production in Au plus Au collisions at root s(NN)=200 GeV |
| title_short | Neutral pion production in Au plus Au collisions at root s(NN)=200 GeV |
| title_sort | neutral pion production in au plus au collisions at root s nn 200 gev |
| url | http://hdl.handle.net/1721.1/52747 https://orcid.org/0000-0002-5515-4563 https://orcid.org/0000-0001-5839-707X https://orcid.org/0000-0002-0031-1963 https://orcid.org/0000-0002-9107-6312 |
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