Di-electron spectrum at mid-rapidity in p+p collisions at √s=200 GeV
We report on the mid-rapidity mass spectrum of di-electrons and cross sections of pseudoscalar and vector mesons via e[superscript +]e[superscript −] decays, from √s=200 GeV p+p collisions, measured by the large-acceptance experiment STAR at the Relativistic Heavy Ion Collider. The ratio of the di-e...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2012
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| Online Access: | http://hdl.handle.net/1721.1/74209 https://orcid.org/0000-0002-5515-4563 https://orcid.org/0000-0001-5839-707X https://orcid.org/0000-0002-9107-6312 |
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| author | Balewski, Jan T. Betancourt, Michael Joseph Corliss, Ross Cameron Hays-Wehle, James Prewitt Leight, William Axel Surrow, Bernd Redwine, Robert P Seele, Joseph Patrick Steadman, Stephen G van Nieuwenhuizen, Gerrit J |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Balewski, Jan T. Betancourt, Michael Joseph Corliss, Ross Cameron Hays-Wehle, James Prewitt Leight, William Axel Surrow, Bernd Redwine, Robert P Seele, Joseph Patrick Steadman, Stephen G van Nieuwenhuizen, Gerrit J |
| author_sort | Balewski, Jan T. |
| collection | MIT |
| description | We report on the mid-rapidity mass spectrum of di-electrons and cross sections of pseudoscalar and vector mesons via e[superscript +]e[superscript −] decays, from √s=200 GeV p+p collisions, measured by the large-acceptance experiment STAR at the Relativistic Heavy Ion Collider. The ratio of the di-electron continuum to the combinatorial background is larger than 10% over the entire mass range. Simulations of di-electrons from light-meson decays and heavy-flavor decays (charmonium and open charm correlation) are found to describe the data. The extracted ω→e[superscript +]e[superscript −] invariant yields are consistent with previous measurements. The mid-rapidity yields (d N/dy) of φ and J/ψ are extracted through their di-electron decay channels and are consistent with the previous measurements of φ→K[superscript +]K[superscript −] and J/ψ→e[superscript +]e[superscript −]. Our results suggest a new upper limit of the branching ratio of the η→e[superscript +]e[superscript −] of 1.7×10[superscript −5] at the 90% confidence level. |
| first_indexed | 2024-09-23T09:54:24Z |
| format | Article |
| id | mit-1721.1/74209 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:54:24Z |
| publishDate | 2012 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/742092023-02-26T06:03:31Z Di-electron spectrum at mid-rapidity in p+p collisions at √s=200 GeV Balewski, Jan T. Betancourt, Michael Joseph Corliss, Ross Cameron Hays-Wehle, James Prewitt Leight, William Axel Surrow, Bernd Redwine, Robert P Seele, Joseph Patrick Steadman, Stephen G van Nieuwenhuizen, Gerrit J Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Balewski, Jan T. Betancourt, Michael Joseph Corliss, Ross Cameron Hays-Wehle, James Prewitt Leight, William Axel Redwine, Robert P. Seele, J. Steadman, Stephen G. Surrow, Bernd van Nieuwenhuizen, Gerrit Jan We report on the mid-rapidity mass spectrum of di-electrons and cross sections of pseudoscalar and vector mesons via e[superscript +]e[superscript −] decays, from √s=200 GeV p+p collisions, measured by the large-acceptance experiment STAR at the Relativistic Heavy Ion Collider. The ratio of the di-electron continuum to the combinatorial background is larger than 10% over the entire mass range. Simulations of di-electrons from light-meson decays and heavy-flavor decays (charmonium and open charm correlation) are found to describe the data. The extracted ω→e[superscript +]e[superscript −] invariant yields are consistent with previous measurements. The mid-rapidity yields (d N/dy) of φ and J/ψ are extracted through their di-electron decay channels and are consistent with the previous measurements of φ→K[superscript +]K[superscript −] and J/ψ→e[superscript +]e[superscript −]. Our results suggest a new upper limit of the branching ratio of the η→e[superscript +]e[superscript −] of 1.7×10[superscript −5] at the 90% confidence level. 2012-10-23T15:35:40Z 2012-10-23T15:35:40Z 2012-08 2012-04 Article http://purl.org/eprint/type/JournalArticle 0556-2813 1089-490X http://hdl.handle.net/1721.1/74209 Adamczyk, L. et al. “Di-electron spectrum at mid-rapidity in p+p collisions at √s=200 GeV.” Physical Review C 86.2 (2012). ©2012 American Physical Society https://orcid.org/0000-0002-5515-4563 https://orcid.org/0000-0001-5839-707X https://orcid.org/0000-0002-9107-6312 en_US http://dx.doi.org/10.1103/PhysRevC.86.024906 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 | Balewski, Jan T. Betancourt, Michael Joseph Corliss, Ross Cameron Hays-Wehle, James Prewitt Leight, William Axel Surrow, Bernd Redwine, Robert P Seele, Joseph Patrick Steadman, Stephen G van Nieuwenhuizen, Gerrit J Di-electron spectrum at mid-rapidity in p+p collisions at √s=200 GeV |
| title | Di-electron spectrum at mid-rapidity in p+p collisions at √s=200 GeV |
| title_full | Di-electron spectrum at mid-rapidity in p+p collisions at √s=200 GeV |
| title_fullStr | Di-electron spectrum at mid-rapidity in p+p collisions at √s=200 GeV |
| title_full_unstemmed | Di-electron spectrum at mid-rapidity in p+p collisions at √s=200 GeV |
| title_short | Di-electron spectrum at mid-rapidity in p+p collisions at √s=200 GeV |
| title_sort | di electron spectrum at mid rapidity in p p collisions at √s 200 gev |
| url | http://hdl.handle.net/1721.1/74209 https://orcid.org/0000-0002-5515-4563 https://orcid.org/0000-0001-5839-707X https://orcid.org/0000-0002-9107-6312 |
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