Observation of pi+pi-pi+pi- photoproduction in ultraperipheral heavy-ion collisions at [sqrt]sNN=200 GeV at the STAR detector
We present a measurement of pi+pi-pi+pi-photonuclear production in ultraperipheral Au-Au collisions at [sqrt]sNN=200 GeV from the STAR experiment. The pi+pi-pi+pi- final states are observed at low transverse momentum and are accompanied by mutual nuclear excitation of the beam particles. The strong...
| Main Authors: | , , , , , , , , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2010
|
| Online Access: | http://hdl.handle.net/1721.1/57489 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 |
| _version_ | 1826193174830252032 |
|---|---|
| author | Surrow, Bernd Balewski, Jan T. Betancourt, Michael Joseph Corliss, Ross Cameron Hays-Wehle, James Prewitt Jones, Christopher LaDon Kocoloski, Adam Philip Leight, William Axel Sakuma, Tai Seele, Joseph Patrick Hoffman, Alan Michael Milner, Richard G Redwine, Robert P van Nieuwenhuizen, Gerrit J Walker, Matthew H |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Surrow, Bernd Balewski, Jan T. Betancourt, Michael Joseph Corliss, Ross Cameron Hays-Wehle, James Prewitt Jones, Christopher LaDon Kocoloski, Adam Philip Leight, William Axel Sakuma, Tai Seele, Joseph Patrick Hoffman, Alan Michael Milner, Richard G Redwine, Robert P van Nieuwenhuizen, Gerrit J Walker, Matthew H |
| author_sort | Surrow, Bernd |
| collection | MIT |
| description | We present a measurement of pi+pi-pi+pi-photonuclear production in ultraperipheral Au-Au collisions at [sqrt]sNN=200 GeV from the STAR experiment. The pi+pi-pi+pi- final states are observed at low transverse momentum and are accompanied by mutual nuclear excitation of the beam particles. The strong enhancement of the production cross section at low transverse momentum is consistent with coherent photoproduction. The pi+pi-pi+pi- invariant mass spectrum of the coherent events exhibits a broad peak around 1540±40 MeV/c2 with a width of 570±60 MeV/c2, in agreement with the photoproduction data for the ρ0(1700). We do not observe a corresponding peak in the pi+pi- final state and measure an upper limit for the ratio of the branching fractions of the ρ0(1700) to pi+pi- and pi+pi-pi+pi- of 2.5% at 90% confidence level. The ratio of ρ0(1700) and ρ0(770) coherent production cross sections is measured to be 13.4±0.8stat.±4.4syst.%. |
| first_indexed | 2024-09-23T09:34:53Z |
| format | Article |
| id | mit-1721.1/57489 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:34:53Z |
| publishDate | 2010 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/574892023-02-26T10:42:20Z Observation of pi+pi-pi+pi- photoproduction in ultraperipheral heavy-ion collisions at [sqrt]sNN=200 GeV at the STAR detector Observation of π+π-π+π- photoproduction in ultraperipheral heavy-ion collisions at √sNN=200 GeV at the STAR detector Surrow, Bernd Balewski, Jan T. Betancourt, Michael Joseph Corliss, Ross Cameron Hays-Wehle, James Prewitt Jones, Christopher LaDon Kocoloski, Adam Philip Leight, William Axel Sakuma, Tai Seele, Joseph Patrick Hoffman, Alan Michael Milner, Richard G Redwine, Robert P van Nieuwenhuizen, Gerrit J Walker, Matthew H Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Surrow, Bernd Surrow, Bernd Balewski, Jan T. Betancourt, Michael Joseph Corliss, Ross Cameron Hays-Wehle, James Prewitt Hoffman, A. M. Jones, Christopher LaDon Kocoloski, Adam Philip Leight, William Axel Milner, Richard G. Redwine, Robert P. Sakuma, Tai Seele, Joseph Patrick van Nieuwenhuizen, Gerrit Jan Walker, M. We present a measurement of pi+pi-pi+pi-photonuclear production in ultraperipheral Au-Au collisions at [sqrt]sNN=200 GeV from the STAR experiment. The pi+pi-pi+pi- final states are observed at low transverse momentum and are accompanied by mutual nuclear excitation of the beam particles. The strong enhancement of the production cross section at low transverse momentum is consistent with coherent photoproduction. The pi+pi-pi+pi- invariant mass spectrum of the coherent events exhibits a broad peak around 1540±40 MeV/c2 with a width of 570±60 MeV/c2, in agreement with the photoproduction data for the ρ0(1700). We do not observe a corresponding peak in the pi+pi- final state and measure an upper limit for the ratio of the branching fractions of the ρ0(1700) to pi+pi- and pi+pi-pi+pi- of 2.5% at 90% confidence level. The ratio of ρ0(1700) and ρ0(770) coherent production cross sections is measured to be 13.4±0.8stat.±4.4syst.%. United States Department of Energy National Science Foundation Alfred P. Sloan Foundation DFG Excellence Cluster Institut National de Physique Nucleaire et Physique des Particules/CNRS EPSRC of the United Kingdom FAPESP of Brazil Ministry of Education and Science of the Russian Federation National Natural Science Foundation of China Chinese Academy of Sciences MoST of China MoE of China GA of the Czech Republic MSMT of the Czech Republic FOM of the Netherlands NWO of the Netherlands DAE of the Government of India DST of the Government of India Council of Scientific and Industrial Research of India Polish Ministry of Science and Higher Education Korea Research Foundation Ministry of Science, Education and Sports of the Republic of Croatia Russian Ministry of Science and Technology RosAtom of Russia 2010-08-10T20:21:40Z 2010-08-10T20:21:40Z 2010-04 2009-12 Article http://purl.org/eprint/type/JournalArticle 0556-2813 http://hdl.handle.net/1721.1/57489 STAR Collaboration et al. “Observation of pi + pi - pi + pi - photoproduction in ultraperipheral heavy-ion collisions at sNN=200 GeV at the STAR detector.” Physical Review C 81.4 (2010): 044901. © 2010 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.81.044901 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 | Surrow, Bernd Balewski, Jan T. Betancourt, Michael Joseph Corliss, Ross Cameron Hays-Wehle, James Prewitt Jones, Christopher LaDon Kocoloski, Adam Philip Leight, William Axel Sakuma, Tai Seele, Joseph Patrick Hoffman, Alan Michael Milner, Richard G Redwine, Robert P van Nieuwenhuizen, Gerrit J Walker, Matthew H Observation of pi+pi-pi+pi- photoproduction in ultraperipheral heavy-ion collisions at [sqrt]sNN=200 GeV at the STAR detector |
| title | Observation of pi+pi-pi+pi- photoproduction in ultraperipheral heavy-ion collisions at [sqrt]sNN=200 GeV at the STAR detector |
| title_full | Observation of pi+pi-pi+pi- photoproduction in ultraperipheral heavy-ion collisions at [sqrt]sNN=200 GeV at the STAR detector |
| title_fullStr | Observation of pi+pi-pi+pi- photoproduction in ultraperipheral heavy-ion collisions at [sqrt]sNN=200 GeV at the STAR detector |
| title_full_unstemmed | Observation of pi+pi-pi+pi- photoproduction in ultraperipheral heavy-ion collisions at [sqrt]sNN=200 GeV at the STAR detector |
| title_short | Observation of pi+pi-pi+pi- photoproduction in ultraperipheral heavy-ion collisions at [sqrt]sNN=200 GeV at the STAR detector |
| title_sort | observation of pi pi pi pi photoproduction in ultraperipheral heavy ion collisions at sqrt snn 200 gev at the star detector |
| url | http://hdl.handle.net/1721.1/57489 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 |
| work_keys_str_mv | AT surrowbernd observationofpipipipiphotoproductioninultraperipheralheavyioncollisionsatsqrtsnn200gevatthestardetector AT balewskijant observationofpipipipiphotoproductioninultraperipheralheavyioncollisionsatsqrtsnn200gevatthestardetector AT betancourtmichaeljoseph observationofpipipipiphotoproductioninultraperipheralheavyioncollisionsatsqrtsnn200gevatthestardetector AT corlissrosscameron observationofpipipipiphotoproductioninultraperipheralheavyioncollisionsatsqrtsnn200gevatthestardetector AT hayswehlejamesprewitt observationofpipipipiphotoproductioninultraperipheralheavyioncollisionsatsqrtsnn200gevatthestardetector AT joneschristopherladon observationofpipipipiphotoproductioninultraperipheralheavyioncollisionsatsqrtsnn200gevatthestardetector AT kocoloskiadamphilip observationofpipipipiphotoproductioninultraperipheralheavyioncollisionsatsqrtsnn200gevatthestardetector AT leightwilliamaxel observationofpipipipiphotoproductioninultraperipheralheavyioncollisionsatsqrtsnn200gevatthestardetector AT sakumatai observationofpipipipiphotoproductioninultraperipheralheavyioncollisionsatsqrtsnn200gevatthestardetector AT seelejosephpatrick observationofpipipipiphotoproductioninultraperipheralheavyioncollisionsatsqrtsnn200gevatthestardetector AT hoffmanalanmichael observationofpipipipiphotoproductioninultraperipheralheavyioncollisionsatsqrtsnn200gevatthestardetector AT milnerrichardg observationofpipipipiphotoproductioninultraperipheralheavyioncollisionsatsqrtsnn200gevatthestardetector AT redwinerobertp observationofpipipipiphotoproductioninultraperipheralheavyioncollisionsatsqrtsnn200gevatthestardetector AT vannieuwenhuizengerritj observationofpipipipiphotoproductioninultraperipheralheavyioncollisionsatsqrtsnn200gevatthestardetector AT walkermatthewh observationofpipipipiphotoproductioninultraperipheralheavyioncollisionsatsqrtsnn200gevatthestardetector AT surrowbernd observationofppppphotoproductioninultraperipheralheavyioncollisionsatsnn200gevatthestardetector AT balewskijant observationofppppphotoproductioninultraperipheralheavyioncollisionsatsnn200gevatthestardetector AT betancourtmichaeljoseph observationofppppphotoproductioninultraperipheralheavyioncollisionsatsnn200gevatthestardetector AT corlissrosscameron observationofppppphotoproductioninultraperipheralheavyioncollisionsatsnn200gevatthestardetector AT hayswehlejamesprewitt observationofppppphotoproductioninultraperipheralheavyioncollisionsatsnn200gevatthestardetector AT joneschristopherladon observationofppppphotoproductioninultraperipheralheavyioncollisionsatsnn200gevatthestardetector AT kocoloskiadamphilip observationofppppphotoproductioninultraperipheralheavyioncollisionsatsnn200gevatthestardetector AT leightwilliamaxel observationofppppphotoproductioninultraperipheralheavyioncollisionsatsnn200gevatthestardetector AT sakumatai observationofppppphotoproductioninultraperipheralheavyioncollisionsatsnn200gevatthestardetector AT seelejosephpatrick observationofppppphotoproductioninultraperipheralheavyioncollisionsatsnn200gevatthestardetector AT hoffmanalanmichael observationofppppphotoproductioninultraperipheralheavyioncollisionsatsnn200gevatthestardetector AT milnerrichardg observationofppppphotoproductioninultraperipheralheavyioncollisionsatsnn200gevatthestardetector AT redwinerobertp observationofppppphotoproductioninultraperipheralheavyioncollisionsatsnn200gevatthestardetector AT vannieuwenhuizengerritj observationofppppphotoproductioninultraperipheralheavyioncollisionsatsnn200gevatthestardetector AT walkermatthewh observationofppppphotoproductioninultraperipheralheavyioncollisionsatsnn200gevatthestardetector |