Search for Resonances in the Photoproduction of Proton-Antiproton Pairs

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Results are reported on the reaction {gamma}p {yields} p{bar p}p with beam energy in the range 4.8-5.5 GeV. The data were collected at the Thomas Jefferson National Accelerator Facility in CLAS experiment E01-017(G6C). The focus of this study is an understanding of the mechanisms of photoproduction of proton-antiproton pairs, and to search for intermediate resonances, both narrow and broad, which decay to p{bar p}. The total measured cross section in the photon energy range 4.8-5.5 GeV is {sigma} = 33 {+-} 2 nb. Measurement of the cross section as a function of energy is provided. An upper limit on the ... continued below

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Stokes, Burnham June 30, 2006.

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Results are reported on the reaction {gamma}p {yields} p{bar p}p with beam energy in the range 4.8-5.5 GeV. The data were collected at the Thomas Jefferson National Accelerator Facility in CLAS experiment E01-017(G6C). The focus of this study is an understanding of the mechanisms of photoproduction of proton-antiproton pairs, and to search for intermediate resonances, both narrow and broad, which decay to p{bar p}. The total measured cross section in the photon energy range 4.8-5.5 GeV is {sigma} = 33 {+-} 2 nb. Measurement of the cross section as a function of energy is provided. An upper limit on the production of a narrow resonance state previously observed with a mass of 2.02 GeV/c{sup 2} is placed at 0.35 nb. No intermediate resonance states were observed. Meson exchange production appears to dominate the production of the proton-antiproton pairs.

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  • Report No.: JLAB-PHY-06-645
  • Report No.: DOE/OR/23177-2016
  • Grant Number: AC05-06OR23177
  • DOI: 10.2172/1035480 | External Link
  • Office of Scientific & Technical Information Report Number: 1035480
  • Archival Resource Key: ark:/67531/metadc837227

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  • June 30, 2006

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  • May 19, 2016, 3:16 p.m.

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  • Aug. 3, 2016, 7 p.m.

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Stokes, Burnham. Search for Resonances in the Photoproduction of Proton-Antiproton Pairs, thesis or dissertation, June 30, 2006; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc837227/: accessed December 11, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.