Investigation of color transparency by high transverse momentum pp elastic scattering inside nuclei

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Following a suggestion of Mueller and Brodsky, we have measured (p, 2p) quasielastic scattering in nuclei at 90(degree) CM at momentum transfers of Q/sup 2/ = 4.8, 8.5 and 10.4 (GeV/c)/sup 2/. In a perturbative QCD model of large transverse momentum exclusive reactions, the hadrons which scatter are anomalously ''small,'' and hence have a reduced absorption in nuclear matter over distances comparable to nuclear radii. At sufficiently high momentum, the absorption should vanish completely and lead to complete ''color transparency.'' The absorption of the initial and final state protons as they pass through nuclear matter is determined from the ratio ... continued below

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Pages: 6

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Barton, D.S.; Bunce, G.; Carroll, A.S.; Gushue, S.; Makdisi, Y.I.; Heppelmann, S. et al. January 1, 1989.

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Following a suggestion of Mueller and Brodsky, we have measured (p, 2p) quasielastic scattering in nuclei at 90(degree) CM at momentum transfers of Q/sup 2/ = 4.8, 8.5 and 10.4 (GeV/c)/sup 2/. In a perturbative QCD model of large transverse momentum exclusive reactions, the hadrons which scatter are anomalously ''small,'' and hence have a reduced absorption in nuclear matter over distances comparable to nuclear radii. At sufficiently high momentum, the absorption should vanish completely and lead to complete ''color transparency.'' The absorption of the initial and final state protons as they pass through nuclear matter is determined from the ratio of the differential cross section for elastic scattering from protons in nuclei to that from free protons. The kinematic constraints of the experiment allow a clear extraction of the (p,2p) quasielastic signal, and a good measurement of the target proton momentum spectrum as probed by large momentum transfers. In contrast to a conventional Glauber picture of constant transparency, a striking energy dependence is observed in this experiment. 11 refs., 4 figs.

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Pages: 6

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NTIS, PC A02/MF A01 - OSTI; 1.

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  • 24. Recontres de Moriond: new results in hadronic interactions, Les Arcs, France, 12-18 Mar 1989

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  • Other: DE89015109
  • Report No.: BNL-42856
  • Report No.: CONF-8903143-3
  • Grant Number: AC02-76CH00016
  • Office of Scientific & Technical Information Report Number: 6029818
  • Archival Resource Key: ark:/67531/metadc1101030

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  • January 1, 1989

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  • Feb. 18, 2018, 3:59 p.m.

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  • April 23, 2018, 4:25 p.m.

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Barton, D.S.; Bunce, G.; Carroll, A.S.; Gushue, S.; Makdisi, Y.I.; Heppelmann, S. et al. Investigation of color transparency by high transverse momentum pp elastic scattering inside nuclei, article, January 1, 1989; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc1101030/: accessed August 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.