Color transparency and pion valence quark distributions from di-jet events in Fermilab E791

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Diffractive, exclusive di-jet events produced by 500 GeV/c {pi}{sup {minus}} scattered off nuclei were used to measure their A-dependence, and to make the first direct measurement of the valence-quark momentum distribution in pions. Data on the latter are compared to two limiting predictions for the pion light-cone wave-function. The results show that the asymptotic wave-function of perturbative QCD describes the data well for Q{sup 2} of 10 GeV{sup 2} and above. The measured A-dependence is consistent with observation of point-like configurations in the pion and color-transparency calculations.

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123 Kilobytes pages

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Appel, Jeffrey A. October 10, 2000.

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Diffractive, exclusive di-jet events produced by 500 GeV/c {pi}{sup {minus}} scattered off nuclei were used to measure their A-dependence, and to make the first direct measurement of the valence-quark momentum distribution in pions. Data on the latter are compared to two limiting predictions for the pion light-cone wave-function. The results show that the asymptotic wave-function of perturbative QCD describes the data well for Q{sup 2} of 10 GeV{sup 2} and above. The measured A-dependence is consistent with observation of point-like configurations in the pion and color-transparency calculations.

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123 Kilobytes pages

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  • ICHEP-2000, Osaka (JP), 07/27/2000--08/02/2000

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  • Report No.: FERMILAB-Conf-00/226-E
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 765030
  • Archival Resource Key: ark:/67531/metadc718814

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  • October 10, 2000

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  • Sept. 29, 2015, 5:31 a.m.

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  • April 1, 2016, 3:45 p.m.

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Appel, Jeffrey A. Color transparency and pion valence quark distributions from di-jet events in Fermilab E791, article, October 10, 2000; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc718814/: accessed October 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.