Quark model calculations of symmetry breaking in parton distributions

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Description

Using a quark model, we calculate symmetry breaking effects in the valence quark distributions of the nucleon. In particular, we examine the breaking of the quark model SU(4) symmetry by color magnetic effects, and find that color magnetism provides an explanation for deviation of the ratio d{sub v}({chi})/u{sub v}({chi}) from 1/2. Additionally, we calculate the effect of charge symmetry breaking in the valence quark distributions of the proton and neutron and find, in contrast to other authors, that the effect is too small to be seen experimentally.

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6 p.

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Benesh, C.J.; Goldman, J.T. & Stephenson, G.J. September 1, 1995.

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Description

Using a quark model, we calculate symmetry breaking effects in the valence quark distributions of the nucleon. In particular, we examine the breaking of the quark model SU(4) symmetry by color magnetic effects, and find that color magnetism provides an explanation for deviation of the ratio d{sub v}({chi})/u{sub v}({chi}) from 1/2. Additionally, we calculate the effect of charge symmetry breaking in the valence quark distributions of the proton and neutron and find, in contrast to other authors, that the effect is too small to be seen experimentally.

Physical Description

6 p.

Notes

INIS; OSTI as DE96000002

Source

  • International symposium on particle theory and phenomenology, Ames, IA (United States), 22-24 May 1995

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  • Other: DE96000002
  • Report No.: LA-UR--95-2894
  • Report No.: CONF-9505280--3
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/114022 | External Link
  • Office of Scientific & Technical Information Report Number: 114022
  • Archival Resource Key: ark:/67531/metadc626338

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Office of Scientific & Technical Information Technical Reports

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  • September 1, 1995

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Feb. 26, 2016, 3:52 p.m.

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Benesh, C.J.; Goldman, J.T. & Stephenson, G.J. Quark model calculations of symmetry breaking in parton distributions, report, September 1, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc626338/: accessed December 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.