Parton distributions from the nuclear physics perspective

Journal Article · Wed May 10 04:00:00 EDT 1995 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.48173· OSTI ID:165646

Hwang, W P ^[1]

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1. Department of Physics, National Taiwan University, Taipei, Taiwan 10764 (Taiwan, Province of China)

In deep inelastic scattering by charged leptons, the generalized Sullivan processes, in which the virtual photon may strike and smash the meson in the cloud (or the recoiling baryon in the core), may contribute to cross sections. Recently, Hwang, Speth, and Brown have suggested that the sea quark distributions of a hadron, at low and moderate {ital Q}{sup 2} (at least up to a few GeV{sup 2}), may be attributed primarily to generalized Sullivan processes. Apart from the result that the general characteristics of the various sea quark distributions, including the strengths and shapes, can be understood, the conjecture also allows for a simple interpretation of the recent finding by the New Muon Collaboration on the violation of the Gottfried sum rule [including the shape of {ital F}{sup {ital p}}{sub 2}({ital x})--{ital F}{sup {ital n}}{sub 2}({ital x}) as a function of {ital x}], as well as that of the so-called ``proton spin crisis`` as caused by the observation by the European Muon Collaboration. To offer further tests of the conjecture, we mention that Drell-Yan processes and semi-inclusive {Lambda} production may also be employed. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

• Sponsoring Organization: USDOE
• OSTI ID: 165646
• Report Number(s): CONF-9405132--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 334; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
DISTRIBUTION FUNCTIONS
HADRONS
PARTON MODEL
SPIN
STRUCTURE FUNCTIONS
SUM RULES