Experimental evidence for simple relations between unpolarized and polarized parton distributions

Journal Article · Wed Mar 01 00:00:00 EST 1995 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.51.2108· OSTI ID:6578241

Bourrely, C; Soffer, J ^[1]

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1. Centre de Physique Theorique, Centre National de la Recherche Scientifique, Luminy, Case 907, F-13288, Marseille Cedex 9 (France)

The Pauli exclusion principle is advocated for constructing the proton and neutron deep inelastic structure functions in terms of Fermi-Dirac distributions that we parametrize with very few parameters. It allows a fair description of the recent NMC data on [ital F][sub 2][sup [ital p]]([ital x],[ital Q][sup 2]) and [ital F][sub 2][sup [ital n]]([ital x],[ital Q][sup 2]) at [ital Q][sup 2]=4 GeV[sup 2], as well as the CCFR neutrino data at [ital Q][sup 2]=3 and 5 GeV[sup 2]. We also made some reasonable and simple assumptions to relate unpolarized and polarized quark parton distributions and we obtain, with no additional free parameters, the spin-dependent structure functions [ital xg][sub 1][sup [ital p]]([ital x],[ital Q][sup 2]) and [ital xg][sub 1][sup [ital n]]([ital x],[ital Q][sup 2]). Using the correct [ital Q][sup 2] evolution, we have checked that they are in excellent agreement with the very recent SMC proton data at [ital Q][sup 2]=10 GeV[sup 2] and the SLAC neutron data at [ital Q][sup 2]=2 GeV[sup 2].

• OSTI ID: 6578241
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 51:5; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
NEUTRONS
STRUCTURE FUNCTIONS
PARTONS
DISTRIBUTION
PROTONS
DEEP INELASTIC SCATTERING
ELECTRON REACTIONS
MOMENTUM TRANSFER
MUON REACTIONS
PAULI PRINCIPLE
QUARKS
SUM RULES
BARYONS
CHARGED-PARTICLE REACTIONS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FUNCTIONS
HADRONS
INELASTIC SCATTERING
INTERACTIONS
LEPTON REACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
NUCLEAR REACTIONS
NUCLEONS
PARTICLE INTERACTIONS
POSTULATED PARTICLES
SCATTERING
662330* - Photon & Charged-Lepton Interactions with Hadrons- (1992)
662130 - General Theory of Particles & Fields- S-Matrix Theory
Relativistic Scattering Theory- (1992-)
663300 - Nuclear Reactions & Scattering
General- (1992-)