[ital [bar d]] over [ital [bar u]] asymmetry in a proton and Drell-Yan processes

Journal Article · Thu Apr 01 00:00:00 EST 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.47.2697· OSTI ID:6709530

Hwang, W P ^[1]; Garvey, G T; Moss, J M; Peng, J ^[2]

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1. Department of Physics, National Taiwan University, Taipei, Taiwan 10764 (Taiwan, Province of China)
2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

We investigate the extent to which Drell-Yan processes may be used to shed light on the [ital [bar d]] over [ital [bar u]] asymmetry in a proton, as implied by the recent finding of the New Muon Collaboration. To this end, we consider the Drell-Yan production experiment either with an 800 GeV proton beam or with a 200 GeV [pi][sup [plus minus]] or [ital K][sup [plus minus]] beam, readily feasible at Fermilab (as a fixed target experiment). Numerical results indicate that the measurement of the [ital p]/[ital N] (proton-to-nucleon, i.e., normalized proton-to-deuteron) Drell-Yan production cross-section ratio is a suitable choice for unraveling the [ital [bar d]] over [ital [bar u]] asymmetry in a proton. The results also suggest that an experiment with a 200 GeV [pi][sup [minus]] or [ital K][sup [minus]] beam is not suitable for this particular purpose although the calculated ratio differs significantly from unity.

• OSTI ID: 6709530
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 47:7; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
HADRON-HADRON INTERACTIONS
DRELL MODEL
PROTONS
STRUCTURE FUNCTIONS
CROSS SECTIONS
GEV RANGE 100-1000
PARTICLE KINEMATICS
QUANTUM CHROMODYNAMICS
QUARK MODEL
BARYONS
COMPOSITE MODELS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FIELD THEORIES
FUNCTIONS
GEV RANGE
HADRONS
INTERACTIONS
MATHEMATICAL MODELS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE MODELS
QUANTUM FIELD THEORY
662340* - Hadron Interactions- (1992-)
662230 - Quantum Chromodynamics- (1992-)