Diffractive leptoproduction of vector mesons in QCD

Journal Article · Thu Sep 01 00:00:00 EDT 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.50.3134· OSTI ID:7142709

Brodsky, S J ^[1]; Frankfurt, L ^[2]; Gunion, J F ^[3]; Mueller, A H ^[4]; Strikman, M ^[5]

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1. Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (United States)
2. School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv 69978 (Israel)
3. Davis Institute for High Energy Physics, Department of Physics, University of California, Davis, California 95616 (United States)
4. Department of Physics, Columbia University, New York, New York 10027 (United States)
5. Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802 (United States)

We demonstrate that the distinctive features of the forward differential cross section of diffractive leptoproduction of a vector meson can be legitimately calculated in perturbative QCD in terms of the light-cone [ital q[bar q]] wave function of the vector meson and the gluon distribution of the target. In particular, we calculate the [ital Q][sup 2] and nuclear dependence of the diffractive leptoproduction of vector mesons and estimate the cross section. The production of longitudinally polarized vector mesons by longitudinally polarized virtual photons is predicted to be the dominant component, yielding a cross section behaving as [ital Q][sup [minus]6]. The nuclear dependence of the diffractive cross sections, which follows from a factorization theorem in perturbative QCD, provides important tests of color transparency as well as constraints on the shadowing of the gluon structure functions and the longitudinal structure functions of nuclei.

• DOE Contract Number: AC03-76SF00515; FG02-93ER40771; FG03-91ER40674
• OSTI ID: 7142709
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 50:5; ISSN 0556-2821; ISSN PRVDAQ
• Country of Publication: United States
• Language: English

Related Subjects

662230 -- Quantum Chromodynamics-- (1992-)
662330* -- Photon & Charged-Lepton Interactions with Hadrons-- (1992)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELEMENTARY PARTICLES
FACTORIZATION
FERMIONS
FIELD THEORIES
FUNCTIONS
GLUONS
HADRONS
LEPTONS
LIGHT CONE
MASSLESS PARTICLES
MESONS
NUCLEI
PARTICLE PRODUCTION
PERTURBATION THEORY
PHOTONS
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
SHADOW EFFECT
SPACE-TIME
STRUCTURE FUNCTIONS
VECTOR MESONS
WAVE FUNCTIONS