Timelike form factors at high energy

Journal Article · Sun Jan 01 04:00:00 EST 1995 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.51.15· OSTI ID:7063622

Gousset, T ^[1]; Pire, B ^[2]

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1. CEA, DAPNIA/Service de Physique Nucleaire, CE Saclay, 91191 Gif-sur-Yvette (France) Centre de Physique Theorique, Ecole Polytechnique, 91128 Palaiseau (France)
2. Centre de Physique Theorique, Ecole Polytechnique, 91128 Palaiseau (France)

The difference between the timelike and spacelike meson form factors is analyzed in the framework of perturbative QCD with Sudakov effects included. It is found that integrable singularities appear but that the asymptotic behavior is the same in the timelike and spacelike regions. The approach to asymptotia is quite slow and a rather constant enhancement of the timelike value is expected at a measurable large [ital Q][sup 2]. This is in agreement with the trend shown by experimental data.

• OSTI ID: 7063622
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 51:1; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662230 -- Quantum Chromodynamics-- (1992-)
662390* -- Electromagnetic Processes & Properties-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
ELEMENTARY PARTICLES
FIELD THEORIES
FORM FACTORS
HADRONS
MESONS
PARTICLE PROPERTIES
PERTURBATION THEORY
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
SINGULARITY