Sudakov effects in [ital p[bar p]] annihilation

Journal Article · Sat May 01 04:00:00 EDT 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.47.3875· OSTI ID:6645104

Hyer, T ^[1]

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1. Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (United States)

We compute the amplitudes for [ital p[bar p]][r arrow][gamma][gamma] and [ital p[bar p]][r arrow][ital l[bar l]], taking into account the Sudakov suppression resulting from radiation by isolated partons. Results for the two-photon annihilation process and form factor are presented for several candidate proton distribution amplitudes. Results are also presented for the ratio [sigma]([ital p[bar p]][r arrow][gamma][gamma])/[sigma]([ital p[bar p]][r arrow][ital e][sup +][ital e[minus]]), which is free of experimental and theoretical normalization uncertainties. Prospects for using these results to constrain the nucleon distribution amplitude are discussed.

• DOE Contract Number: AC03-76SF00515
• OSTI ID: 6645104
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 47:9; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662230* -- Quantum Chromodynamics-- (1992-)
662340 -- Hadron Interactions-- (1992-)
662390 -- Electromagnetic Processes & Properties-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ANNIHILATION
BARYON-BARYON INTERACTIONS
BASIC INTERACTIONS
BOSONS
CROSS SECTIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRON-HADRON INTERACTIONS
INTERACTIONS
LEPTONS
MASSLESS PARTICLES
NUCLEON-ANTINUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PHOTONS
PROTON-ANTIPROTON INTERACTIONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
SCATTERING AMPLITUDES