Q/sup 2/ dependence in exclusive two photon reactions
Thesis/Dissertation
·
OSTI ID:7161925
Calculations of the cross sections for ..gamma../sup */..gamma../sup */ ..-->.. m(antim), two photon production of meson-antimeson, and ..gamma../sup */..gamma../sup */ ..-->.. B(anti-B), two photon production of baryon-antibaryon, are presented for the case in which one or both of the photon is off-shell. The results are shown to be in agreement with the Q/sup 2/ ..-->.. 0 limit for ..gamma gamma.. ..-->.. m(anti-m) calculated by Brodsky and Lepage and for ..gamma gamma.. ..-->.. B(anti-B) calculated by Farrar, Maina, and Neri. It is further shown that Q/sup 2/ dependence, (Q/sup 2/ = -(four momentum of the photon)/sup 2/), provides tests of the applicability and consistency of perturbative QCD and the factorization formalism. In particular, the Q/sup 2/ dependence is sensitive to the choice of distribution amplitude; thus the Chernyak and Zhitnitsy distribution amplitude that is best for fitting the proton form factor at present experimental energies can be tested with an independent process.
- Research Organization:
- California Univ., Davis (USA)
- OSTI ID:
- 7161925
- Country of Publication:
- United States
- Language:
- English
Similar Records
Q/sup 2/ dependence of exclusive baryon-antibaryon production in photon-photon collisions
The asymptotics of the transition form factor {gamma}{gamma}{sup *} {r_arrow} {pi}{sup 0}
Journal Article
·
Fri Oct 31 23:00:00 EST 1986
· Phys. Rev. D; (United States)
·
OSTI ID:7104355
The asymptotics of the transition form factor {gamma}{gamma}{sup *} {r_arrow} {pi}{sup 0}
Conference
·
Thu May 01 00:00:00 EDT 1997
·
OSTI ID:756324
Related Subjects
645101* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
BASIC INTERACTIONS
BOSONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FORM FACTORS
FOUR MOMENTUM TRANSFER
HADRONS
INTERACTIONS
MESONS
MOMENTUM TRANSFER
PAIR PRODUCTION
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PERTURBATION THEORY
PHOTON-PHOTON INTERACTIONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
BASIC INTERACTIONS
BOSONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FORM FACTORS
FOUR MOMENTUM TRANSFER
HADRONS
INTERACTIONS
MESONS
MOMENTUM TRANSFER
PAIR PRODUCTION
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PERTURBATION THEORY
PHOTON-PHOTON INTERACTIONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY