Resonance production in. gamma gamma. collisions
The processes ..gamma gamma.. ..-->.. hadrons can be depicted as follows. One photon creates a q anti q pair which starts to evolve; the other photon can either (A) make its own q anti q pair and the (q anti q q anti q) system continue to evolve or (B) interact with the quarks of the first pair and lead to a modified (q anti q) system in interaction with C = +1 quantum numbers. A review of the recent theoretical activity concerning resonance production and related problems is given under the following headings: hadronic C = +1 spectroscopy (q anti q, qq anti q anti q, q anti q g, gg, ggg bound states and mixing effects); exclusive ..gamma gamma.. processes (generalities, unitarized Born method, VDM and QCD); total cross section (soft and hard contributions); q/sup 2/ dependence of soft processes (soft/hard separation, 1/sup +- +/ resonances); and polarization effects. (WHK)
- Research Organization:
- Stanford Linear Accelerator Center, CA (USA)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 6045869
- Report Number(s):
- SLAC-PUB-3112; CONF-8304110-2; ON: DE83016444
- Resource Relation:
- Conference: 5. international workshop on photon-photon collisions, Aachen, F.R. Germany, 13 Apr 1983
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PHOTON-PHOTON INTERACTIONS
PARTICLE PRODUCTION
RESONANCE PARTICLES
BOUND STATE
GLUEBALLS
HADRONS
PHOTOPRODUCTION
POLARIZATION
QUARKONIUM
QUARKS
TOTAL CROSS SECTIONS
BASIC INTERACTIONS
CROSS SECTIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
INTERACTIONS
PARTICLE INTERACTIONS
POSTULATED PARTICLES
645202* - High Energy Physics- Particle Interactions & Properties-Theoretical- Electromagnetic Interactions & Properties