Exclusive final states from photon-photon collisions at SPEAR

Technical Report · Fri May 01 04:00:00 EDT 1981

DOI:https://doi.org/10.2172/6182873· OSTI ID:6182873

Burke, D L

Studies of exclusive final states produced by the two-photon process have been made at SPEAR by the Mark II and by the Crystal Ball Collaborations. Measurements of ..pi../sup +/..pi../sup -/ and ..pi../sup 0/..pi../sup 0/ production in the mass region 500 MeV/c/sup 2/ < m/sub ..pi pi../ < 2000 MeV/c/sup 2/ are presented. These data include strong signals from the well-known f(1270) meson. The A/sub 2/(1310) has been observed via its ..pi../sup 0/ eta decay mode and its partial width to ..gamma gamma.. has been determined. A measurement of the cross section for the reaction ..gamma gamma.. ..-->.. ..pi../sup +/..pi../sup -/..pi../sup +/..pi../sup -/ is reported. This channel is found to be small just above the four pion threshold, but exhibits a large enhancement near the rho/sup 0/rho/sup 0/ threshold.

• Research Organization: Stanford Linear Accelerator Center, CA (USA)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 6182873
• Report Number(s): SLAC-PUB-2745; ON: DE81028782
• Country of Publication: United States
• Language: English

Related Subjects

645101* -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Electromagnetic Interactions &amp; Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BOSONS
CROSS SECTIONS
DATA
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXCLUSIVE INTERACTIONS
EXPERIMENTAL DATA
GEV RANGE
GEV RANGE 01-10
HADRONS
INFORMATION
INTERACTIONS
MESONS
MEV RANGE
MEV RANGE 100-1000
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHOTON-PHOTON INTERACTIONS
PHOTOPRODUCTION
PIONS
PIONS MINUS
PIONS NEUTRAL
PIONS PLUS
PSEUDOSCALAR MESONS