Pion and kaon pair production in photon-photon collisions

Journal Article · Mon Jul 28 00:00:00 EDT 1986 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.57.404· OSTI ID:5647592

Aihara, H; Alston-Garnjost, M; Avery, R E; Barbaro-Galtieri, A; Barker, A R; Barnes, A V; Barnett, B A; Bauer, D A; Bengtsson, H; Bintinger, D L; Blumenfeld, B J; Bobbink, G J; Bross, A D; Buchanan, C D; Buijs, A; Cain, M P; Caldwell, D O; Chamberlain, O; Chien, C; Clark, A R ; Cowan, G D; Crane, D A; Dahl, O I; Derby, K A; Eastman, J J; Eberhard, P H; Eisner, A M; Enomoto, R; Erne-acute-accent, F C; Fujii, T; Gabioud, B; Gary, J W; Gorn, W; Hauptman, J M; Hofmann, W; Huth, J E; Hylen, J; Joshi, U P; Kamae, T; Kaye, H S; Kees, K H; Kenney, R W; Kerth, L T; Ko, W; Koda, R I; Kofler, R R; Kwong, K K; Lander, R L; Langeveld, W G.J.; Layter, J G; Linde, F L; Lindsey, C S; Loken, S C; Lu, A; Lu, X; Lynch, G R; Madaras, R J; Maeshima, K; Magnuson, B D; Marx, J N; Maruyama, K; Masek, G E; Mathis, L G; Matthews, J A.J.; Maxfield, S J; Melnikoff, S O; Miller, E S; Moses, W; McNeil, R R; Nemethy, P; Nygren, D R; Oddone, P J; Pa,

We report measurements of the two-photon processes e-italic/sup +/e/sup -/..-->..e/sup +/e/sup -/..pi../sup +/..pi../sup -/ and e-italic/sup +/e/sup -/..-->..e/sup +/e/sup -/K/sup +/K/sup -/, at an e-italic/sup +/e/sup -/ center-of-mass energy of 29 GeV. In the ..pi../sup +/..pi../sup -/ data a high-statistics analysis of the f-italic(1270) results in a ..gamma gamma.. width GAMMA(..gamma gamma -->..f-italic) = 3.2 +- 0.4 keV. The ..pi../sup +/..pi../sup -/ continuum below the f-italic mass is well described by a QED Born approximation, whereas above the f-italic mass it is consistent with a QCD-model calculation if a large contribution from the f-italic is assumed. For the K-italic/sup +/K/sup -/ data we find agreement of high-mass continuum with the QCD prediction; limits on f-italic'(1520) and t-italich-italice-italict-italica-italic(1720) formation are presented.

• Research Organization: Lawrence Berkeley Laboratory, Berkeley, California 94720; University of California, Davis, California 95616; University of California Institute for Research at Particle Accelerators, Stanford, California 94305; University of California, Los Angeles, California 90024; University of California, Riverside,
• OSTI ID: 5647592
• Journal Information: Phys. Rev. Lett.; (United States), Vol. 57:4
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ELECTRON-POSITRON INTERACTIONS
PAIR PRODUCTION
F-1260 RESONANCES
PARTICLE PRODUCTION
PHOTON-PHOTON INTERACTIONS
ANGULAR DISTRIBUTION
BORN APPROXIMATION
CROSS SECTIONS
GEV RANGE 10-100
KAONS MINUS
KAONS PLUS
PARTICLE WIDTHS
PIONS MINUS
PIONS PLUS
PROJECTION SPARK CHAMBERS
QUANTUM CHROMODYNAMICS
QUANTUM ELECTRODYNAMICS
VECTOR DOMINANCE MODEL
BASIC INTERACTIONS
BOSONS
DISTRIBUTION
ELECTRODYNAMICS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FIELD THEORIES
GAS TRACK DETECTORS
GEV RANGE
HADRONS
INTERACTIONS
KAONS
LEPTON-LEPTON INTERACTIONS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MESONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PIONS
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
RADIATION DETECTORS
SPARK CHAMBERS
STRANGE MESONS
STRANGE PARTICLES
645101* - High Energy Physics- Particle Interactions & Properties-Experimental- Electromagnetic Interactions & Properties