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Two-photon production of charged pion and kaon pairs

Journal Article · · Physical Review, D (Particles Fields); (United States)
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A measurement of the cross section for the combined two-photon production of charged pion and kaon pairs is performed using 1.2 fb[sup [minus]1] of data collected by the CLEO II detector at the Cornell Electron Storage Ring. The cross section is measured at invariant masses of the two-photon system between 1.5 and 5.0 GeV/[ital c][sup 2], and at scattering angles more than 53[degree] away from the [gamma][gamma] collision axis in the [gamma][gamma] center-of-mass frame. The large background of leptonic events is suppressed by utilizing the CsI calorimeter in conjunction with the muon chamber system. The reported cross section is compared with leading order QCD models as well as previous experiments. Although the functional dependence of the measured cross section disagrees with leading order QCD at small values of the two-photon invaraint mass, the data show qualitatively a transition to perturbative behavior at an invariant mass of approximately 2.5 GeV/[ital c][sup 2].
OSTI ID:
6999565
Journal Information:
Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 50:5; ISSN PRVDAQ; ISSN 0556-2821
Country of Publication:
United States
Language:
English

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Related Subjects

662230 -- Quantum Chromodynamics-- (1992-)
662310* -- Weak & Electromagnetic Interactions of Leptons-- (1992-)
662420 -- Properties of Mesons & Meson Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
CHARGED PARTICLES
CROSS SECTIONS
ELEMENTARY PARTICLES
FIELD THEORIES
HADRONS
INTERACTIONS
KAONS
MASSLESS PARTICLES
MESONS
PAIR PRODUCTION
PARTICLE PRODUCTION
PHOTONS
PIONS
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
STRANGE MESONS
STRANGE PARTICLES