New two-photon results from ARGUS

Conference · Sat Feb 01 04:00:00 EST 1992 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:5602208

Kernel, G ^[1]

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1. Institut J. Stefan and Oddelek za fiziko, Univerza v Ljubljani, Jamova 39, SI-61111 Ljubljana (Slovenia)

This paper presents data on two-photon production of a pair of vector mesons, and on resonance production of three pions. Vector pair production was studied in three channels: [gamma][gamma][r arrow][omega][rho], [gamma][gamma][r arrow][rho][phi], and [gamma][gamma][r arrow][omega][phi]. For the first channel also a partial-wave analysis was performed of the reaction [gamma][gamma][r arrow][pi][sup +][pi][sup +][pi][sup [minus]][pi][sup [minus]][pi][sup 0]. The reaction [gamma][gamma][r arrow][rho][phi] was observed for the first time. There is also evidence for the reaction [gamma][gamma][r arrow][omega][phi]. The [gamma][gamma][r arrow][pi][sup +][pi][sup [minus]][pi][sup 0] reaction is dominated by the formation of [alpha][sub 2] in its helicity 2 state. A partial-wave analysis has revealed the [pi][sub 2](1670) state with a two-photon partial width of (0.25[plus minus]0.15) keV which is significantly lower than indicated by previous experiments. There is an indication for an additional peak at 1.8 GeV with a preferred spin-parity assignment 2[sup [minus]].

• OSTI ID: 5602208
• Report Number(s): CONF-920837--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Journal Volume: 272:1
• Country of Publication: United States
• Language: English

Related Subjects

662390* -- Electromagnetic Processes & Properties-- (1992-)
662420 -- Properties of Mesons & Meson Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BOSONS
CALCULATION METHODS
CROSS SECTIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
HADRONS
HELICITY
INTERACTIONS
MASS SPECTRA
MESONS
MONTE CARLO METHOD
PAIR PRODUCTION
PARTIAL WAVES
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PHOTON-PHOTON INTERACTIONS
PIONS
PIONS MINUS
PIONS NEUTRAL
PIONS PLUS
PSEUDOSCALAR MESONS
SPECTRA
VECTOR MESONS