First Observation of $\gamma \gamma \to \omega \omega$

The reaction γγ → 2 π + 2 π − 2 π 0 has been studied using the ARGUS detector at the e + e − storage ring DORIS II at DESY. Production of ω mesons is observed and, in particular, the reaction γγ → ωω is seen for the first time. The cross section for γγ → ωω has an enhancement at ∼ 1.9 GeV/ c 2 of about 10 nb. The cross sections for γγ → 2 π + 2 π − 2 π 0 and γγ → ωπ + π − π 0 are also given.

ELECTRON POSITRON: COLLIDING BEAMS
COLLIDING BEAMS: ELECTRON POSITRON
ELECTRON POSITRON: INELASTIC SCATTERING
INELASTIC SCATTERING: ELECTRON POSITRON
EXCHANGE: TWO-PHOTON
TWO-PHOTON: EXCHANGE
PHOTON PHOTON: INTERACTION
INTERACTION: PHOTON PHOTON
OMEGA(783): PAIR PRODUCTION
PAIR PRODUCTION: OMEGA(783)

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Figures(0)

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First Observation of γγ→ωω\gamma \gamma \to \omega \omegaγγ→ωω

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First Observation of $\gamma \gamma \to \omega \omega$