Abstract
The reactione +e−→e +e− A2 (1320) has been observed by detecting the decayA 2→π+,π-π0. The two-photon width of theA 2 has been measured to be Г(A 2→γγ)=(0.09±0.27 (stat)±0.16 (syst)) keV. The cross section σ(γ γ→π+,π-π0 has been determined outside theA 2 resonance region.
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Supported by the Deutsches Bundesministerium für Forschung und Technologie
Supported by the UK Science and Engineering Research Council
Supported by CAICYT
Supported by the Minerva Gesellschaft für Forschung mbH
Supported by the US Department of Energy contract DEAC02-76ER00881 and the US National Science foundation grant number INT-8313994 for travel
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TASSO Collaboration., Althoff, M., Braunschweig, W. et al. Measurement of the radiative width of theA 2(1320) in two-photon interactions. Z. Phys. C - Particles and Fields 31, 537–543 (1986). https://doi.org/10.1007/BF01551074
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DOI: https://doi.org/10.1007/BF01551074