Abstract
In the analysis of the reactione + e −→e + e − K 0 S K 0 s clear evidence for exclusive γγ→f ′2 resonance production is observed. The productΓ γγ ·B(f ′2 →K \(\bar K\)) is measured to be 0.10 +0.04+0.03−0.03−0.02 keV independent of ana priori assumption on the helicity structure. Our data are consistent with a pure helicity 2 contribution and we derive an upper limit for the ratioΓ (0) γγ /Γ γγ. The absence of events in the mass region around 1.3 GeV clearly proves destructivef 2−a 2 interference and allows to measure the relative phases betweenf 2,a 2 andf ′2 . Upper limits on the production of the glueball candidate statesf 2(1720) andX(2230) as well as theK 0S K 0S -continuum are given.
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Deceased
Supported by the BMFT, FRG
Partially supported by the Norwegian Council for Science and the Humanities
Partially supported by I.N.F.N.
Supported by the UK. Science and Engineering Research Council
Partially supported by the Department of Energy, USA
Partially supported by the Israeli Academy of Sciences and Humanities, Basic Research Foundation
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PLUTO Collaboration., Berger, C., Genzel, H. et al. Tensor meson excitation in the reaction γγ→K 0 S K 0 S . Z. Phys. C - Particles and Fields 37, 329–335 (1988). https://doi.org/10.1007/BF01578125
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DOI: https://doi.org/10.1007/BF01578125