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[en] The full data set of the experiment NA31 at CERN has been used to analyse the decay mode KL→π0γγ. A signal of 63 events has been observed with an estimated background of 6.0±1.7 events, corresponding to a branching ratio of (1.7±0.3)*10-6. The invariant mass spectrum of the two photons is found to be consistent with chiral perturbation theory, and dominated by the J=0 two-photon state. (author) 12 refs.; 2 figs
Source
Tran Thanh Van, J. (ed.); [650 p.]; ISBN 2-86332-119-6; 
; 1992; p. 177-180; Editions Frontieres; Paris (France); Moriond particle physics meeting; 27. Rencontre de Moriond; Les Arcs, Savoie (France); 15-22 Mar 1992
; 1992; p. 177-180; Editions Frontieres; Paris (France); Moriond particle physics meeting; 27. Rencontre de Moriond; Les Arcs, Savoie (France); 15-22 Mar 1992