Upper limit for the branching ratio of Ks0→e+e− decay

A.M. Blick,V.N. Kolosov, V.M. Kutjin, V.I. Shelikhov,I.E. Chirikov-Zorin, G. Chlachidze,Yu.I. Davydov,V.B. Flyagin, Vl.V. Glagolev, A.V. Kolomyichenko, A.S. Kurilin, I.P. Liba,Yu.F. Lomakin,S. Malyukov, I.P. Minashvili, O. Pukhov, V. Romanovsky,N.A. Russakovich,N.L. Russakovich,A. Semenov, A.N. Shalyugin, A.S. Solov'yov, G.V. Velev,A.G. Volodko

Physics Letters B（1994）

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Abstract

Abstract A search for K s 0 → e + e − decay was performed by means of a 624-channel lead glass shower hodoscope and a set of proportional chambers. Neutral kaons were obtained in the quasibinary charge exchange reaction. A new upper limit of 2.8×10−6 at 90% C.L. for the branching ratio is obtained.

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Key words

decay,upper limit,ratio

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