Experimental search for the decay mode K_L -> pi^0 gamma e^+ e^-

K. Murakami,Y. Hemmi,H. Kurashige,Y. Matono,T. Nomura,H. Sakamoto,N. Sasao,M. Suehiro,Y. Takeuchi,Y. Fukushima, Y. Ikegami,T. T. Nakamura,T. Taniguchi,M. Asai

PHYSICS LETTERS B（1999）

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摘要

We report on results of a search for the decay mode K-L --> pi(0)gamma e(+)e(-) conducted by the E162 experiment at KEK. We observed no events and set a 90% confidence level upper limit of Br(K-L --> pi(0)gamma e(+)e(-)) < 7.1 x 10(-7) for its branching ratio. This is the first published experimental result on this decay mode. (C) 1999 Elsevier Science B.V. All rights reserved.

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