Observation of the decay mode KL → π+π-e+e-

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

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


We report on results of an experimental search for the KL → π+π-e+e- decay mode. We found 13.5 ± 4.0 events and determined its branching ratio to be (4.4 ± 1.3(stat.) ± 0.5(syst.)) × 10-7. The result agrees well with the theoretical prediction.

Original languageEnglish
Pages (from-to)409-414
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-4
Publication statusPublished - Dec 10 1998
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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