Search for the decay KL→π0νν

G. E. Graham, A. R. Barker, R. A. Briere, L. K. Gibbons, G. Makoff, V. Papadimitriou, J. R. Patterson, S. V. Somalwar, Y. W. Wah, B. Winstein, R. Winston, H. Yamamoto, E. C. Swallow, G. J. Bock, R. Coleman, J. Enagonio, Y. B. Hsiung, E. Ramberg, K. Stanfield, R. TschirhartT. Yamanaka, G. D. Gollin, M. Karlsson, P. Debu, B. Peyaud, R. Turlay, B. Vallage

Research output: Contribution to journalArticlepeer-review


Data collected in Fermilab experiment E731 was used to perform the first search for the decay KL→π0νν. This decay is dominated by short distance effects and is almost entirely direct CP violating within the standard model. Cuts were developed to reject the background processes Λ→nπ0 and KL→π+e-γν. No candidate events were seen. We find BR (KL→π0νν)<2.2 × 10-4 at the 90% confidence level.

Original languageEnglish (US)
Pages (from-to)169-173
Number of pages5
JournalPhysics Letters B
Issue number1-2
StatePublished - Nov 26 1992
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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