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Study of the decay KL0e()

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

Research output: Contribution to journal › Article › peer-review

Abstract

We have observed 72915 KL0e() decays in the data set collected in the 19871988 run of Fermilab experiment E731. We found the Ke4 branching ratio to be [5.160.20(stat)0.22(sys)]×10-5. We also performed the first measurement of the form factors parametrizing the decay. Our branching ratio result agrees with a prediction using a vector-meson-exchange model. An interpretation of the data in terms of chiral perturbation theory implies a value L3=(3.40.4) ×10-3 in the O(p4) chiral Lagrangian.

Original languageEnglish (US)
Pages (from-to)1591-1594
Number of pages4
JournalPhysical review letters
Volume70
Issue number11
DOIs
StatePublished - 1993
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy

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