Measurement of the quadratic slope parameter in the KL'30 decay Dalitz plot

S. V. Somalwar, A. Barker, R. A. Briere, L. K. Gibbons, G. Makoff, V. Papadimitriou, J. R. Patterson, 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. Tschirhart, T. YamanakaG. D. Gollin, M. Karlsson, J. K. Okamitsu, P. Debu, B. Peyaud, R. Turlay, B. Vallage

Research output: Contribution to journalArticlepeer-review


We report a value of -[3.3±1.1 (stat)±0.7(sys)]×10-3 for the quadratic slope parameter h in the Dalitz plot of the KL'30 decay. This result is obtained from a sample of 5.1×106 decays. The validity of the "I=1/2 rule in the quadratic term is investigated using this result. This is the first measurement of the 30 slope parameter, and also the most sensitive measurement of any of the quadratic slope parameters for the charged or neutral kaons.

Original languageEnglish (US)
Pages (from-to)2580-2583
Number of pages4
JournalPhysical review letters
Issue number17
StatePublished - 1992
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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