Further Study of the Decay K+ to pi+ nu nubar

Preprint

24 March 2004

preprint
Published by arXiv in arXiv

Abstract

An additional event near the upper kinematic limit for K+ to pi+ nu nubar has been observed by Experiment E949 at Brookhaven National Laboratory. Combining previously reported and new data, the branching ratio is B(K+ to pi+ nu nubar)= 1.47 (+1.30, - 0.89) x 10-10 based on three events observed in the pion momentum region 211<P<229 MeV/c. At the measured central value of the branching ratio, the additional event had a signal-to-background ratio of 0.9.

Keywords

BROOKHAVEN NATIONAL
ADDITIONAL EVENT
EXPERIMENT E949
KINEMATIC LIMIT
BRANCHING RATIO
NU NUBAR
DECAY K
NUBAR

All Related Versions

Version 1, 2004-03-23, ArXiv
Version 2, 2004-03-24, ArXiv
Version 3, 2004-07-09, ArXiv
Version 4, 2004-07-14, ArXiv
Published version: Physical Review Letters, 93 (3), 031801.

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