First observation of the decay K+ -> e+ nu mu+ mu-

Details First observation of the decay K+ -> e+ nu mu+ mu- First observation of the decay K+ -> e+ nu mu+ mu-

2005-05-06

arxiv.org/abs/hep-ex/0505011v3

Phys.Rev.D73:037101,2006

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, 6 figures, Revtex4. Correction to figure and minor text changes

Scientific paper

10.1103/PhysRevD.73.037101

Experiment 865 at the Brookhaven AGS has observed the decay K^+ -> e^+ nu
mu^+ mu^-. The branching ratio extracted is (1.72 +/- 0.37(stat) +/- 0.17(syst)
+/- 0.19(model)) x 10^{-8} where the third term in the error results from the
use of a model to extrapolate into a kinematic region dominated by background.

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