A Measurement of the branching ratio and form-factor of K(L) ---> mu+ mu- gamma
Journal
Physical Review Letters
Journal Volume
74
Pages
3323-3326
Date Issued
1995-04
Author(s)
Spencer, M. B.
Abstract
We report on a measurement of the decay KL→μ+μ-γ from Fermilab experiment E799. We observe 207 candidate signal events with an estimated background of 10.5±4.0 events and establish B(KL→μ+μ-γ)=[3.23±0.23(stat)±0.19(syst)] ×10-7. This provides the first measurement of the Kγγ* form factor in the muonic Dalitz decay mode of the KL. © 1995 The American Physical Society.
Type
journal article