K+-(mu3) Form Factors Measurement at NA48/2
  We report here a measurement of form factors of $K^{\pm}_{\mu 3}$ decay by the NA48/2 experiment at CERN. Using a sample of 3.4$\times10^6$ events we provide preliminary form factor values according to various parametrizations. The slope of the scalar form factor is in agreement with other measurements and theory predictions. 
M. Veltri
hep-ex