PT Journal
AU D'Ambrosio, G
   Greynat, D
   Vulvert, G
TI Standard model and new physics contributions to K (L) and K (S) into four leptons
SO European Physical Journal C
JI Eur. Phys. J. C
PY 2013
BP 2678 - 10pp
VL 73
IS 12
DI 10.1140/epjc/s10052-013-2678-1
LA English
AB We study the K (L) and K (S) decays into four leptons (, , ) where we use a form factor motivated by vector meson dominance, and show the dependence of the branching ratios and spectra from the slopes. A precise determination of short-distance contribution to K (L) ->mu μis affected by our ignorance on the sign of the amplitude but we show a possibility to measure the sign of this amplitude by studying K (L) and K (S) decays in four leptons. We also investigate the effect of New Physics contributions for these decays.
ER