W.H. Aschbacher, J.-M. Barbaroux, J. Faupin, and J.-C. Guillot
Spectral theory for a mathematical model of the 
weak interaction: The decay of the intermediate vector bosons 
W+/-. II
(379K, pdf)

ABSTRACT.  We do the spectral analysis of the Hamiltonian for the weak 
leptonic decay of the gauge bosons W+/-. Using Mourre theory, 
it is shown that the spectrum between the unique ground state and 
the first threshold is purely absolutely continuous. Neither sharp 
neutrino high energy cutoff nor infrared regularization are 
assumed.