We start with a Left-Right Symmetric Model and we analyze the endpoint
of the beta decay of the tritium
^3H→3He+e-+νe. We applied this model to incorporate the right
currents, whereby we propose an amplitude whose leptonic part
contains the parameter λ defined as a left-right asymmetry
parameter which measures the parity violation. We realized the
numerical computation to the sensibility of the experiments Mainz
and Troitsk of mνe= 2.2 eV. We find that the spectrum of
energy of the electrons for this experiments it is not affected by
the left-right asymmetry parameter.
