A tricky method for indirect measurement of electron Antineutrino mass

During beta decay of rest neutron, an electron anti neutrino is also emitted. $n_o\to p^++e^-+ \overline\nu_e$ by detecting momentum of proton and electron after decay and by using conservation laws of einstein's theory of relativity, i realized (indirectly) that electron anti neutrino is photon-like particle $E=\vec {P}c=\vec {P_e}c=\vec {P_p}c$ and its mass is $\overline\nu_e=\frac {E}{c^2} =0.545626\frac {Mev}{c^2}$ Essential Results: $n_o=E_p+E_e+(E=\vec{P}c)=\sqrt{\vec{P_p}^2c^2+p_o^2}+\sqrt{\vec{P_e}^2c^2+e_o^2}+ E_{\overline\nu_e}$ where the $p_o$ denotes Energy of rest proton and $e_o$ denotes Energy of rest electron. $(E=\vec{P}c)$ denotes photon-like anti-neutrino. $\alpha_w=\frac{\vec{P_e}c}{E_e}=\frac{1}{1.370073665}$ This is electron weak-structure constant (it is almost $100.0$ times stronger than fine-structure constant)