TITLE:
Neutrino Masses and See-Saw Mechanism
AUTHORS:
Ahmad Tarhini, Mohamad Mrad
KEYWORDS:
Neutrinos, Lagrangian and Dirac Equation, Majorana Spinors, Massive Neutrinos, See-Saw Mechanism
JOURNAL NAME:
Journal of High Energy Physics, Gravitation and Cosmology,
Vol.6 No.2,
April
26,
2020
ABSTRACT: A neutrino is a subatomic particle that is very similar to an electron, but has no electrical charge and a very small mass. Neutrinos are one of the most abundant particles in the universe. Because they have very little interaction with matter, however, they are incredibly difficult to detect. We present a study of the physics of neutrinos using the Dirac lagrangian. Based on Lorentz invariance we introduce the notion of Majorana spinor. Then we derive the mass terms for both Dirac and Majorana neutrinos. We further discuss the general framework of the See-Saw mechanism considering a simplification of the problem.