Neutrino Masses and See-Saw Mechanism  

作　　者：Ahmad Tarhini Mohamad Mrad 

机构地区：[1]Faculty of Sciences V, Physics Department, Lebanese University, Nabatieh, Lebanon

出　　处：《Journal of High Energy Physics, Gravitation and Cosmology》2020年第2期274-281,共8页高能物理（英文）

摘　　要：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.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.

关 键 词：NEUTRINOS LAGRANGIAN and DIRAC Equation MAJORANA SPINORS Massive NEUTRINOS See-Saw Mechanism 

分 类 号：O57[理学—粒子物理与原子核物理]