The Weyl equation and chiral Fermions: Relativistic Quantum Mechanics #4.2 | ZC OCW

The massless limit of the Dirac equation will be considered. The Weyl equation for 2 component spinors will be derived.

Timeline:
00:00 Introduction & Course Details
00:13 Detailed discussion on massless Dirac particles
7:40 Taking the massless limit of the Dirac equation
15:00 Comment on the parity inversion for massless Dirac particles
17:20 Comment on reducible and irreducible representations
20:00 Time-independent Wyle equation of a free particle and its solutions
26:00 Comment on the spin-projection along the direction of motion
30:00 Interesting discussion on the helicity operator
34:00 The helicity of massive particles vs. The helicity of massless particles
42:00 Comment on CP violation & the CPT symmetry

About this course (Relativistic Quantum Mechanics):
Instructor: Dr. Ali Nassar, assistant professor of Physics of Earth and Universe (PEU) program at the University of Science and Technology in Zewail City, Egypt.

About ZC OCW:
Zewail City OpenCourseWare (ZC OCW) is a project that aims to enable public access to university-level courses delivered at the University of Science and Technology in Zewail City, Egypt.