CPT, Majorana fermions, and particle physics beyond the Standard Model
Ken-ichi Hikasa
TL;DR
This paper reviews the concept of Majorana fermions, their theoretical foundations, and their potential roles in physics beyond the Standard Model, including neutrino masses and supersymmetry.
Contribution
It clarifies the definitions and relationships of Majorana, Weyl, and Dirac fields and discusses their appearances in various beyond-Standard-Model scenarios.
Findings
Majorana fermions are relevant in neutrino mass models
They play a role in baryon asymmetry explanations
Majorana fermions appear in grand unified theories and supersymmetry
Abstract
After reviewing charge conjugation and the CPT theorem, we define Majorana fermions and clarify the relationship of Majorana, Weyl, and Dirac fields. Appearance of Majorana fermions in various scenarios of physics beyond the Standard Model is discussed, including neutrino masses, baryon asymmetry of the universe, grand unified theories, and supersymmetry.
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Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · Crystallography and Radiation Phenomena · Twentieth Century Scientific Developments