Chirality distinguishes the two irreducible Weyl representations of the proper Lorentz group. For a massless particle it agrees with helicity up to the particle-antiparticle convention, while a mass term couples opposite chiralities.
The chiral projectors separate the components of a Dirac spinor. The weak charged current selects one chirality. A massive fixed-helicity state generally contains both chiral components; the simple helicity-chirality identification requires the massless limit and a specified particle-antiparticle convention.
Chirality in physics refers to the property of an object or system that cannot be superimposed on its mirror image. It is a concept that has important implications in various fields, including physics, chemistry, and biology. In physics and materials science, chirality often relates to the spatial arrangement of particles and their interactions.
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