Introduction to Chiral Symmetry
In quantum field theory, chiral symmetry is a symmetry that a Lagrangian of a physical system may have. For a physical system with chiral symmetry, the left-hand and right-hand parts of its Dirac field can be transformed independently. In this way, each item of the Lager daily volume can be divided into a vector part and an axis vector part. The vector part is treated equally for the left-hand part and the right-hand part; the axis vector part is treated differently for the left-hand part and the right-hand part.