What is the name of the basis that uses objects of definite parity?
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Currents to which gauge fields couple in four dimensions can be described as follows:
L=−gAμJμ.L=−gAμJμ.
Sometimes it useful to discuss these couplings in the chiral basis, JμLJLμ and JμRJRμ (i.e. left and right chiral currents), where under spacetime parity, the two currents transform into each other.
Other times, it is useful to describe them using objects of definite parity, JμVJVμ and JμAJAμ (i.e. vector and axial-vector currents).
L=−gAμJμ.L=−gAμJμ.
Sometimes it useful to discuss these couplings in the chiral basis, JμLJLμ and JμRJRμ (i.e. left and right chiral currents), where under spacetime parity, the two currents transform into each other.
Other times, it is useful to describe them using objects of definite parity, JμVJVμ and JμAJAμ (i.e. vector and axial-vector currents).
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