DiracSigma

Description

DiracSigma[a, b] stands for i/2*(a . b - b . a) in 4 dimensions. a and b must have Head DiracGamma, DiracMatrix or DiracSlash. Only antisymmetry is implemented.

See also:  DiracSigmaExplicit.

Examples

t1 = DiracSigma[GA[α], GA[β]]

DiracSigmaExplicit[t1]

t2 = DiracSigma[GA[β], GA[α]]

t3 = DiracSigma[GS[p], GS[q]]

DiracSigmaExplicit[t3]

Clear[t1, t2, t3]