FeynCalc manual (development version)

CSID

CSID[i] can be used as input for D-1-dimensional \sigma^i with D-1-dimensional Cartesian index i and is transformed into PauliSigma[CartesianIndex[i,D-1],D-1] by FeynCalcInternal.

See also

Overview, PauliSigma.

Examples

CSID[i]

\sigma ^i

CSID[i, j] - CSID[j, i]

\sigma ^i.\sigma ^j-\sigma ^j.\sigma ^i

StandardForm[FCI[CSID[i]]]

(*PauliSigma[CartesianIndex[i, -1 + D], -1 + D]*)

CSID[i, j, k, l]

\sigma ^i.\sigma ^j.\sigma ^k.\sigma ^l

StandardForm[CSID[i, j, k, l]]

(*CSID[i] . CSID[j] . CSID[k] . CSID[l]*)