Twist3QuarkOperator[p] or
Twist3QuarkOperator[p,_,_] yields the 2-quark operator
(p is momentum in the direction of the fermion number
flow).
Twist3QuarkOperator[{p1,___}, {p2,___}, {p3, mu, a}] or
Twist3QuarkOperator[p1,_,_, p2,_,_, p3,mu,a] yields the
Quark-Quark-Gluon-operator, where p1 is the incoming quark,
p2 the incoming antiquark and p3 denotes the
(incoming) gluon momentum.
Twist3QuarkOperator[{p1,___}, {p2,___}, {p3, mu, a}, {p4, nu, b}]
or
Twist3QuarkOperator[p1,_,_, p2,_,_, p3,mu,a, p4, nu, b]
gives the Quark-Quark-Gluon-Gluon-operator. The setting of the option
Polarization (unpolarized: 0; polarized:
1) determines whether the unpolarized or polarized operator
is returned.
Overview, Twist2QuarkOperator, Twist2GluonOperator.
Twist3QuarkOperator[p](-1)^m (\gamma \cdot \Delta ).\bar{\gamma }^5 (\Delta \cdot p)^{m-1}