R-charge ($R$)

R-charge is the charge under a continuous R-symmetry. In four-dimensional N=1 supersymmetry, the fermion in a chiral multiplet has R-charge one less than its scalar, and every superpotential term has R-charge two.

A scalar chiral primary operator at a four-dimensional N=1 superconformal fixed point saturates a shortening bound and obeys $\Delta =3R/2$.