Study of Spin–Spin Correlations between Quark and a Spin- Composite System

Table 1

The diquark masses and couplings for the scalar–isoscalar, vector–isoscalar diquark, and vector–isovector diquark.

Diquark	ud (Scalar s)	ud (Axial-vector a)	uu (Axial-vector )
in GeV	0.822 ± 0.053	1.492 ± 0.173	0.890 ± 0.008
	0.847 ± 0.111	1.061 ± 0.085	0.880 ± 0.008