A) With $〈 r_{p}^{2} 〉$ fixed at 0.707 fm²
Parton distribution	$β$	$〈 r_{n}^{2} 〉$ in fm²
MRS T	14.15	−0.378
CTEQ	9.13	−0.376
B) Independent $〈 r_{p}^{2} 〉$
Parton distribution	$β$	$〈 r_{n}^{2} 〉$ in fm²
MRS T	12.72	−0.120
CTEQ	7.70	−0.120