  Di-hadron correlations in proton-proton collisions at s^1/2 = 200 GeV are
interpreted in terms of a fragmentation width and a momentum imbalance. A
fragmentation width of 580 +- 50 GeV/c is obtained, and the momentum imbalance
gives an `intrinsic' transverse momentum width of partons in the proton of 2.6
+- 0.2 GeV/c.
