Intrinsic transverse momentum in di-hadron correlations

Abstract

We study di-hadron correlations in proton-proton collisions at $\sqrt{s}=200$ GeV and interpret experimental data in terms of a fragmentation width and a momentum imbalance. A fragmentation width of $580\pm 50$ GeV/c is obtained, and the measured momentum imbalance gives an `intrinsic' transverse momentum width of partons in the proton of $2.6\pm 0.2$ GeV/c. Consequences to heavy ion collisions are discussed.

6 pages, 4 figures, QM2006 proceeding