Distributions of charged hadrons associated with high transverse momentum particles in pp and Au plus Au collisions at root(S)(NN)=200 GeV

TLDR: In this article, the authors reconstructed hadrons in 0.15 4 4 GeV/c collisions with pp and Au+Au at the radical (s{sub NN}) = 200 GeV and the associated multiplicity and p{sub perpendicular} magnitude sum were found to increase from pp to central Au+AU collisions.

Abstract: Charged hadrons in 0.15 4 GeV/c are reconstructed in pp and Au+Au collisions at {radical}(s{sub NN})=200 GeV. The associated multiplicity and p{sub perpendicular} magnitude sum are found to increase from pp to central Au+Au collisions. The associated p{sub perpendicular} distributions, while similar in shape on the nearside, are significantly softened on the awayside in central Au+Au relative to pp and not much harder than that of inclusive hadrons. The results, consistent with jet quenching, suggest that the awayside fragments approach equilibration with the medium traversed.