Measurement of jet modification at RHIC

Charged hadrons (0.15 < p(perpendicular to) < 4 GeV/c) associated with a large p-L trigger particle (4 < p(perpendicular to)(trig) < 6 GeV/c) are statistically reconstructed in the large cceptance STAR TPC for p+p and Au+Au collisions at roots(NN) = 200 GeV. Preliminary results on transverse momentum distributions of these hadrons are presented, separately on the near and the away side from the trigger particle. An increase in the multiplicity and total scalar p(perpendicular to) of these hadrons from p+p to central Au+Au collisions is observed. The away-side distribution is found to be significantly softened in central Au+Au with respect to p+p collisions. The results are consistent with modification of jets in heavy-ion collisions at RHIC.