engleski

Evidence from d+Au measurements for final-state suppression of high pT hadrons in Au+Au collisions at RHIC

We report measurements of single-particle inclusive spectra and two-particle azimuthal distributions of charged hadrons at high transverse momentum (high pT) in minimum bias and central d + Au collisions at sqrt(s)= 200 GeV. The inclusive yield is enhanced in d + Au collisions relative to binary-scaled p + p collisions, while the two-particle azimuthal distributions are very similar to those observed in p + p collisions. These results demonstrate that the strong suppression of the inclusive yield and back-to-back correlations at high pT previously observed in central Au + Au collisions are due to final-state interactions with the dense medium generated in such collisions.

nuclei with mass number 190 to 219; parton model; nuclear matter; deuteron-nucleus reactions; heavy ion-nucleus reactions; nuclear reaction theory

nije evidentirano