Evidence from d+Au measurements for final-state suppression of high-p(T) hadrons in Au+Au collisions at RHIC

• Published in: Physical review letters 2003-08, Vol.91 (7), p.072304-072304
• Main Authors: Adams, J, Adler, C, Aggarwal, M M, Ahammed, Z, Amonett, J, Anderson, B D, Anderson, M, Arkhipkin, D, Averichev, G S, Badyal, S K, Balewski, J, Barannikova, O, Barnby, L S, Baudot, J, Bekele, S, Belaga, V V, Bellwied, R, Berger, J, Bezverkhny, B I, Bhardwaj, S, Bhaskar, P, Bhati, A K, Bichsel, H, Billmeier, A, Bland, L C, Blyth, C O, Bonner, B E, Botje, M, Boucham, A, Brandin, A, Bravar, A, Cadman, R V, Cai, X Z, Caines, H, Calderón de la Barca Sánchez, M, Carroll, J, Castillo, J, Castro, M, Cebra, D, Chaloupka, P, Chattopadhyay, S, Chen, H F, Chen, Y, Chernenko, S P, Cherney, M, Chikanian, A, Choi, B, Christie, W, Coffin, J P, Cormier, T M, Cramer, J G, Crawford, H J, Das, D, Das, S, Derevschikov, A A, Didenko, L, Dietel, T, Dong, X, Draper, J E, Du, F, Dubey, A K, Dunin, V B, Dunlop, J C, Dutta Majumdar, M R, Eckardt, V, Efimov, L G, Emelianov, V, Engelage, J, Eppley, G, Erazmus, B, Fachini, P, Faine, V, Faivre, J, Fatemi, R, Filimonov, K, Filip, P, Finch, E, Fisyak, Y, Flierl, D, Foley, K J, Fu, J, Gagliardi, C A, Ganti, M S, Gagunashvili, N, Gans, J, Gaudichet, L, Germain, M, Geurts, F, Ghazikhanian, V, Ghosh, P, Gonzalez, J E, Grachov, O, Grigoriev, V, Gronstal, S, Grosnick, D, Guedon, M, Guertin, S M, Gupta, A, Gushin, E, Gutierrez, T D
• Format: Article
• Language: English
• Subjects: BROOKHAVEN RHIC; GOLD IONS; HADRONS; ION-ION COLLISIONS; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.91.072304

We report measurements of single-particle inclusive spectra and two-particle azimuthal distributions of charged hadrons at high transverse momentum (high p(T)) in minimum bias and central d+Au collisions at sqrt[s(NN)]=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 p(T) previously observed in central Au+Au collisions are due to final-state interactions with the dense medium generated in such collisions.