Particle-species dependent modification of jet-induced correlations in Au+Au collisions at sqrt[s_{NN}]=200 GeV

• Published in: Physical review letters 2008-08, Vol.101 (8), p.082301-082301
• Main Authors: Afanasiev, S, Aidala, C, Ajitanand, N N, Akiba, Y, Alexander, J, Al-Jamel, A, Aoki, K, Aphecetche, L, Armendariz, R, Aronson, S H, Averbeck, R, Awes, T C, Azmoun, B, Babintsev, V, Baldisseri, A, Barish, K N, Barnes, P D, Bassalleck, B, Bathe, S, Batsouli, S, Baublis, V, Bauer, F, Bazilevsky, A, Belikov, S, Bennett, R, Berdnikov, Y, Bjorndal, M T, Boissevain, J G, Borel, H, Boyle, K, Brooks, M L, Brown, D S, Bucher, D, Buesching, H, Bumazhnov, V, Bunce, G, Burward-Hoy, J M, Butsyk, S, Campbell, S, Chai, J-S, Chernichenko, S, Chiba, J, Chi, C Y, Chiu, M, Choi, I J, Chujo, T, Cianciolo, V, Cleven, C R, Cobigo, Y, Cole, B A, Comets, M P, Constantin, P, Csanád, M, Csörgo, T, Dahms, T, Das, K, David, G, Delagrange, H, Denisov, A, d'Enterria, D, Deshpande, A, Desmond, E J, Dietzsch, O, Dion, A, Drachenberg, J L, Drapier, O, Drees, A, Dubey, A K, Durum, A, Dzhordzhadze, V, Efremenko, Y V, Egdemir, J, Enokizono, A, En'yo, H, Espagnon, B, Esumi, S, Fields, D E, Fleuret, F, Fokin, S L, Forestier, B, Fraenkel, Z, Frantz, J E, Franz, A, Frawley, A D, Fukao, Y, Fung, S-Y, Gadrat, S, Gastineau, F, Germain, M, Glenn, A, Gonin, M, Gosset, J, Goto, Y, Granier de Cassagnac, R, Grau, N, Greene, S V, Grosse Perdekamp, M, Gunji, T, Gustafsson, H-A, Hachiya, T
• Format: Article
• Language: English
• Subjects: BARYONS; FRAGMENTATION; HADRONS; MESONS; MODIFICATIONS; Nuclear Experiment; Physics; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; TRANSVERSE MOMENTUM
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.101.082301

Measurements in Au+Au collisions at sqrt[s_{NN}]=200 GeV of jet correlations for a trigger hadron at intermediate transverse momentum (p_{T,trig}) with associated mesons or baryons at lower p_{T,assoc} indicate strong modification of the away-side jet. The ratio of jet-associated baryons to mesons increases with centrality and p_{T,assoc}. For the most central collisions, the ratio is similar to that for inclusive measurements. This trend is incompatible with in-vacuum fragmentation but could be due to jetlike contributions from correlated soft partons, which recombine upon hadronization.