Production of omega mesons in p+p, d+Au, Cu+Cu, and Au+Au collisions at sqrt(s_NN)=200 GeV

The PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) has measured omega meson production via leptonic and hadronic decay channels in p+p, d+Au, Cu+Cu, and Au+Au collisions at sqrt(s_NN) = 200 GeV. The invariant transverse momentum spectra measured in different decay modes give consist...

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Veröffentlicht in:	arXiv.org 2011-05
Hauptverfasser:	Aoki, K, Aramaki, Y, Bai, M, Barnes, P D, Bauer, F, Bhom, J H, Campbell, S, Constantin, P, Deaton, M B, Drapier, O, Durham, J M, Dzhordzhadze, V, D'Orazio, L, Engelmore, T, Eyser, K O, Finger, M, Frantz, J E, Frawley, A D, Fusayasu, T, Gadrat, S, Germain, M, Gong, H, Gosset, J, R Granier de Cassagnac, Grau, N, Gunji, T, Hachiya, T, A Hadj Henni, Haggerty, J S, Hanks, J, Hasuko, K, Hester, T, Holmes, M, Holzmann, W, Homma, K, Horaguchi, T, Hur, M G, Ichihara, T, Inoue, Y, Joo, K S, Kamihara, N, Kaneta, M, Karatsu, K, Kasai, M, Kawagishi, T, Kiss, Á, Kistenev, E, Koster, J, Kurosawa, M, Lee, D M, Leitch, M J, Lenzi, B, Liška, T, Maguire, C F, Manko, V I, Mannel, E, McCumber, M, McGaughey, P L, Mitchell, J T, Nakagawa, I, Nakamura, T, Ohnishi, H, Oka, M, Ouchida, M, Papavassiliou, V, Park, I H, Park, J, J -C Peng, Pereira, H, Petti, R, Rakotozafindrabe, A, Rembeczki, S, Romana, A, Rosati, M, Sedgwick, K, Seidl, R, Shigaki, K, Shohjoh, T, Silvermyr, D, Silvestre, C, Sim, K S, Sourikova, I V, Staley, F, Suire, C, Sukhanov, A, Tanaka, K H, Tanida, K, Tarján, P, Themann, H, Tserruya, I, Valle, H, Veicht, A, Virius, M, Vznuzdaev, E, Wang, X R, Wei, F, White, S N, Woody, C L, Wysocki, M, Zhang, C
Format:	Artikel
Sprache:	eng
Schlagworte:	Collisions Copper Decay Gold Heavy ions Nucleons Omega-mesons Particle production Physics - Nuclear Experiment Quarks Relativistic Heavy Ion Collider Transverse momentum
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Zusammenfassung:	The PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) has measured omega meson production via leptonic and hadronic decay channels in p+p, d+Au, Cu+Cu, and Au+Au collisions at sqrt(s_NN) = 200 GeV. The invariant transverse momentum spectra measured in different decay modes give consistent results. Measurements in the hadronic decay channel in Cu+Cu and Au+Au collisions show that omega production has a suppression pattern at high transverse momentum, similar to that of pi^0 and eta in central collisions, but no suppression is observed in peripheral collisions. The nuclear modification factors, R_AA, are consistent in Cu+Cu and Au+Au collisions at similar numbers of participant nucleons.
ISSN:	2331-8422
DOI:	10.48550/arxiv.1105.3467