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Rho0 production and possible modification in Au+Au and p+p collisions at square root [sNN] = 200 GeVAdams, J; Anderson, B D; Averichev, G S; Barannikova, O; Bekele, S; Bezverkhny, B I; Bhardwaj, S; Bland, L C; Blyth, C O; Cai, X Z; Carroll, J; Castillo, J; Cebra, D; Chattopadhyay, S; Chen, H F; Dunlop, J C; Emelianov, V; Finch, E; Fu, J; Gaudichet, L; Gonzalez, J E; Gutierrez, T D; Heinz, M; Horsley, M; Huang, H Z; Humanic, T J; Jacobs, W W; Janik, M; Jones, P G; Judd, E G; Khodyrev, V Yu; Kiryluk, J; Koetke, D D; Kopytine, M; Krueger, K; Kulikov, A I; Kunde, G J; Kunz, C L; Kuznetsov, A A; Lindenbaum, S J; Lisa, M A; Liu, F; Liu, L; Liu, Q J; Ljubicic, T; Manweiler, R; Matulenko, Yu A; McShane, T S; Melnick, Yu; Moore, C F; Mora-Corral, M J; Morozov, V; Munhoz, M G; Netrakanti, P K; Pavlinov, A I; Pawlak, T; Perkins, C; Petrov, V A; Porile, N; Poskanzer, A M; Potukuchi, B V K S; Rai, G; Ray, R L; Romero, J L; Rose, A; Salur, S; Sandweiss, J; Savin, I; Schambach, J; Shestermanov, K E; Sowinski, J; Speltz, J; Spinka, H M; Stolpovsky, A; Suaide, A A P; Sugarbaker, E; Suire, C; Thein, D; Thomas, J H; Trainor, T A; Trentalange, S; Tsai, O; Ullrich, T; VanderMolen, A M; Vasiliev, A N; Voloshin, S A; Vznuzdaev, M; Wang, Z M; Webb, J C; Westfall, G D; Wieman, H; Witt, R; Wood, J; Wu, J; Xu, N; Yuting, B; Zhang, W M; Zhang, Z P; Zołnierczuk, P A; Zoulkarneev, R
Physical review letters, 2004-Mar-05, 20040305, Letnik: 92, Številka: 9Journal Article
We report results on rho(770)(0)-->pi(+)pi(-) production at midrapidity in p+p and peripheral Au+Au collisions at sqrts(NN)=200 GeV. This is the first direct measurement of rho(770)(0)-->pi(+)pi(-) in heavy-ion collisions. The measured rho(0) peak in the invariant mass distribution is shifted by approximately 40 MeV/c(2) in minimum bias p+p interactions and approximately 70 MeV/c(2) in peripheral Au+Au collisions. The rho(0) mass shift is dependent on transverse momentum and multiplicity. The modification of the rho(0) meson mass, width, and shape due to phase space and dynamical effects are discussed.
