학술논문
Light nuclei collectivity from s NN = 3 GeV Au+Au collisions at RHIC
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article
Author
Collaboration, STAR; Abdallah, MS; Aboona, BE; Adam, J; Adamczyk, L; Adams, JR; Adkins, JK; Agakishiev, G; Aggarwal, I; Aggarwal, MM; Ahammed, Z; Aitbaev, A; Alekseev, I; Anderson, DM; Aparin, A; Aschenauer, EC; Ashraf, MU; Atetalla, FG; Averichev, GS; Bairathi, V; Baker, W; Ball, JG; Barish, K; Behera, A; Bellwied, R; Bhagat, P; Bhasin, A; Bielcik, J; Bielcikova, J; Bordyuzhin, IG; Brandenburg, JD; Brandin, AV; Cai, XZ; Caines, H; de la Barca Sánchez, M Calderón; Cebra, D; Chakaberia, I; Chaloupka, P; Chan, BK; Chang, F-H; Chang, Z; Chatterjee, A; Chattopadhyay, S; Chen, D; Chen, J; Chen, JH; Chen, X; Chen, Z; Cheng, J; Choudhury, S; Christie, W; Chu, X; Crawford, HJ; Csanád, M; Daugherity, M; Dedovich, TG; Deppner, IM; Derevschikov, AA; Dhamija, A; Di Carlo, L; Didenko, L; Dixit, P; Dong, X; Drachenberg, JL; Duckworth, E; Dunlop, JC; Engelage, J; Eppley, G; Esumi, S; Evdokimov, O; Ewigleben, A; Eyser, O; Fatemi, R; Fawzi, FM; Fazio, S; Feng, CJ; Feng, Y; Finch, E; Fisyak, Y; Francisco, A; Fu, C; Gagliardi, CA; Galatyuk, T; Geurts, F; Ghimire, N; Gibson, A; Gopal, K; Gou, X; Grosnick, D; Gupta, A; Guryn, W; Hamed, A; Han, Y; Harabasz, S; Harasty, MD; Harris, JW; Harrison, H; He, S; He, W; He, XH
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Abstract
In high-energy heavy-ion collisions, partonic collectivity is evidenced by the constituent quark number scaling of elliptic flow anisotropy for identified hadrons. A breaking of this scaling and dominance of baryonic interactions is found for identified hadron collective flow measurements in sNN = 3 GeV Au+Au collisions. In this paper, we report measurements of the first- and second-order azimuthal anisotropic parameters, v1 and v2, of light nuclei (d, t, 3He, 4He) produced in sNN = 3 GeV Au+Au collisions at the STAR experiment. An atomic mass number scaling is found in the measured v1 slopes of light nuclei at mid-rapidity. For the measured v2 magnitude, a strong rapidity dependence is observed. Unlike v2 at higher collision energies, the v2 values at mid-rapidity for all light nuclei are negative and no scaling is observed with the atomic mass number. Calculations by the Jet AA Microscopic Transport Model (JAM), with baryonic mean-field plus nucleon coalescence, are in good agreement with our observations, implying baryonic interactions dominate the collective dynamics in 3 GeV Au+Au collisions at RHIC.