Measurements of mass-dependent azimuthal anisotropy in central p + Au, d + Au, and He 3 + Au collisions at sNN =200 GeV Article

Adare, A, Aidala, C, Ajitanand, NN et al. (2018). Measurements of mass-dependent azimuthal anisotropy in central p + Au, d + Au, and He 3 + Au collisions at sNN =200 GeV . PHYSICAL REVIEW C, 97(6), 10.1103/PhysRevC.97.064904

cited authors

  • Adare, A; Aidala, C; Ajitanand, NN; Akiba, Y; Alfred, M; Andrieux, V; Apadula, N; Asano, H; Azmoun, B; Babintsev, V; Bagoly, A; Bai, M; Bandara, NS; Bannier, B; Barish, KN; Bathe, S; Bazilevsky, A; Beaumier, M; Beckman, S; Belmont, R; Berdnikov, A; Berdnikov, Y; Blau, DS; Boer, M; Bok, JS; Boyle, K; Brooks, ML; Bryslawskyj, J; Bumazhnov, V; Campbell, S; Canoa Roman, V; Cervantes, R; Chen, CH; Chi, CY; Chiu, M; Choi, IJ; Choi, JB; Chujo, T; Citron, Z; Connors, M; Cronin, N; Csanád, M; Csörgo, T; Danley, TW; Datta, A; Daugherity, MS; David, G; Deblasio, K; Dehmelt, K; Denisov, A; Deshpande, A; Desmond, EJ; Dion, A; Diss, PB; Dixit, D; Do, JH; Drees, A; Drees, KA; Durham, JM; Durum, A; Enokizono, A; En'Yo, H; Esumi, S; Fadem, B; Fan, W; Feege, N; Fields, DE; Finger, M; Fokin, SL; Frantz, JE; Franz, A; Frawley, AD; Fukuda, Y; Gal, C; Gallus, P; Garg, P; Ge, H; Giordano, F; Glenn, A; Goto, Y; Grau, N; Greene, SV; Grosse Perdekamp, M; Gunji, T; Guragain, H; Hachiya, T; Haggerty, JS; Hahn, KI; Hamagaki, H; Hamilton, HF; Han, SY; Hanks, J; Hasegawa, S; Haseler, TOS; Hashimoto, K; He, X; Hemmick, TK; Hill, JC; Hill, K

authors

abstract

  • We present measurements of the transverse-momentum dependence of elliptic flow v2 for identified pions and (anti)protons at midrapidity (|η|<0.35), in 0%-5% central p+Au and He3+Au collisions at sNN=200 GeV. When taken together with previously published measurements in d+Au collisions at sNN=200 GeV, the results cover a broad range of small-collision-system multiplicities and intrinsic initial geometries. We observe a clear mass-dependent splitting of v2(pT) in d+Au and He3+Au collisions, just as in large nucleus-nucleus (A+A) collisions, and a smaller splitting in p+Au collisions. Both hydrodynamic and transport model calculations successfully describe the data at low pT (<1.5GeV/c), but fail to describe various features at higher pT. In all systems, the v2 values follow an approximate quark-number scaling as a function of the hadron transverse kinetic energy per constituent quark (KET/nq), which was also seen previously in A+A collisions.

publication date

  • June 11, 2018

published in

Digital Object Identifier (DOI)

volume

  • 97

issue

  • 6