Anisotropic flow in Xe-Xe collisions at root s(NN)=5.44 TeV

作者：Acharya S^*; Acosta F T; Adamova D; Adolfsson J; Aggarwal M M; Rinella G Aglieri; Agnello M; Agrawal N; Ahammed Z; Ahn S U; Aiola S; Akindinov A; Al Turany M; Alam S N; Albuquerque D S D; Aleksandrov D; Alessandro B; Molina R Alfaro; Ali Y; Alici A; Alkin A; Alme J; Alt T; Altenkamper L; Altsybeev I; Anaam M N; Andrei C; Andreou D; Andrews H A; Andronic A; Angeletti M; Anguelov V; Anson C; Anticic T; Antinori F; Antonioli R; Anwar R; Apadula N; Aphecetche L; Appelshauser H; Arcelli S

来源：Physics Letters B, 2018, 784: 82-95.

DOI：10.1016/j.physletb.2018.06.059

The first measurements of anisotropic flow coefficients v(n) for mid-rapidity charged particles in Xe-Xe collisions at root s(NN)=5.44TeV are presented. Comparing these measurements to those from Pb-Pb collisions at root s(NN)=5.02 TeV, v(2) is found to be suppressed for mid-central collisions at the same centrality, and enhanced for central collisions. The values of v(3) are generally larger in Xe-Xe than in Pb-Pb at a given centrality. These observations are consistent with expectations from hydrodynamic predictions. When both v(2) and v(3) are divided by their corresponding eccentricities for a variety of initial state models, they generally scale with transverse density when comparing Xe-Xe and Pb-Pb, with some deviations observed in central Xe-Xe and Pb-Pb collisions. These results assist in placing strong constraints on both the initial state geometry and medium response for relativistic heavy-ion collisions.

• 出版日期2018-9-10
• 单位中国地震局; 中国原子能科学研究院; 中国科学院上海应用物理研究所; 华中师范大学