在\(\sqrt{s_{NN}} = 2.4\) GeV的金离子与金离子碰撞中质子、氘核和氚核的定向、椭圆和高阶流谐波

Directed, Elliptic, and Higher Order Flow Harmonics of Protons, Deuterons, and Tritons in Au+Au Collisions at sqrt[s_{NN}]=2.4 GeV.

作者信息

Adamczewski-Musch J, Arnold O, Behnke C, Belounnas A, Belyaev A, Berger-Chen J C, Blanco A, Blume C, Böhmer M, Bordalo P, Chernenko S, Chlad L, Ciepal I, Deveaux C, Dreyer J, Epple E, Fabbietti L, Fateev O, Filip P, Fonte P, Franco C, Friese J, Fröhlich I, Galatyuk T, Garzón J A, Gernhäuser R, Golosov O, Golubeva M, Greifenhagen R, Guber F, Gumberidze M, Harabasz S, Heinz T, Hennino T, Hlavac S, Höhne C, Holzmann R, Ierusalimov A, Ivashkin A, Kämpfer B, Karavicheva T, Kardan B, Koenig I, Koenig W, Kohls M, Kolb B W, Korcyl G, Kornakov G, Kornas F, Kotte R, Kugler A, Kunz T, Kurepin A, Kurilkin A, Kurilkin P, Ladygin V, Lalik R, Lapidus K, Lebedev A, Lopes L, Lorenz M, Mahmoud T, Maier L, Malige A, Mamaev M, Mangiarotti A, Markert J, Matulewicz T, Maurus S, Metag V, Michel J, Mihaylov D M, Morozov S, Müntz C, Münzer R, Naumann L, Nowakowski K, Parpottas Y, Pechenov V, Pechenova O, Petukhov O, Piasecki K, Pietraszko J, Przygoda W, Pysz K, Ramos S, Ramstein B, Rathod N, Reshetin A, Rodriguez-Ramos P, Rosier P, Rost A, Rustamov A, Sadovsky A, Salabura P, Scheib T, Schuldes H, Schwab E, Scozzi F, Seck F, Sellheim P, Selyuzhenkov I, Siebenson J, Silva L, Singh U, Smyrski J, Sobolev Yu G, Spataro S, Spies S, Ströbele H, Stroth J, Sturm C, Svoboda O, Szala M, Tlusty P, Traxler M, Tsertos H, Usenko E, Wagner V, Wendisch C, Wiebusch M G, Wirth J, Wójcik D, Zanevsky Y, Zumbruch P

机构信息

GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany.

Excellence Cluster "Origin and Structure of the Universe," 85748 Garching, Germany.

出版信息

Phys Rev Lett. 2020 Dec 31;125(26):262301. doi: 10.1103/PhysRevLett.125.262301.

DOI:10.1103/PhysRevLett.125.262301

PMID:33449792

Abstract

Flow coefficients v_{n} of the orders n=1-6 are measured with the High-Acceptance DiElectron Spectrometer (HADES) at GSI for protons, deuterons, and tritons as a function of centrality, transverse momentum, and rapidity in Au+Au collisions at sqrt[s_{NN}]=2.4 GeV. Combining the information from the flow coefficients of all orders allows us to construct for the first time, at collision energies of a few GeV, a multidifferential picture of the angular emission pattern of these particles. It reflects the complicated interplay between the effect of the central fireball pressure on the emission of particles and their subsequent interaction with spectator matter. The high precision information on higher order flow coefficients is a major step forward in constraining the equation of state of dense baryonic matter.

摘要

利用德国重离子研究中心（GSI）的高接受度双电子谱仪（HADES），测量了金金碰撞（质心能量(\sqrt{s_{NN}})=2.4 GeV）中质子、氘核和氚核的(n) = 1 - 6阶流系数(v_{n})，作为中心度、横向动量和快度的函数。综合所有阶流系数的信息，使我们首次能够在几GeV的碰撞能量下，构建这些粒子角发射模式的多微分图像。它反映了中心火球压力对粒子发射的影响及其随后与旁观物质相互作用之间的复杂相互作用。关于高阶流系数的高精度信息是在约束致密重子物质状态方程方面向前迈出的重要一步。