Directed, elliptic and higher order flow harmonics of protons, deuterons and tritons in Au+Au collisions at $\sqrt{s_{NN}} = 2.4$ GeV
25 May 2020 · HADES collaboration, 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. ·
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 to construct for the first time, at collision energies of a few GeV, a complete, multi-differential picture of the emission pattern of these particles. The ratio $v_{4}/v_{2}^{2}$ at mid-rapidity is found to be remarkably close to the value 0.5, as might be indicative for an ideal fluid scenario.
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