Konferenzpaper
Autorenliste: Harabasz, Szymon; Adamczewski-Musch, J.; Arnold, O.; Arnoldi-Meadows, B.; Belounnas, A.; Belyaev, A.; Biernat, J.; Blanco, A.; Blume, C.; Boehmer, M.; Bordalo, P.; Chlad, L.; Chudoba, P.; Ciepal, I; Deveaux, C.; Dittert, D.; Dreyer, J.; Fabbietti, L.; Fateev, O.; Fonte, P.; Franco, C.; Friese, J.; Froehlich, I; Galatyuk, T.; Garzon, J. A.; Gernhaeuser, R.; Gillitzer, A.; Golosov, O.; Golubeva, M.; Greifenhagen, R.; Guber, F.; Gumberidze, M.; Harabasz, S.; Heinz, T.; Hennino, T.; Hoehne, C.; Holzmann, R.; Ierusalimov, A.; Ivanov, V; Ivashkin, A.; Kaempfer, B.; Kajetanowicz, M.; Kampert, K-H; Kardan, B.; Khomyakov, V; Koenig, I; Koenig, W.; Korcyl, G.; Kornakov, G.; Kornas, F.; Kotte, R.; Kozela, A.; Kubos, J.; Kugler, A.; Kunz, T.; Kurilkin, P.; Kushpil, V; Ladygin, V; Lalik, R.; Lebedev, A.; Linev, S.; Lopes, L.; Lorenz, M.; Lykasov, G.; Mahmoud, T.; Malakhov, A.; Markert, J.; Maurus, S.; Metag, V; Michel, J.; Mihaylov, D. M.; Mikhaylov, V; Morozov, S.; Muentz, C.; Naumann, L.; Nowakowski, K.; Parpottas, Y.; Patel, V; Pauly, C.; Pechenov, V; Pechenova, O.; Pereira, A.; Petousis, V; Petukhov, O.; Pfeifer, D.; Pietraszko, J.; Prozorov, A. P.; Przygoda, W.; Pysz, K.; Ramos, S.; Ramstein, B.; Reshetin, A.; Ritman, L.; Rodriguez-Ramos, P.; Rost, A.; Salabura, P.; Scheib, T.; Schuldes, H.; Schwab, E.; Scozzi, F.; Seck, F.; Sellheim, P.; Selyuzhenkov, I; Silva, L.; Smyrski, J.; Sobiella, M.; Spataro, S.; Spies, S.; Strikhanov, M.; Stroebele, H.; Stroth, J.; Strzempek, P.; Svoboda, O.; Szala, M.; Taranenko, A.; Tlusty, P.; Traxler, M.; Troyan, A.; Tsertos, H.; Wagner, V; Wendisch, C.; Wiebusch, M. G.; Wintz, P.; Wirth, J.; Wloch, B.; Zhilin, A.; Zinchenko, A.; Zumbruch, P.
Jahr der Veröffentlichung: 2019
Seiten: 771-774
Zeitschrift: Nuclear Physics A: Nuclear and Hadronic Physics
Bandnummer: 982
ISSN: 0375-9474
eISSN: 1873-1554
Open Access Status: Hybrid
DOI Link: https://doi.org/10.1016/j.nuclphysa.2018.09.052
Konferenz: 27th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter)
Verlag: Elsevier
Abstract:
The matter formed in central heavy-ion collisions at a few GeV per nucleon is commonly understood as resonance matter, a gas of nucleons and excited baryon states with a substantial contribution from mesonic, mostly pionic excitations. Yet, in the initial phase of the reaction the system is compressed to beyond nuclear ground state density and hence substantial modifications of the hadron properties are expected to occur. The spectral distribution of virtual photons measured in Au+Au collisions at 2.4 GeV center of mass energy indicates strong medium effects beyond pure superposition of individual NN collisions. We present multi-differential distributions of low-mass electron pairs. This radiation is remarkably well described assuming emission from a thermalized system. To gain deeper understanding of the microscopic origin of the radiation, we extracted the centrality dependent true (not blue-shifted) temperature, its azimuthal distribution, as well as mass-dependent effective slope parameter. Virtual photon spectra are confronted with available model calculations.
Zitierstile
Harvard-Zitierstil: Harabasz, S., Adamczewski-Musch, J., Arnold, O., Arnoldi-Meadows, B., Belounnas, A., Belyaev, A., et al. (2019) Multi-differential pattern of low-mass e+e- excess from √SNN=2.4 GeV Au+Au collisions with HADES, Nuclear Physics A: Nuclear and Hadronic Physics, 982, pp. 771-774. https://doi.org/10.1016/j.nuclphysa.2018.09.052
APA-Zitierstil: Harabasz, S., Adamczewski-Musch, J., Arnold, O., Arnoldi-Meadows, B., Belounnas, A., Belyaev, A., Biernat, J., Blanco, A., Blume, C., Boehmer, M., Bordalo, P., Chlad, L., Chudoba, P., Ciepal, I., Deveaux, C., Dittert, D., Dreyer, J., Fabbietti, L., Fateev, O., ...Zumbruch, P. (2019). Multi-differential pattern of low-mass e+e- excess from √SNN=2.4 GeV Au+Au collisions with HADES. Nuclear Physics A: Nuclear and Hadronic Physics. 982, 771-774. https://doi.org/10.1016/j.nuclphysa.2018.09.052
Schlagwörter
AZIMUTHAL ANISOTROPY; dielectrons; HADES
