Electromagnetic Radiation from Au + Au Collisions at √SNN = 2.4 GeV Measured with HADES
DOI:
https://doi.org/10.15407/ujpe64.7.560Keywords:
HADES, dielectrons, effective temperature, azimuthal anisotropyAbstract
We present results of low-mass dielectron measurements from Au+Au collisions at √SNN = 2.4 GeV with HADES. The focus lies on the extraction of the effective temperature from the differential dilepton spectra and the analysis of the azimuthal anisotropy of virtual photons.
References
J. Adamczewski-Musch et al. for the HADES Collaboration. Probing dense baryon-rich matter with virtual photons. Nature Physics (2019) [DOI: https://doi.org/10.1038/s41567-019-0583-8]. https://doi.org/10.1038/s41567-019-0583-8
T. Galatyuk, P. Hohler, R. Rapp, F. Seck, J. Stroth. Thermal dileptons from coarse-grained transport as fireball probes at SIS energies. Eur. Phys. J. A 52, 131 (2016). https://doi.org/10.1140/epja/i2016-16131-1
H. Specht. Thermal dileptons from hot and dense strongly interacting matter. AIP Conf. Proceed. 1322, 1 (2010). https://doi.org/10.1063/1.3541982
R. Rapp, H. van Hees. Thermal dileptons as fireball thermometer and chronometer. Phys. Lett. B 753, 586 (2016). https://doi.org/10.1016/j.physletb.2015.12.065
R. Rapp, J. Wambach, H. van Hees. The chiral restoration transition of QCD and low mass dileptons. Landolt-Bornstein 23, 134 (2010). https://doi.org/10.1007/978-3-642-01539-7_6
S. Endres, H. van Hees, J. Weil, M. Bleicher. Dilepton production and reaction dynamics in heavy-ion collisions at SIS energies from coarse-grained transport simulations. Phys. Rev. C 92, 014911 (2015). https://doi.org/10.1103/PhysRevC.92.014911
S. Endres, H. van Hees, J. Weil, M. Bleicher. Coarse-graining approach for dilepton production at energies available at the CERN Super Proton Synchrotron. Phys. Rev. C 91, 054911 (2015). https://doi.org/10.1103/PhysRevC.91.054911
J. Staudenmaier, J. Weil, V. Steinberg, S. Endres, H. Petersen. Dilepton production and resonance properties within a new hadronic transport approach in the context of the GSI-HADES experimental data. Phys. Rev. C 98 (5), 054908 (2018). https://doi.org/10.1103/PhysRevC.98.054908
S. Harabasz, (HADES Collaboration). Exploring barion rich matter with heavy-ion collisions. Ukr. Phys. J. 64, 563 (2019). https://doi.org/10.15407/ujpe64.7.583
F. Seck, T. Galatyuk, R. Rapp, J. Stroth. Probing the fireball at SIS-18 energies with thermal dilepton radiadtion. Acta Phys. Polon. Supp. 10, 717 (2017). https://doi.org/10.5506/APhysPolBSupp.10.717
R. Rapp. Dilepton spectroscopy of QCD matter at collider energies. Adv. High Energy Phys. 2013, Article ID 148253 (2013). https://doi.org/10.1155/2013/148253
C. M?untz et al. for the HADES-MDC Collaboration. The HADES tracking system. Nucl. Instrum. Meth. A 535, 242 (2004).
T. Galatyuk. HADES overview. Nucl. Phys. A, 931, 41 (2014). https://doi.org/10.1016/j.nuclphysa.2014.10.044
List of all HADES beamtimes [URL:https://www.hades.gsi.de/?q=node/5].
C. Patrignani et al. (Particle Data Group). Review of particle physics. Chinese Phys. C 40, 10 (2016). https://doi.org/10.1088/1674-1137/40/10/100001
G. Vujanovic, C. Young, B. Schenke, R. Rapp, S. Jeon, C. Gale. Dilepton emission in high-energy heavy-ion collisions with viscous hydrodynamics. Phys. Rev. C 89, 034904 (2014). https://doi.org/10.1103/PhysRevC.89.034904
P. Sellheim. Reconstruction of the low-mass dielectron signal in 1.23A GeV Au+Au collisions. PhD thesis (Johann Wolfgang Goethe-Universitet, 2017).
J.-Y. Ollitrault. Flow systematics from SIS to SPS energies. Nucl. Phys. A 638 (1-2), 195 (1998). https://doi.org/10.1016/S0375-9474(98)00413-8
L. Adamczyk, et al. Dielectron azimuthal anisotropy at mid-rapidity in Au+Au collisions at vSNN = 200 GeV. Phys. Rev. C 90, 064904 (2014).
E. Bratkovskaya, J. Aichelin, M. Thomere, S. Vogel, M. Bleicher. System size and energy dependence of dilepton production in heavy-ion collisions at 1-2 GeV/nucleon energies. Phys. Rev. C 87, 064907 (2013). https://doi.org/10.1103/PhysRevC.87.064907
I. Fr?ohlich, T. Galatyuk, R. Holzmann, J. Markert, B. Ramstein, P. Salabura, J. Stroth. Design of the Pluto event generator. J. Phys. Conf. Ser. 219, 032039 (2010). https://doi.org/10.1088/1742-6596/219/3/032039
J. Adamczewski-Musch et al. for the HADES Collaboration. Deep sub-threshold ? production in Au+Au collisions. Phys. Lett. B 778, 403 (2018).
J. Adamczewski-Musch et al. for the HADES Collaboration. Sub-threshold production of K0 s mesons and ? hyperons in Au+Au collisions at vSNN = 2.4 GeV. Phys. Lett. B 793, 457 (2019).
S. Harabasz. Multi-differential pattern of low-mass e+e? excess from vSNN = 2.4 GeV Au+Au collisions with HADES. Nucl. Phys. A 982, 771 (2019). https://doi.org/10.1016/j.nuclphysa.2018.09.052
A.Wagner et al. The emission pattern of high-energy pions: A new probe for the early phase of heavy ion collisions. Phys. Rev. Lett. 85 18 (2000). https://doi.org/10.1103/PhysRevLett.85.18
Downloads
Published
How to Cite
Issue
Section
License
Copyright Agreement
License to Publish the Paper
Kyiv, Ukraine
The corresponding author and the co-authors (hereon referred to as the Author(s)) of the paper being submitted to the Ukrainian Journal of Physics (hereon referred to as the Paper) from one side and the Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, represented by its Director (hereon referred to as the Publisher) from the other side have come to the following Agreement:
1. Subject of the Agreement.
The Author(s) grant(s) the Publisher the free non-exclusive right to use the Paper (of scientific, technical, or any other content) according to the terms and conditions defined by this Agreement.
2. The ways of using the Paper.
2.1. The Author(s) grant(s) the Publisher the right to use the Paper as follows.
2.1.1. To publish the Paper in the Ukrainian Journal of Physics (hereon referred to as the Journal) in original language and translated into English (the copy of the Paper approved by the Author(s) and the Publisher and accepted for publication is a constitutive part of this License Agreement).
2.1.2. To edit, adapt, and correct the Paper by approval of the Author(s).
2.1.3. To translate the Paper in the case when the Paper is written in a language different from that adopted in the Journal.
2.2. If the Author(s) has(ve) an intent to use the Paper in any other way, e.g., to publish the translated version of the Paper (except for the case defined by Section 2.1.3 of this Agreement), to post the full Paper or any its part on the web, to publish the Paper in any other editions, to include the Paper or any its part in other collections, anthologies, encyclopaedias, etc., the Author(s) should get a written permission from the Publisher.
3. License territory.
The Author(s) grant(s) the Publisher the right to use the Paper as regulated by sections 2.1.1–2.1.3 of this Agreement on the territory of Ukraine and to distribute the Paper as indispensable part of the Journal on the territory of Ukraine and other countries by means of subscription, sales, and free transfer to a third party.
4. Duration.
4.1. This Agreement is valid starting from the date of signature and acts for the entire period of the existence of the Journal.
5. Loyalty.
5.1. The Author(s) warrant(s) the Publisher that:
– he/she is the true author (co-author) of the Paper;
– copyright on the Paper was not transferred to any other party;
– the Paper has never been published before and will not be published in any other media before it is published by the Publisher (see also section 2.2);
– the Author(s) do(es) not violate any intellectual property right of other parties. If the Paper includes some materials of other parties, except for citations whose length is regulated by the scientific, informational, or critical character of the Paper, the use of such materials is in compliance with the regulations of the international law and the law of Ukraine.
6. Requisites and signatures of the Parties.
Publisher: Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine.
Address: Ukraine, Kyiv, Metrolohichna Str. 14-b.
Author: Electronic signature on behalf and with endorsement of all co-authors.