Probing dense baryon-rich matter with virtual photons

Adamczewski-Musch, J.; Arnold, O.; Behnke, C.; Belounnas, A.; Belyaev, A.; Berger-Chen, J. C.; Biernat, J.; Blanco, A.; Blume, C.; Böhmer, M.; Bordalo, P.; Chernenko, S.; Chlad, L.; Deveaux, C.; Dittert, D.; Dreyer, J.; Dybczak, A.; Epple, E.; Fabbietti, L.; Fateev, O.; Filip, P.; Fonte, P.; Franco, C.; Friese, J.; Fröhlich, I.; Galatyuk, T.; Garzón, J. A.; Gernhäuser, R.; Golubeva, M.; Greifenhagen, R.; Guber, F.; Gumberidze, M.; Harabasz, S.; Heinz, T.; Hennino, T.; Hlaváč, S.; Höhne, C.; Holzmann, R.; Ierusalimov, A.; Ivashkin, A.; Kämpfer, B.; Karavicheva, T.; Kardan, B.; Köenig, I.; Koenig, W.; Kolb, B. W.; Korcyl, G.; Kornakov, G.; Kötte, R.; Куглер, А.; Kunz, T.; Kurepin, A.; Kurilkin, A.; Kurilkin, P. K.; Ladygin, V. P.; Lalik, R.; Lapidus, K.; Lebedev, A.; Lopes, L.; Lorenz, M.; Mahmoud, T.; Maier, L.; Mangiarotti, A.; Markert, J.; Maurus, S.; Metag, V.; Michel, J.; Mihaylov, D. M.; Morozov, S. V.; Müntz, C.; Münzer, Robert Helmut; Naumann, L.; Nowakowski, K.; Pałka, M.; Parpottas, Y.; Pechenov, V.; Pechenova, O.; Petukhov, O.; Pietraszko, J.; Przygoda, W.; Ramos, S.; Ramstein, B.; Reshetin, A.; Rodríguez-Ramos, P.; Rosier, P.; Rost, A.; Sadovsky, A.; Salabura, P.; Scheib, T.; Schuldes, H.; Schwab, E.; Scozzi, F.; Seck, F.; Sellheim, P.; Selyuzhenkov, I.; Siebenson, J.; Silva, L.; Sobolev, Yu. G.; Spataro, S.; Spies, S.; Ströbele, H.; Stroth, J.; Strzempek, P.; Sturm, C.; Svoboda, O.; Szala, M.; Tlustý, P.; Traxler, M.; Tsertos, H.; Usenko, E.; Wagner, V.; Wendisch, C.; Wiebusch, M. G.; Wirth, J.; Zanevsky, Y.; Zumbruch, P.

doi:10.1038/s41567-019-0583-8

Cited by 114 publications

(77 citation statements)

References 71 publications

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“…Fig.7: Temperature of the emitting source versus collision energy. The black symbols represent the temperature measurements of HADES [33] and NA60 [35]. The red dashed line depicts the temperature derived from the intermediate dilepton invariant mass range (1-2 GeV/c 2 ), calculated with a fireball model and a coarse-graining approach [36].…”

Section: Combining Observables Towards a Consistent Picturementioning

confidence: 99%

Probing dense QCD matter in the laboratory—The CBM experiment at FAIR

Senger¹

2020

Phys. Scr.

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The "Facility for Antiproton and Ion Research" (FAIR) in Darmstadt will provide unique research opportunities for the investigation of fundamental open questions related to nuclear physics and astrophysics, including the exploration of QCD matter under extreme conditions, which governs the structure and dynamics of cosmic objects and phenomena like neutron stars, supernova explosions, and neutron star mergers. The physics program of the Compressed Baryonic Matter (CBM) experiment is devoted to the production and investigation of dense nuclear matter, with a focus on the high-density equation-of-state (EOS), and signatures for new phases of dense QCD matter. According to the present schedule, the CBM experiment will receive the first beams from the FAIR accelerators in 2025. This article reviews promising observables, outlines the CBM detector system, and presents results of physics performance studies.

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Section: Combining Observables Towards a Consistent Picturementioning

confidence: 99%

Probing dense QCD matter in the laboratory—The CBM experiment at FAIR

Senger¹

2020

Phys. Scr.

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“…The di-electron invariant mass spectrum has been corrected for the combinatorial background and for the contributions from known vector meson decays. The result of the subtraction procedures is the so called access yield, which can be described by a thermal distribution with a temperature of about 72 MeV, and, hence, provides the possibility to directly determine the temperature of the fireball [37]. Therefore, the precise measurement of the dilepton access yield, as demonstrated by the HADES collaboration, opens the unique possibility to determine the caloric curve, when measuring the excitation function of the fireball temperature.…”

Section: Probing the Fireball Temperature With Di-leptonsmentioning

confidence: 99%

“…The purple line illustrates a hypothetic caloric curve reflecting a first order phase transition. In addition, results from the HADES [37] and NA60 [40] experiments are shown. The NA60 data point is also extracted from the spectral slope above an invariant mass of 1 GeV/c 2 .…”

Section: Probing the Fireball Temperature With Di-leptonsmentioning

confidence: 99%

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Astrophysics in the Laboratory—The CBM Experiment at FAIR

Senger

2020

Particles

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The future “Facility for Antiproton and Ion Research” (FAIR) is an accelerator-based international center for fundamental and applied research, which presently is under construction in Darmstadt, Germany. An important part of the program is devoted to questions related to astrophysics, including the origin of elements in the universe and the properties of strongly interacting matter under extreme conditions, which are relevant for our understanding of the structure of neutron stars and the dynamics of supernova explosions and neutron star mergers. The Compressed Baryonic Matter (CBM) experiment at FAIR is designed to measure promising observables in high-energy heavy-ion collisions, which are expected to be sensitive to the high-density equation-of-state (EOS) of nuclear matter and to new phases of Quantum Chromo Dynamics (QCD) matter at high densities. The CBM physics program, the relevant observables and the experimental setup will be discussed.

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“…The HADES (High-Acceptance Di-Electron Spectrometer) collaboration has performed di-electron measurements in Au + Au collisions at GSI-SIS18 with a beam kinetic energy of 1.25 A GeV, where densities of up to about 2.5 ρ 0 can be reached. After subtraction of the known contributions from vector meson decays from the di-electron invariant mass spectrum, it was found that this so-called excess spectrum exhibits an exponential shape corresponding to thermal distribution with a temperature of about 72 MeV [27]. This spectrum can be regarded as an experimental measure of the temperature of the fireball produced in the collision of the two nuclei.…”

Section: Probing the Fireball Temperature With Di-leptonsmentioning

confidence: 99%

Exploring Cosmic Matter in the Laboratory—The Compressed Baryonic Matter Experiment at FAIR

Senger

2019

Particles

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The Compressed Baryonic Matter (CBM) experiment is one of four scientific pillars of the future Facility for Antiproton and Ion Research (FAIR) in Darmstadt. In collisions between heavy nuclei at FAIR energies, it is expected that the matter in the reaction zone is compressed to more than five times saturation density, corresponding to the density in the core of a massive neutron star. This offers the unique opportunity to study in the laboratory the high-density equation-of-state (EOS) of nuclear matter, and to search for new phases of Quantum Chromo Dynamics (QCD) matter at large baryon-chemical potentials. Promising experimental observables sensitive to the EOS and to possible phase transitions will be discussed, together with a brief description of the CBM experiment.

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Probing dense baryon-rich matter with virtual photons

Cited by 114 publications

References 71 publications

Probing dense QCD matter in the laboratory—The CBM experiment at FAIR

Probing dense QCD matter in the laboratory—The CBM experiment at FAIR

Astrophysics in the Laboratory—The CBM Experiment at FAIR

Exploring Cosmic Matter in the Laboratory—The Compressed Baryonic Matter Experiment at FAIR

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