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1. Measurement of global polarization of Λ hyperons in few-GeV heavy-ion collisions

Author: R. Abou Yassine, J. Adamczewski-Musch, C. Asal, M. Becker, A. Belounnas, A. Blanco, C. Blume, L. Chlad, P. Chudoba, I. Ciepał, M. Cordts, J. Dreyer, W.A. Esmail, L. Fabbietti, H. Floersheimer, P. Fonte, J. Friese, I. Fröhlich, J. Förtsch, T. Galatyuk, T. Gniazdowski, R. Greifenhagen, M. Grunwald, M. Gumberidze, S. Harabasz, T. Heinz, C. Höhne, F. Hojeij, R. Holzmann, H. Huck, M. Idzik, B. Kämpfer, K-H. Kampert, B. Kardan, V. Kedych, I. Koenig, W. Koenig, M. Kohls, J. Kolas, G. Kornakov, R. Kotte, I. Kres, W. Krueger, A. Kugler, R. Lalik, S. Lebedev, S. Linev, F. Linz, L. Lopes, M. Lorenz, A. Malige, J. Markert, T. Matulewicz, S. Maurus, V. Metag, J. Michel, A. Molenda, C. Müntz, M. Nabroth, L. Naumann, K. Nowakowski, J. Orliński, J.-H. Otto, M. Parschau, C. Pauly, V. Pechenov, O. Pechenova, D. Pfeifer, K. Piasecki, J. Pietraszko, T. Povar, A. Prozorov, W. Przygoda, K. Pysz, B. Ramstein, N. Rathod, J. Ritman, P. Rodriguez-Ramos, A. Rost, A. Rustamov, P. Salabura, J. Saraiva, N. Schild, E. Schwab, F. Scozzi, F. Seck, I. Selyuzhenkov, U. Singh, L. Skorpil, J. Smyrski, S. Spies, M.S. Stefaniak, H. Ströbele, J. Stroth, K. Sumara, O. Svoboda, M. Szala, P. Tlusty, M. Traxler, V. Wagner, M. Wasiluk, A.A. Weber, C. Wendisch, J. Wirth, H.P. Zbroszczyk, E. Zherebtsova, M. Zielinski, and P. Zumbruch
Subjects: Physics, QC1-999
Abstract: The global polarization of Λ hyperons along the total orbital angular momentum of a relativistic heavy-ion collision is presented based on the high statistics data samples collected in Au+Au collisions at sNN=2.4 GeV and Ag+Ag at 2.55 GeV with the High-Acceptance Di-Electron Spectrometer (HADES) at GSI, Darmstadt. This is the first measurement below the strangeness production threshold in nucleon-nucleon collisions. Results are reported as a function of the collision centrality as well as a function of the hyperon's transverse momentum (pT) and rapidity (yCM) for the range of centrality 0–40%. We observe a strong centrality dependence of the polarization with an increasing signal towards peripheral collisions. For mid-central (20 – 40%) collisions the polarization magnitudes are 〈PΛ〉(%)=6.8±1.3(stat.)±2.1(syst.) for Au+Au and 〈PΛ〉(%)=6.2±0.4(stat.)±0.6(syst.) for Ag+Ag, which are the largest values observed so far. This observation thus provides a continuation of the increasing trend previously observed by STAR and contrasts expectations from recent theoretical calculations predicting a maximum in the region of collision energies about 3 GeV. The observed polarization is of a similar magnitude as predicted by 3D-fluid-dynamics and the UrQMD plus thermal vorticity model and significantly above results from the AMPT model.
Published: 2022
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2. Correlated pion-proton pair emission off hot and dense QCD matter

Author: J. Adamczewski-Musch, O. Arnold, C. Behnke, A. Belounnas, A. Belyaev, J.C. Berger-Chen, A. Blanco, C. Blume, M. Böhmer, P. Bordalo, S. Chernenko, L. Chlad, I. Ciepał, C. Deveaux, J. Dreyer, E. Epple, L. Fabbietti, O. Fateev, P. Filip, P. Fonte, C. Franco, J. Friese, I. Fröhlich, T. Galatyuk, J.A. Garzón, R. Gernhäuser, M. Golubeva, R. Greifenhagen, F. Guber, M. Gumberidze, S. Harabasz, T. Heinz, T. Hennino, S. Hlavac, C. Höhne, R. Holzmann, A. Ierusalimov, A. Ivashkin, B. Kämpfer, T. Karavicheva, B. Kardan, I. Koenig, W. Koenig, M. Kohls, B.W. Kolb, G. Korcyl, G. Kornakov, F. Kornas, R. Kotte, A. Kugler, T. Kunz, A. Kurepin, A. Kurilkin, P. Kurilkin, V. Ladygin, R. Lalik, K. Lapidus, A. Lebedev, L. Lopes, M. Lorenz, T. Mahmoud, L. Maier, A. Malige, A. Mangiarotti, J. Markert, T. Matulewicz, S. Maurus, V. Metag, J. Michel, D.M. Mihaylov, S. Morozov, C. Müntz, R. Münzer, L. Naumann, K. Nowakowski, Y. Parpottas, V. Pechenov, O. Pechenova, O. Petukhov, K. Piasecki, J. Pietraszko, W. Przygoda, K. Pysz, S. Ramos, B. Ramstein, N. Rathod, A. Reshetin, P. Rodriguez-Ramos, P. Rosier, A. Rost, A. Sadovsky, P. Salabura, T. Scheib, H. Schuldes, E. Schwab, F. Scozzi, F. Seck, P. Sellheim, I. Selyuzhenkov, J. Siebenson, L. Silva, U. Singh, J. Smyrski, Yu.G. Sobolev, S. Spataro, S. Spies, H. Ströbele, J. Stroth, C. Sturm, O. Svoboda, M. Szala, P. Tlusty, M. Traxler, H. Tsertos, E. Usenko, V. Wagner, C. Wendisch, M.G. Wiebusch, J. Wirth, D. Wójcik, Y. Zanevsky, and P. Zumbruch
Subjects: Baryonic resonances, Heavy-ion reactions, Freezeout, Physics, QC1-999
Abstract: In this letter we report the first multi-differential measurement of correlated pion-proton pairs from 2 billion Au+Au collisions at sNN=2.42 GeV collected with HADES. In this energy regime the population of Δ(1232) resonances plays an important role in the way energy is distributed between intrinsic excitation energy and kinetic energy of the hadrons in the fireball. The triple differential d3N/dMπ±pdpTdy distributions of correlated π±p pairs have been determined by subtracting the πp combinatorial background using an iterative method. The invariant-mass distributions in the Δ(1232) mass region show strong deviations from a Breit-Wigner function with vacuum width and mass. The yield of correlated pion-proton pairs exhibits a complex isospin, rapidity and transverse-momentum dependence. In the invariant mass range 1.1
Published: 2021
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3. Identical pion intensity interferometry in central Au+Au collisions at 1.23A GeV

Author: J. Adamczewski-Musch, O. Arnold, C. Behnke, A. Belounnas, A. Belyaev, J.C. Berger-Chen, J. Biernat, A. Blanco, C. Blume, M. Böhmer, P. Bordalo, S. Chernenko, L. Chlad, C. Deveaux, J. Dreyer, A. Dybczak, E. Epple, L. Fabbietti, O. Fateev, P. Filip, P. Fonte, C. Franco, J. Friese, I. Fröhlich, T. Galatyuk, J.A. Garzón, R. Gernhäuser, M. Golubeva, R. Greifenhagen, F. Guber, M. Gumberidze, S. Harabasz, T. Heinz, T. Hennino, S. Hlavac, C. Höhne, R. Holzmann, A. Ierusalimov, A. Ivashkin, B. Kämpfer, T. Karavicheva, B. Kardan, I. Koenig, W. Koenig, B.W. Kolb, G. Korcyl, G. Kornakov, R. Kotte, A. Kugler, T. Kunz, A. Kurepin, A. Kurilkin, P. Kurilkin, V. Ladygin, R. Lalik, K. Lapidus, A. Lebedev, L. Lopes, M. Lorenz, T. Mahmoud, L. Maier, A. Mangiarotti, J. Markert, T. Matulewicz, S. Maurus, V. Metag, J. Michel, D.M. Mihaylov, S. Morozov, C. Müntz, R. Münzer, L. Naumann, K. Nowakowski, M. Palka, Y. Parpottas, V. Pechenov, O. Pechenova, O. Petukhov, K. Piasecki, J. Pietraszko, W. Przygoda, S. Ramos, B. Ramstein, A. Reshetin, P. Rodriguez-Ramos, P. Rosier, A. Rost, A. Sadovsky, P. Salabura, T. Scheib, H. Schuldes, E. Schwab, F. Scozzi, F. Seck, P. Sellheim, I. Selyuzhenkov, J. Siebenson, L. Silva, Yu.G. Sobolev, S. Spataro, S. Spies, H. Ströbele, J. Stroth, P. Strzempek, C. Sturm, O. Svoboda, M. Szala, P. Tlusty, M. Traxler, H. Tsertos, E. Usenko, V. Wagner, C. Wendisch, M.G. Wiebusch, J. Wirth, D. Wójcik, Y. Zanevsky, and P. Zumbruch
Subjects: Physics, QC1-999
Abstract: We investigate identical pion HBT intensity interferometry in central Au+Au collisions at 1.23A GeV. High-statistics π−π− and π+π+ data are measured with HADES at SIS18/GSI. The radius parameters, derived from the correlation function depending on relative momenta in the longitudinally comoving system and parametrized as three-dimensional Gaussian distribution, are studied as function of transverse momentum. A substantial charge-sign difference of the source radii is found, particularly pronounced at low transverse momentum. The extracted source parameters agree well with a smooth extrapolation of the center-of-mass energy dependence established at higher energies, extending the corresponding excitation functions down towards a very low energy.
Published: 2019
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4. Sub-threshold production of Ks0 mesons and Λ hyperons in Au+Au collisions at sNN=2.4 GeV

Author: J. Adamczewski-Musch, O. Arnold, C. Behnke, A. Belounnas, A. Belyaev, J.C. Berger-Chen, J. Biernat, A. Blanco, C. Blume, M. Böhmer, P. Bordalo, S. Chernenko, L. Chlad, C. Deveaux, J. Dreyer, A. Dybczak, E. Epple, L. Fabbietti, O. Fateev, P. Filip, P. Fonte, C. Franco, J. Friese, I. Fröhlich, T. Galatyuk, J.A. Garzón, R. Gernhäuser, M. Golubeva, R. Greifenhagen, F. Guber, M. Gumberidze, S. Harabasz, T. Heinz, T. Hennino, S. Hlavac, C. Höhne, R. Holzmann, A. Ierusalimov, A. Ivashkin, B. Kämpfer, T. Karavicheva, B. Kardan, I. Koenig, W. Koenig, B.W. Kolb, G. Korcyl, G. Kornakov, R. Kotte, A. Kugler, T. Kunz, A. Kurepin, A. Kurilkin, P. Kurilkin, V. Ladygin, R. Lalik, K. Lapidus, A. Lebedev, L. Lopes, M. Lorenz, T. Mahmoud, L. Maier, A. Mangiarotti, J. Markert, S. Maurus, V. Metag, J. Michel, D.M. Mihaylov, S. Morozov, C. Müntz, R. Münzer, L. Naumann, K. Nowakowski, M. Palka, Y. Parpottas, V. Pechenov, O. Pechenova, O. Petukhov, J. Pietraszko, W. Przygoda, S. Ramos, B. Ramstein, A. Reshetin, P. Rodriguez-Ramos, P. Rosier, A. Rost, A. Sadovsky, P. Salabura, T. Scheib, H. Schuldes, E. Schwab, F. Scozzi, F. Seck, P. Sellheim, I. Selyuzhenkov, J. Siebenson, L. Silva, Yu.G. Sobolev, S. Spataro, S. Spies, H. Ströbele, J. Stroth, P. Strzempek, C. Sturm, O. Svoboda, M. Szala, P. Tlusty, M. Traxler, H. Tsertos, E. Usenko, V. Wagner, C. Wendisch, M.G. Wiebusch, J. Wirth, Y. Zanevsky, P. Zumbruch, and Y. Leifels
Subjects: Physics, QC1-999
Abstract: We present first data on sub-threshold production of Ks0 mesons and Λ hyperons in Au+Au collisions at sNN=2.4 GeV. We observe an universal 〈Apart〉 scaling of hadrons containing strangeness, independent of their corresponding production thresholds. Comparing the yields, their 〈Apart〉 scaling, and the shapes of the rapidity and the pt spectra to state-of-the-art transport model (UrQMD, HSD, IQMD) predictions, we find that none of them can simultaneously describe these observables with reasonable χ2 values.
Published: 2019
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5. Σ0 production in proton nucleus collisions near threshold

Author: J. Adamczewski-Musch, G. Agakishiev, O. Arnold, E.T. Atomssa, C. Behnke, J.C. Berger-Chen, J. Biernat, A. Blanco, C. Blume, M. Böhmer, P. Bordalo, S. Chernenko, C. Deveaux, A. Dybczak, E. Epple, L. Fabbietti, O. Fateev, P. Fonte, C. Franco, J. Friese, I. Fröhlich, T. Galatyuk, J.A. Garzón, R. Gernhäuser, K. Gill, M. Golubeva, F. Guber, M. Gumberidze, S. Harabasz, T. Hennino, S. Hlavac, C. Höhne, R. Holzmann, A. Ierusalimov, A. Ivashkin, M. Jurkovic, B. Kämpfer, T. Karavicheva, B. Kardan, I. Koenig, W. Koenig, B.W. Kolb, G. Korcyl, G. Kornakov, R. Kotte, A. Krása, E. Krebs, H. Kuc, A. Kugler, T. Kunz, A. Kurepin, A. Kurilkin, P. Kurilkin, V. Ladygin, R. Lalik, K. Lapidus, A. Lebedev, L. Lopes, M. Lorenz, T. Mahmoud, L. Maier, S. Maurus, A. Mangiarotti, J. Markert, V. Metag, J. Michel, C. Müntz, R. Münzer, L. Naumann, M. Palka, Y. Parpottas, V. Pechenov, O. Pechenova, V. Petousis, J. Pietraszko, W. Przygoda, S. Ramos, B. Ramstein, L. Rehnisch, A. Reshetin, A. Rost, A. Rustamov, A. Sadovsky, P. Salabura, T. Scheib, K. Schmidt-Sommerfeld, H. Schuldes, P. Sellheim, J. Siebenson, L. Silva, Yu.G. Sobolev, S. Spataro, H. Ströbele, J. Stroth, P. Strzempek, C. Sturm, O. Svoboda, A. Tarantola, K. Teilab, P. Tlusty, M. Traxler, H. Tsertos, T. Vasiliev, V. Wagner, C. Wendisch, J. Wirth, J. Wüstenfeld, Y. Zanevsky, and P. Zumbruch
Subjects: Physics, QC1-999
Abstract: The production of Σ0 baryons in the nuclear reaction p (3.5 GeV) + Nb (corresponding to sNN=3.18 GeV) is studied with the detector set-up HADES at GSI, Darmstadt. Σ0s were identified via the decay Σ0→Λγ with subsequent decays Λ→pπ− in coincidence with a e+e− pair from either external (γ→e+e−) or internal (Dalitz decay γ⁎→e+e−) gamma conversions. The differential Σ0 cross section integrated over the detector acceptance, i.e. the rapidity interval 0.5
Published: 2018
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6. Deep sub-threshold ϕ production in Au+Au collisions

Author: J. Adamczewski-Musch, O. Arnold, C. Behnke, A. Belounnas, A. Belyaev, J.C. Berger-Chen, J. Biernat, A. Blanco, C. Blume, M. Böhmer, P. Bordalo, S. Chernenko, L. Chlad, C. Deveaux, J. Dreyer, A. Dybczak, E. Epple, L. Fabbietti, O. Fateev, P. Filip, P. Fonte, C. Franco, J. Friese, I. Fröhlich, T. Galatyuk, J.A. Garzón, R. Gernhäuser, M. Golubeva, R. Greifenhagen, F. Guber, M. Gumberidze, S. Harabasz, T. Heinz, T. Hennino, S. Hlavac, C. Höhne, R. Holzmann, A. Ierusalimov, A. Ivashkin, B. Kämpfer, T. Karavicheva, B. Kardan, I. Koenig, W. Koenig, B.W. Kolb, G. Korcyl, G. Kornakov, R. Kotte, W. Kühn, A. Kugler, T. Kunz, A. Kurepin, A. Kurilkin, P. Kurilkin, V. Ladygin, R. Lalik, K. Lapidus, A. Lebedev, L. Lopes, M. Lorenz, T. Mahmoud, L. Maier, A. Mangiarotti, J. Markert, S. Maurus, V. Metag, J. Michel, D.M. Mihaylov, S. Morozov, C. Müntz, R. Münzer, L. Naumann, K.N. Nowakowski, M. Palka, Y. Parpottas, V. Pechenov, O. Pechenova, O. Petukhov, J. Pietraszko, W. Przygoda, S. Ramos, B. Ramstein, A. Reshetin, P. Rodriguez-Ramos, P. Rosier, A. Rost, A. Sadovsky, P. Salabura, T. Scheib, H. Schuldes, E. Schwab, F. Scozzi, F. Seck, P. Sellheim, J. Siebenson, L. Silva, Yu.G. Sobolev, S. Spataro, H. Ströbele, J. Stroth, P. Strzempek, C. Sturm, O. Svoboda, M. Szala, P. Tlusty, M. Traxler, H. Tsertos, E. Usenko, V. Wagner, C. Wendisch, M.G. Wiebusch, J. Wirth, Y. Zanevsky, and P. Zumbruch
Subjects: Physics, QC1-999
Abstract: We present data on charged kaons (K±) and ϕ mesons in Au(1.23A GeV)+Au collisions. It is the first simultaneous measurement of K− and ϕ mesons in central heavy-ion collisions below a kinetic beam energy of 10A GeV. The ϕ/K− multiplicity ratio is found to be surprisingly high with a value of 0.52±0.16 and shows no dependence on the centrality of the collision. Consequently, the different slopes of the K+ and K− transverse-mass spectra can be explained solely by feed-down, which substantially softens the spectra of K− mesons. Hence, in contrast to the commonly adapted argumentation in literature, the different slopes do not necessarily imply diverging freeze-out temperatures of K+ and K− mesons caused by different couplings to baryons.
Published: 2018
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7. Mecp2 regulates tnfa during zebrafish embryonic development and acute inflammation

Author: M. van der Vaart, O. Svoboda, B. G. Weijts, R. Espín-Palazón, V. Sapp, T. Pietri, M. Bagnat, A. R. Muotri, and D. Traver
Subjects: Inflammation, mecp2, tnfa, Zebrafish, Rett syndrome, Medicine, Pathology, RB1-214
Abstract: Mutations in MECP2 cause Rett syndrome, a severe neurological disorder with autism-like features. Duplication of MECP2 also causes severe neuropathology. Both diseases display immunological abnormalities that suggest a role for MECP2 in controlling immune and inflammatory responses. Here, we used mecp2-null zebrafish to study the potential function of Mecp2 as an immunological regulator. Mecp2 deficiency resulted in an increase in neutrophil infiltration and upregulated expression of the pro- and anti-inflammatory cytokines Il1b and Il10 as a secondary response to disturbances in tissue homeostasis. By contrast, expression of the proinflammatory cytokine tumor necrosis factor alpha (Tnfa) was consistently downregulated in mecp2-null animals during development, representing the earliest developmental phenotype described for MECP2 deficiency to date. Expression of tnfa was unresponsive to inflammatory stimulation, and was partially restored by re-expression of functional mecp2. Thus, Mecp2 is required for tnfa expression during zebrafish development and inflammation. Finally, RNA sequencing of mecp2-null embryos revealed dysregulated processes predictive for Rett syndrome phenotypes.
Published: 2017
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8. Radiation hardness of Silicon Photomultipliers for CBM@FAIR, NA61@CERN and BM@N experiments

Author: P. Tlustý, O. Svoboda, V. Mikhaylov, A. Kugler, F. Guber, V. Kushpil, S. Morozov, and A. Ivashkin
Subjects: Physics, Nuclear and High Energy Physics, 010504 meteorology & atmospheric sciences, 010308 nuclear & particles physics, Cyclotron, 01 natural sciences, Calorimeter, law.invention, Nuclear physics, Silicon photomultiplier, law, Neutron flux, 0103 physical sciences, Neutron, Irradiation, Instrumentation, Radiation hardening, 0105 earth and related environmental sciences, Dark current
Abstract: Results of radiation hardness study of Silicon Photomultipliers (SiPMs) to be used at forward hadron calorimeters , including designed Projectile Spectator Detector (PSD) of CBM, PSD of NA61 beyond 2020 upgrade and Zero Degree Calorimeter (ZDC) at BM@N are presented. High intensity beams at future heavy-ion accelerator facilities up to 1 0 6 ∕ 1 0 7 interactions/second will lead to high neutron fluence around calorimeters up to 3 × 1 0 12 n e q /cm 2 accumulated during a year of the experiment operation. SiPMs produced by Ketek, Zecotek, Hamamatsu and Sensl manufacturers were irradiated at cyclotron of NPI Rez in a wide range of neutron fluences from 4 × 1 0 10 up to 6 × 1 0 12 n/cm 2 . Change of SiPM’s main parameters after irradiation including dark current, breakdown voltage, noise and signal response to LED was studied in the lab. Furthermore, several packs of irradiated SiPMs were installed at the currently operating NA61 PSD to study the cumulative radiation effect on the calorimeter performance. Beam scan with 20–80 GeV/c protons was performed to determine the dependency of detector energy resolution on beam energy before and after irradiation.
Published: 2018

9. Activation measurement of neutron production and transport in a thick lead target and a uranium blanket during 4 GeV deuteron irradiation

Author: O. Svoboda, J. Vrzalova, M. Kadykov, A. Krása, V. Wagner, A. Kugler, M. Suchopár, W.I. Furman, Lukas Zavorka, Sergey I. Tyutyunnikov, A.A. Baldin, A. A. Solnyshkin, J. Khushvaktov, P. Chudoba, P. Tichý, J. Adam, Mitja Majerle, and V. M. Tsoupko-Sitnikov
Subjects: Physics, Nuclear and High Energy Physics, Nuclotron, Nuclear transmutation, Proton, 010308 nuclear & particles physics, Nuclear Theory, chemistry.chemical_element, Natural uranium, Uranium, 010403 inorganic & nuclear chemistry, 01 natural sciences, Synchrotron, 0104 chemical sciences, law.invention, Nuclear physics, chemistry, Deuterium, law, 0103 physical sciences, Physics::Accelerator Physics, Neutron, Nuclear Experiment, Instrumentation
Abstract: Several simple accelerator-driven system (ADS) setups were irradiated by relativistic proton and deuteron beams in last years at the Nuclotron synchrotron site of the Joint Institute for Nuclear Research (JINR) in Dubna, Russia. This paper is dedicated to a 4 GeV deuteron irradiation of a setup called Energy plus Transmutation (E+T), consisting of a lead target, natural uranium blanket, and polyethylene shielding. This paper represents the finalization of data analysis and concludes systematics of the proton and deuteron experiments carried out with the E+T setup. Activation detectors served for monitoring of proton and deuteron beams and for measurements of neutron field distribution in model ADS studies. Products of reactions with thresholds up to 106 MeV as well as non-threshold reactions were observed in the samples. The yields of the produced isotopes were determined using the gamma-ray spectrometry and compared with Monte Carlo simulations performed with the MCNPX transport code.
Published: 2018

10. Directed, Elliptic, and Higher Order Flow Harmonics of Protons, Deuterons, and Tritons inAu+AuCollisions atsNN=2.4 GeV

Author: M. Lorenz, S. Spataro, A. Malige, Roman Gernhäuser, A. Kugler, J. Dreyer, I. Fröhlich, Alexander Belyaev, Tatiana Karavicheva, T. Hennino, C. Behnke, P. Tlusty, L. Chlad, C. Wendisch, T. Heinz, Kirill Lapidus, S. Spies, Yu. G. Sobolev, J. A. Garzón, C. Müntz, F. Seck, A. Blanco, P. Fonte, B. Kämpfer, I. Koenig, Laura Fabbietti, Ilya Selyuzhenkov, L. Lopes, P. Zumbruch, Eliane Epple, A. Ivashkin, R. Kotte, K. Pysz, T. Scheib, O. Pechenova, P. Bordalo, C. Deveaux, H. Ströbele, M. Gumberidze, J. Pietraszko, Fedor Guber, R. Greifenhagen, Andrey Reshetin, M. Mamaev, C. Sturm, Oliver Werner Arnold, N. Rathod, V. Wagner, R. H. Munzer, D. M. Mihaylov, P. Rosier, S. Maurus, Y. Parpottas, O. Svoboda, J. Stroth, L. Silva, J. Friese, F. Scozzi, J. Adamczewski-Musch, V. Pechenov, K. Nowakowski, Sergey V. Morozov, B. Kardan, O. Petukhov, Grzegorz Korcyl, T. Mahmoud, B. W. Kolb, R. Lalik, A. K. Kurilkin, Krzysztof Piasecki, T. Kunz, P. Sellheim, A. Rost, Udai Pratap Singh, Christoph Blume, P. Filip, Yu.V. Zanevsky, Witold Przygoda, C. Franco, M. B. Golubeva, P. Rodriguez-Ramos, W. Koenig, G. Kornakov, B. Ramstein, T. Matulewicz, D. Wójcik, S. P. Chernenko, Volker Metag, A. Sadovsky, J. Michel, A. Lebedev, J. Wirth, M. Szala, A. Belounnas, A. B. Kurepin, S. Harabasz, M. Traxler, Jerzy Smyrski, M. Böhmer, A. Mangiarotti, T. Galatyuk, Piotr Salabura, L. Naumann, L. Maier, P. K. Kurilkin, C. Höhne, M. G. Wiebusch, E. Usenko, H. Schuldes, Izabela Ciepał, J. C. Berger-Chen, R. Holzmann, J. Markert, S. Ramos, S. Hlavac, V. P. Ladygin, O. V. Fateev, O. Golosov, F. Kornas, M. Kohls, J. Siebenson, E. Schwab, A.P. Ierusalimov, A. Rustamov, and H. Tsertos
Subjects: Physics, Equation of state, Spectrometer, Nuclear Theory, Elliptic flow, General Physics and Astronomy, 01 natural sciences, 7. Clean energy, Baryon, Nuclear physics, Deuterium, Flow (mathematics), Harmonics, 0103 physical sciences, Rapidity, Nuclear Experiment, 010306 general physics
Abstract: Flow coefficients vn 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 sNN=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.
Published: 2020

11. Charged-pion production in $$\mathbf {Au+Au}$$ collisions at $$\sqrt{\mathbf {s}_{\mathbf {NN}}} = 2.4~{\mathbf {GeV}}$$

Author: L. Silva, C. Wendisch, K. Nowakowski, Tatiana Karavicheva, C. Behnke, J. A. Garzón, A. Blanco, P. Fonte, A. Ivashkin, R. Kotte, T. Galatyuk, E. Epple, S. Maurus, Piotr Salabura, L. Naumann, P. Rosier, P. Bordalo, Laura Fabbietti, C. Höhne, M. G. Wiebusch, E. Usenko, L. Maier, Christoph Blume, B. Kardan, V. Pechenov, M. Lorenz, Y. Parpottas, W. Koenig, H. Schuldes, S. Harabasz, O. Petukhov, M. Böhmer, A. Mangiarotti, A. K. Kurilkin, B. W. Kolb, E. Schwab, B. Kämpfer, A. Malige, Fedor Guber, P. Filip, A. Rost, M. Gumberidze, Yu. G. Sobolev, C. Müntz, R. Holzmann, J. Markert, S. Ramos, V. P. Ladygin, I. Koenig, Yu.V. Zanevsky, T. Heinz, P. Zumbruch, F. Scozzi, Izabela Ciepał, P. K. Kurilkin, Ilya Selyuzhenkov, T. Hennino, Oliver Werner Arnold, J. Adamczewski-Musch, M. B. Golubeva, P. Rodriguez-Ramos, A.P. Ierusalimov, F. Kornas, Grzegorz Korcyl, L. Chlad, H. Tsertos, O. Pechenova, A. Lebedev, Roman Gernhäuser, B. Ramstein, S. Hlavac, T. Matulewicz, A. Kugler, J. Pietraszko, A. Belounnas, A. B. Kurepin, M. Traxler, J. Dreyer, Alexander Belyaev, A. Sadovsky, A. Rustamov, J. C. Berger-Chen, S. Spies, C. Sturm, N. Rathod, S. Gläßel, C. Franco, Sergey V. Morozov, F. Seck, K. Pysz, T. Scheib, Witold Przygoda, M. Kohls, J. Siebenson, G. Kornakov, J. Friese, Udai Pratap Singh, C. Deveaux, R. Greifenhagen, O. Svoboda, R. Lalik, L. Lopes, Joachim Stroth, S. Spataro, I. Fröhlich, P. Tlusty, T. Mahmoud, P. Sellheim, H. Ströbele, V. Wagner, Andrey Reshetin, R. H. Munzer, D. M. Mihaylov, S. P. Chernenko, Volker Metag, J. Michel, J. Wirth, Krzysztof Piasecki, T. Kunz, M. Szala, Jerzy Smyrski, K. Lapidus, D. Wójcik, and O. V. Fateev
Subjects: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Hadron, 01 natural sciences, ddc, Nuclear physics, Pion, 0103 physical sciences, Transverse mass, Rapidity, Impact parameter, Multiplicity (chemistry), 010306 general physics, Nucleon, Centrality
Abstract: We present high-statistic data on charged-pion emission from Au + Au collisions at $$\sqrt{s_{\mathrm{NN}}} = 2.4~\hbox {GeV}$$ s NN = 2.4 GeV (corresponding to $$E_{beam} = 1.23~\hbox {A GeV}$$ E beam = 1.23 A GeV ) in four centrality classes in the range 0–40% of the most central collisions. The data are analyzed as a function of transverse momentum, transverse mass, rapidity, and polar angle. Pion multiplicity per participating nucleon decreases moderately with increasing centrality. The polar angular distributions are found to be non-isotropic even for the most central event class. Our results on pion multiplicity fit well into the general trend of the available world data, but undershoot by $$2.5~\sigma $$ 2.5 σ data from the FOPI experiment measured at slightly lower beam energy. We compare our data to state-of-the-art transport model calculations (PHSD, IQMD, PHQMD, GiBUU and SMASH) and find substantial differences between the measurement and the results of these calculations.
Published: 2020

12. Proton-number fluctuations in sNN=2.4 GeV Au + Au collisions studied with the High-Acceptance DiElectron Spectrometer (HADES)

Author: H. Tsertos, N. Rathod, E. Schwab, J. Stroth, A. Sadovsky, Roman Gernhäuser, A. Kugler, A.P. Ierusalimov, L. Silva, Laura Fabbietti, S. Spies, G. Korcyl, Oliver Werner Arnold, W. Koenig, K. Nowakowski, Yu.V. Zanevsky, F. Scozzi, T. Galatyuk, J. Adamczewski-Musch, R. Lalik, A. Rustamov, V. P. Ladygin, F. Kornas, A. Lebedev, O. V. Fateev, A. Belounnas, M. Traxler, L. Chlad, P. Rodriguez-Ramos, B. W. Kolb, C. Sturm, P. Tlusty, Kirill Lapidus, V. Pechenov, Sergey V. Morozov, L. Lopes, F.F. Guber, L. Maier, A. K. Kurilkin, M. Szala, M. Böhmer, Yiannis Parpottas, E. Usenko, I. Koenig, A. Mangiarotti, Ilya Selyuzhenkov, B. Kämpfer, P. Filip, K. Pysz, T. Scheib, Alexey Kurepin, B. Kardan, O. Petukhov, J. A. Garzón, T. Hennino, A. Blanco, P. Fonte, H. Schuldes, M. Kohls, J. Siebenson, A. Rost, A. Ivashkin, B. Ramstein, S. Harabasz, C. Wendisch, M. Gumberidze, T. Matulewicz, R. Kotte, S. Spataro, Witold Przygoda, I. Fröhlich, P. Bordalo, O. Pechenova, Krzysztof Piasecki, T. Kunz, Izabela Ciepał, Jerzy Smyrski, T. Heinz, C. Höhne, J. C. Berger-Chen, J. Pietraszko, M. G. Wiebusch, Christoph Blume, M.B. Golubeva, Andrey Reshetin, V. Metag, H. Ströbele, Yu. G. Sobolev, R. H. Munzer, D. M. Mihaylov, C. Müntz, R. Holzmann, J. Markert, M. Lorenz, V. Wagner, P. Rosier, S. Maurus, Tatiana Karavicheva, S. Ramos, C. Behnke, P. K. Kurilkin, L. Naumann, Udai Pratap Singh, S. Hlavac, T. Mahmoud, A. Malige, D. Wójcik, P. Sellheim, S. P. Chernenko, P. Zumbruch, P. Salabura, J. Dreyer, Alexander Belyaev, J. Friese, J. Michel, J. Wirth, F. Seck, Eliane Epple, G. Kornakov, C. Franco, C. Deveaux, R. Greifenhagen, and O. Svoboda
Subjects: Physics, Proton, Spectrometer, 010308 nuclear & particles physics, Position and momentum space, 01 natural sciences, 7. Clean energy, Nuclear physics, Isospin, Phase space, 0103 physical sciences, Rapidity, Atomic number, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract: We present an analysis of proton-number fluctuations in sNN=2.4 GeV Au197+Au197 collisions measured with the High-Acceptance DiElectron Spectrometer (HADES) at GSI Helmholtzzentrum fur Schwerionenforschung, Darmstadt. With the help of extensive detector simulations done with Isospin Quantum Molecular Dynamics (IQMD) transport model events including nuclear clusters, various nuisance effects influencing the observed proton cumulants have been investigated. Acceptance and efficiency corrections have been applied as a function of fine-grained rapidity and transverse momentum bins, as well as considering local track density dependencies. Next, the effects of volume changes within particular centrality selections have been considered and beyond-leading-order corrections have been applied to the data. The efficiency and volume-corrected proton number moments and cumulants Kn of orders n=1, 2, 3, and 4 have been obtained as a function of centrality and phase-space bin, as well as the corresponding correlators Cn. We find that the observed correlators show a power-law scaling with the mean number of protons, i.e., Cn∞«N»n, indicative of mostly long-range multiparticle correlations in momentum space. We also present a comparison of our results with Au + Au collision data obtained at the Relativistic Heavy Ion Collider (RHIC) at similar centralities but higher √sNN.
Published: 2020

13. Two-pion production in the second resonance region in π−p collisions with the High-Acceptance Di-Electron Spectrometer (HADES)

Author: J. Stroth, Sergey V. Morozov, F.F. Guber, E. Schwab, B. Kämpfer, A. Sadovsky, Yiannis Parpottas, G. Korcyl, R. Lalik, O. V. Fateev, M. Böhmer, Alexey Kurepin, D. Dittert, A.P. Ierusalimov, W. Koenig, M. Gumberidze, C. Franco, H. Ströbele, V. Wagner, T. Mahmoud, A. Prozorov, P. Sellheim, S. Spataro, V. P. Ladygin, L. Silva, I. Fröhlich, H. Schuldes, Roman Gernhäuser, K. Nowakowski, J. Dreyer, A. Kugler, Alexander Belyaev, C. Müntz, C. Wendisch, Oliver Werner Arnold, T. Galatyuk, Yu.V. Zanevsky, J. Kuboś, C. Höhne, L. Lopes, T. Kunz, F. Kornas, M. G. Wiebusch, Izabela Ciepał, Piotr Salabura, C. Sturm, S. Spies, F. Scozzi, J. A. Garzón, E. T. Atomssa, L. Chlad, G. Kornakov, J. Adamczewski-Musch, L. Maier, Laura Fabbietti, J. Siebenson, B. Ramstein, P. Strzempek, M.B. Golubeva, P. Rodriguez-Ramos, P. Chudoba, J. Biernat, A. K. Kurilkin, S. Linev, A. Lebedev, B. W. Kolb, Andrey Reshetin, R. Holzmann, J. Markert, V. Metag, V. Pechenov, A. Rost, A. Belounnas, S. Maurus, T. Heinz, M. Traxler, R. H. Munzer, D. M. Mihaylov, M. Lorenz, B. Kardan, O. Petukhov, O. Vazquez-Doce, A. V. Sarantsev, C. Behnke, J. C. Berger-Chen, P. Tlusty, Kirill Lapidus, V. Mikhaylov, A. Malige, F. Seck, H. Tsertos, V. A. Nikonov, P. Zumbruch, I. Koenig, Eliane Epple, S. Harabasz, O. Pechenova, N. Rathod, J. Pietraszko, C. Deveaux, R. Greifenhagen, O. Svoboda, K. Schmidt-Sommerfeld, Udai Pratap Singh, Witold Przygoda, J. Friese, T. Scheib, C. Ungethüm, P. K. Kurilkin, L. Naumann, T. Hennino, D. Wójcik, M. Szala, A. Blanco, P. Fonte, A. Ivashkin, R. Kotte, Christoph Blume, Jerzy Smyrski, S. P. Chernenko, J. Michel, and J. Wirth
Subjects: Physics, Excitation function, Particle physics, 010308 nuclear & particles physics, Branching fraction, Partial wave analysis, Nuclear Theory, Resonance, Coupling (probability), 7. Clean energy, 01 natural sciences, Baryon, Pion, 0103 physical sciences, Production (computer science), Nuclear Experiment, 010306 general physics
Abstract: Pion induced reactions provide unique opportunities for an unambiguous description of baryonic resonances and their coupling channels by means of a partial wave analysis. Using the secondary pion beam at SIS18, the two pion production in the second resonance region has been investigated to unravel the role of the $N(1520) \frac{3}{2}^-$ resonance in the intermediate $\rho$ production. Results on exclusive channels with one pion ($\pi^{-}p$) and two pions ($\pi^{+}\pi^{-}n$, $\pi^{0}\pi^{-}p$) in the final state measured in the $\pi^{-}-p$ reaction at four different pion beam momenta (0.650, 0.685, 0.733, and 0.786 GeV/c) are presented. The excitation function of the different partial waves and $\Delta\pi$, $N\sigma$ and $N\rho$ isobar configurations is obtained, using the Bonn-Gatchina partial wave analysis. The $N(1520) \frac{3}{2}^-$ resonance is found to dominate the $N\rho$ final state with the branching ratio $BR=12.2 \pm 1.9\%$.
Published: 2020

14. Identical pion intensity interferometry at $\sqrt{s_{\mathrm{NN}}}=2.4~\hbox {GeV}$: HADES collaboration

Author: Christoph Blume, Marek Palka, O. V. Fateev, I. Koenig, S. Harabasz, F. Seck, Ilya Selyuzhenkov, P. Tlusty, P. Strzempek, C. Franco, A. Dybczak, J. C. Berger-Chen, J. Biernat, Tatiana Karavicheva, C. Behnke, C. Wendisch, J. Dreyer, B. W. Kolb, Alexander Belyaev, B. Ramstein, L. Silva, A. Blanco, P. Fonte, S. Spataro, T. Matulewicz, S. Hlavac, Laura Fabbietti, A. Ivashkin, R. Kotte, K. Nowakowski, C. Deveaux, R. Greifenhagen, I. Fröhlich, C. Höhne, M. G. Wiebusch, T. Heinz, A. Sadovsky, O. Svoboda, P. Zumbruch, P. Salabura, H. Tsertos, E. Usenko, L. Chlad, M. Lorenz, Andrey Reshetin, L. Lopes, J. Siebenson, Joachim Stroth, Roman Gernhäuser, E. Epple, S. Maurus, A. Kugler, G. Kornakov, H. Schuldes, R. H. Munzer, D. M. Mihaylov, J. Friese, A. Rost, T. Galatyuk, F. Kornas, F. Scozzi, J. Adamczewski-Musch, E. Schwab, L. Naumann, R. Holzmann, P. Rosier, L. Maier, J. Markert, Krzysztof Piasecki, T. Kunz, S. Ramos, B. Kämpfer, S. Spies, J. A. Garzón, Witold Przygoda, G. Korcyl, R. Lalik, A.P. Ierusalimov, M. Gumberidze, T. Scheib, C. Sturm, T. Hennino, B. Kardan, M. Böhmer, A. Mangiarotti, Sergey V. Morozov, O. Petukhov, Fedor Guber, Oliver Werner Arnold, V. P. Ladygin, Yu.V. Zanevsky, S. P. Chernenko, Volker Metag, J. Michel, J. Wirth, M. B. Golubeva, P. Rodriguez-Ramos, Yu. G. Sobolev, M. Szala, C. Müntz, A. K. Kurilkin, O. Pechenova, J. Pietraszko, P. Filip, K. Lapidus, V. Pechenov, P. Bordalo, D. Wójcik, Y. Parpottas, A. Lebedev, A. Belounnas, A. B. Kurepin, M. Traxler, W. Koenig, H. Ströbele, V. Wagner, T. Mahmoud, P. Sellheim, P. K. Kurilkin, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and HADES
Subjects: Nuclear and High Energy Physics, dimension: 3, media_common.quotation_subject, interferometer, transverse momentum: low, Extrapolation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, beam: energy, energy dependence, Nuclear physics, Pion, 0103 physical sciences, Perpendicular, correlation function, Eccentricity (behavior), 010306 general physics, Nuclear Experiment, impact parameter, media_common, pi pi, Physics, energy: high, 010308 nuclear & particles physics, Plane (geometry), Transverse plane, Correlation function (statistical mechanics), 2.4 GeV-cms/nucleon, HADES, space-time, Impact parameter
Abstract: High-statistics $$\pi ^-\pi ^-$$π-π- and $$\pi ^+\pi ^+$$π+π+ femtoscopy data are presented for Au + Au collisions at $$\sqrt{s_\mathrm{NN}} = 2.4~\hbox {GeV}$$sNN=2.4GeV, measured with HADES at SIS18/GSI. The experimental correlation functions allow the determination of the space-time extent of the corresponding emission sources via a comparison to models. The emission source, parametrized as three-dimensional Gaussian distribution, is studied in dependence on pair transverse momentum, azimuthal emission angle with respect to the reaction plane, collision centrality and beam energy. For all centralities and transverse momenta, a geometrical distribution of ellipsoidal shape is found in the plane perpendicular to the beam direction with the larger extension perpendicular to the reaction plane. For large transverse momenta, the corresponding eccentricity approaches the initial eccentricity. The eccentricity is smallest for most central collisions, where the shape is almost circular. The magnitude of the tilt angle of the emission ellipsoid in the reaction plane decreases with increasing centrality and increasing transverse momentum. All source radii increase with centrality, largely exhibiting a linear rise with the cube root of the number of participants. A substantial charge-sign difference of the source radii is found, appearing most pronounced at low transverse momentum. The extracted source parameters are consistent with the extrapolation of their energy dependence down from higher energies.
Published: 2020

15. Correlated pion-proton pair emission off hot and dense QCD matter

Author: S. Spataro, I. Fröhlich, A. K. Kurilkin, R. Holzmann, J. Markert, S. Ramos, C. Franco, V. P. Ladygin, L. Lopes, H. Ströbele, V. Wagner, P. Filip, C. Wendisch, Joachim Stroth, Tatiana Karavicheva, C. Behnke, E. Usenko, O. Pechenova, O. V. Fateev, M. Böhmer, A. Mangiarotti, E. Schwab, P. Bordalo, L. Fabbietti, S. Harabasz, J. Pietraszko, A.P. Ierusalimov, Witold Przygoda, C. Deveaux, F. Kornas, C. Sturm, Y. Parpottas, H. Schuldes, R. Greifenhagen, L. Silva, O. Svoboda, K. Pysz, T. Scheib, T. Galatyuk, A. Lebedev, C. Höhne, M. G. Wiebusch, F. Scozzi, K. Nowakowski, A. Belounnas, A. B. Kurepin, M. Traxler, T. Heinz, Yu. G. Sobolev, J. Adamczewski-Musch, J. Dreyer, Alexander Belyaev, L. Naumann, H. Tsertos, B. W. Kolb, C. Müntz, J. Friese, Izabela Ciepał, P. Zumbruch, P. Salabura, M. Lorenz, W. Koenig, B. Kämpfer, Sergey V. Morozov, P. K. Kurilkin, V. Pechenov, Yu.V. Zanevsky, G. Kornakov, M. B. Golubeva, P. Rodriguez-Ramos, A. Malige, G. Korcyl, R. Lalik, E. Epple, P. Rosier, L. Maier, S. Hlavac, J. A. Garzón, Udai Pratap Singh, J. C. Berger-Chen, F. Seck, M. Kohls, J. Siebenson, S. Maurus, M. Gumberidze, Roman Gernhäuser, A. Kugler, I. Koenig, Ilya Selyuzhenkov, S. Spies, L. Chlad, N. Rathod, B. Kardan, O. Petukhov, Fedor Guber, Oliver Werner Arnold, B. Ramstein, T. Matulewicz, A. Sadovsky, A. Blanco, P. Fonte, A. Ivashkin, R. Kotte, Christoph Blume, M. Szala, T. Mahmoud, P. Sellheim, A. Rost, Jerzy Smyrski, K. Lapidus, T. Hennino, D. Wójcik, S. P. Chernenko, Volker Metag, J. Michel, J. Wirth, Krzysztof Piasecki, T. Kunz, P. Tlusty, Andrey Reshetin, R. H. Munzer, D. M. Mihaylov, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)
Subjects: energy [excited state], Proton, Freezeout, transverse momentum dependence, 01 natural sciences, energy [hadron], Invariant mass, heavy-ion reactions, Nuclear Experiment (nucl-ex), Nuclear Experiment, mass [Delta(1232)], Physics, Baryonic resonances, Heavy-ion reactions, education.field_of_study, fireball, Breit-Wigner, hadron: energy, pi p: correlation, kinetic [energy], ddc, Isospin, Nucleon, Nuclear and High Energy Physics, 2.42 GeV-cms/nucleon, QC1-999, Population, correlation [pi p], FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], transverse momentum, Kinetic energy, Nuclear physics, isospin, Pion, 0103 physical sciences, Delta(1232): mass, matter [quantum chromodynamics], ddc:530, 010306 general physics, education, quantum chromodynamics: matter, energy: kinetic, 010308 nuclear & particles physics, background, excited state: energy, rapidity, HADES, freezeout, Energy (signal processing)
Abstract: In this letter we report the first multi-differential measurement of correlated pion-proton pairs from 2 billion Au+Au collisions at \sqrt{s_{NN}} = 2.42 GeV collected with HADES. In this energy regime the population of \Delta(1232) resonances plays an important role in the way energy is distributed between intrinsic excitation energy and kinetic energy of the hadrons in the fireball. The triple differential d3N/dM{\pi}pdpTdy distributions of correlated {\pi}p pairs have been determined by subtracting the {\pi}p combinatorial background using an iterative method. The invariant-mass distributions in the \Delta(1232) mass region show strong deviations from a Breit-Wigner function with vacuum width and mass. The yield of correlated pion-proton pairs exhibits a complex isospin, rapidity and transverse-momentum dependence. In the invariant mass range 1.1 < Minv (GeV/c2) < 1.4, the yield is found to be similar for {\pi}+p and {\pi}-p pairs, and to follow a power law ^{\alpha}, where is the mean number of participating nucleons. The exponent {\alpha} depends strongly on the pair transverse momentum (pT) while its pT-integrated and charge-averaged value is {\alpha} = 1.5 \pm 0.08stat \pm 0.2sys., Comment: 9 pages, 9 figures
Published: 2020
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16. Exploring time like tranistions in pp, πp and AA reactions with HADES

Author: Roman Gernhäuser, A. Kugler, S. Spies, P. Chudoba, Sergey V. Morozov, R. Greifenhagen, Vikram Patel, M. Lorenz, M. B. Golubeva, P. Rodriguez-Ramos, C. Müntz, P. Wintz, Krzysztof Piasecki, J. Stumm, T. Mahmoud, Christoph Blume, T. Galatyuk, B. Kardan, Burkhard Kampfer, B. Ramstein, A. Kozela, J. Dreyer, Alexander Belyaev, A. Prozorov, T. Matulewicz, O. Petukhov, J. Friese, A. Malige, US Singh, D. Dittert, A. Lebedev, A. Rost, G. Kornakov, V. Pechenov, Piotr Salabura, K. H. Kampert, A. Zhilin, S. Maurus, L. Naumann, C. Wendisch, P. Tlusty, M. Gumberidze, F. Scozzi, J. Adamczewski-Musch, F. Seck, C. Höhne, M. G. Wiebusch, A. Belounnas, Fedor Guber, S. Harabasz, M. Traxler, O. Pechenova, A.A. Weber, F. Kornas, Izabela Ciepał, S. Fateev, J. Pietraszko, M. Böhmer, A.P. Ierusalimov, K. Nowakowski, O. Svoboda, W. Koenig, S. Lebedev, Laura Fabbietti, J. Kuboś, Oleg Golosov, P. Kulesa, C. Pauly, S. Borisenko, L. Chlad, N. Rathod, W.A. Esmail, H. Ströbele, L. Ritman, P. Zumbruch, P. Salabura, Andrey Reshetin, V. Wagner, R. Holzmann, A. Blanco, I. Kres, J. Förtsch, P. Fonte, J. Markert, A. Ivashkin, R. Kotte, Gennady Lykasov, V. P. Ladygin, S. Linev, K. Pysz, B. Arnoldi-Meadows, C. Ungethüm, O. Vazquez-Doce, H. Huck, D. Pfeifer, Witold Przygoda, R. Hensch, L. Lopes, Joachim Stroth, J.-H. Otto, I. Shabanov, R. Lalik, I. Fröhlich, I. Selyuzhenkov, I. Koenig, Volker Metag, J. Michel, J. Wirth, M. Szala, Michael Dürr, Jerzy Smyrski, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and HADES
Subjects: p p: scattering, Photon, heavy ion: scattering, Meson, pi p: scattering, QC1-999, Nuclear Theory, Astrophysics::Cosmology and Extragalactic Astrophysics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, dilepton, Nuclear physics, photon: massive, meson: coupling, 0103 physical sciences, transition: electromagnetic, ddc:530, Vector meson, 010306 general physics, Nuclear Experiment, enhancement, QCD matter, quantum chromodynamics: matter, Physics, form factor: transition, 010308 nuclear & particles physics, Scattering, Computer Science::Information Retrieval, High Energy Physics::Phenomenology, vector meson, Baryon, baryon, HADES, Excited state, High Energy Physics::Experiment, Nucleon
Abstract: NSTAR 2019, Bonn, Germany, 10 Jun 2019 - 14 Jun 2019; The European physical journal / Web of Conferences 241, 01013 (2020). doi:10.1051/epjconf/202024101013, Published by EDP Sciences, Les Ulis
Published: 2020

17. Production and electromagnetic decay of hyperons: a feasibility study with HADES as a Phase-0 experiment at FAIR

Author: Burkhard Kampfer, G. Kornakov, H.P. Zbroszczyk, K. Nowakowski, O. Svoboda, J. Saraiva, R. Greifenhagen, H. Huck, L. Chlad, J. Kuboś, C. Wendisch, M. Strikhanov, J. Szewczyk, M. Wasiluk, A.A. Weber, P. Chudoba, T. Matulewicz, T. Galatyuk, M. Szala, K. Pysz, S. Linev, I. Koenig, L. Naumann, Ilya Selyuzhenkov, F. Kornas, M. Kohls, Witold Przygoda, Manfred Sobiella, Sergey V. Morozov, V. Kedych, B. Kardan, E. Schwab, T. Heinz, O. Petukhov, B. Ramstein, Krzysztof Piasecki, J. Adamczewski-Musch, A. Prozorov, F. Scozzi, M. Grunwald, J. Ritman, C. Müntz, M. Lorenz, P. Kulessa, D. Grzonka, D. Pfeifer, A. Zhilin, N. Schild, Fedor Guber, A.P. Ierusalimov, J. Friese, V. Khomyakov, V. Serdyuk, J. Regina, G. I. Lykasov, Jerzy Smyrski, N. Rathod, P. Wintz, A. Shabanov, Arkadiy Taranenko, A. Kugler, M. Gumberidze, J. Rieger, I. Fröhlich, G. Perez Andrade, A. Rost, H. Ströbele, J. Michel, B. Heybeck, S. Spies, A. Malige, A. Rustamov, B. Włoch, I. Georgadze, C. Charlotte, V. Wagner, A. Blanco, P. Fonte, Andrey Reshetin, O. Pechenova, Udai Pratap Singh, A. Ivashkin, R. Kotte, J. Pietraszko, Christoph Blume, K. Sumara, S. Reznikov, A. Kozela, Karin Schönning, S. Orfanitsky, V. Pechenov, D. Dittert, A.I. Zinchenko, W. Koenig, P. Tlusty, D.S. Borisenko, A. Derichs, C. Pauly, W.A. Esmail, S. Lebedev, V. Kozlov, C. Le Galliard, I. Kres, J. Förtsch, R. Lalik, L. Lopes, M. Imre, Joachim Stroth, M. B. Golubeva, P. Rodriguez-Ramos, J.-H. Otto, Izabela Ciepał, M. Holona, A. Lebedev, M. Traxler, Vikram Patel, J. Dreyer, Alexander Belyaev, K. H. Kampert, F. Seck, Oleg Golosov, P. Zumbruch, P. Salabura, C. Höhne, E. Zherebzova, R. Holzmann, J. Markert, V. P. Ladygin, O. V. Fateev, S. Harabasz, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), HADES, and PANDA
Subjects: Lambda(1520): electromagnetic decay, p p: scattering, Nuclear and High Energy Physics, Particle physics, hyperon: electromagnetic decay, hydrogen: liquid, Physics::Instrumentation and Detectors, polymer, Hadron, FOS: Physical sciences, Elementary particle, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Lambda, 01 natural sciences, Subatomär fysik, Particle decay, Subatomic Physics, 0103 physical sciences, Lambda(1405): electromagnetic decay, ddc:530, Darmstadt GSI FAIR, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Xi-: production, Regular Article - Experimental Physics, Nuclear Physics, Heavy Ions, Hadrons, Particle and Nuclear Physics, Nuclear Fusion, p p: interaction, hydrogen: target, Physics, forward spectrometer, Sigma(1385): electromagnetic decay, energy: kinetic, 010308 nuclear & particles physics, Lambda(1405), PANDA, Hyperon, Order (ring theory), 4.5 GeV/nucleon, ddc, Baryon, HADES, Sigma(1385), upgrade, Production (computer science), High Energy Physics::Experiment, performance, acceptance
Abstract: A feasibility study has been performed in order to investigate the performance of the HADES detector to measure the electromagnetic decays of the hyperon resonances $\Sigma(1385)^0$, $\Lambda(1405)$ and $\Lambda{\Lambda}(1520)$ as well as the production of double strange baryon systems $\Xi^-$ and $\Lambda\Lambda$ in p+p reactions at a beam kinetic energy of 4.5 GeV. The existing HADES detector will be upgraded by a new Forward Detector, which extends the detector acceptance into a range of polar angles that plays a crucial role for these investigations. The analysis of each channel is preceded by a consideration of the production cross-sections. Afterwards the expected signal count rates using a target consisting of either liquid hydrogen or polyethylene are summarized., Comment: Draft prepared by Rafa{\l} Lalik, James Ritman, Piotr Salabura, 19 pages, 21 figures, 4 tables
Published: 2020
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18. Activation Measurements of Cross Sections for Ground and Isomeric States Production in Neutron Threshold Reactions on Y and Au

Author: M. Szuta, Mitja Majerle, E. Strugalska-Gola, Stanislaw Kilim, Milan Štefánik, A. Kugler, J. Vrzalova, O. Svoboda, A Krása, P. Chudoba, M. Bielewicz, V. Wagner, and Martin Suchopar
Subjects: Physics, education.field_of_study, 010308 nuclear & particles physics, Population, chemistry.chemical_element, Nuclear data, Yttrium, 01 natural sciences, Nuclear physics, Cross section (physics), Nuclear Energy and Engineering, chemistry, 0103 physical sciences, Neutron source, Neutron, 010306 general physics, education, Excitation, Neutron activation
Abstract: The paper describes cross-section measurements consisting of neutron activation using a 7Li(p,n) quasi mono-energetic neutron source and gamma-ray spectrometry performed at the Nuclear Physics Institute of the Czech Academy of Sciences in Řež, Czech Republic. The analysis of the excitation functions of neutron-induced threshold reactions for the energy range from 17 up to 34 MeV is presented. The cross sections for the population of both ground and isomeric states were measured in yttrium and gold. A comprehensive comparison of the measured cross sections with earlier experimental data from the EXFOR database, TALYS calculations, and evaluated nuclear data libraries is presented.
Published: 2018

19. Neutron irradiation study of silicon photomultipliers from different vendors

Author: S. G. Reznikov, A. Kugler, V. Mikhaylov, V. P. Ladygin, V. Kushpil, O. Svoboda, P. Tlustý, and Svetlana Kushpil
Subjects: Physics, Nuclear and High Energy Physics, medicine.medical_specialty, Photomultiplier, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Physics::Medical Physics, 01 natural sciences, Calorimeter, Silicon photomultiplier, Neutron flux, 0103 physical sciences, medicine, Optoelectronics, Neutron, Medical physics, Irradiation, 010306 general physics, business, Neutron irradiation, Instrumentation, Radiation hardening
Abstract: We present recent results on the investigation of the KETEK, ZECOTEK, HAMAMATSU and SENSL SiPM properties after irradiation by the 6–35 MeV neutrons. The typical neutron fluence was about 1012n/cm2. The changing of the internal structure of the irradiated SiPMs was studied by the measuring of the C–V and C–f characteristics. We have observed the strong influence of the SiPM manufacturing technology on their radiation hardness. The application of the obtained results to the development of the readout electronics is discussed.
Published: 2017

20. Strong Absorption of Hadrons with Hidden and Open Strangeness in Nuclear Matter

Author: Grzegorz Korcyl, S. P. Chernenko, V. Metag, L. Chlad, T. Hennino, O. V. Fateev, J. A. Garzón, J. Michel, T. Mahmoud, D. Dittert, L. Silva, A. Blanco, P. Fonte, P. Chudoba, M. Lorenz, Yu.V. Zanevsky, V. P. Ladygin, A. Ivashkin, J. Dreyer, Alexander Belyaev, R. Kotte, A. Prozorov, K. Nowakowski, S. Spataro, S. Linev, P. Sellheim, V. Pechenov, J. Wirth, T. Kunz, T. Heinz, T. Galatyuk, H. Tsertos, P. Zumbruch, P. Rodriguez-Ramos, J. Kuboś, C. Behnke, P. Salabura, A. Rost, S. Harabasz, H. Schuldes, I. Fröhlich, M.B. Golubeva, A. K. Kurilkin, M. Szala, Sergey V. Morozov, P. Tlusty, Kirill Lapidus, O. Vazquez Doce, T. Scheib, V. Mikhaylov, Christoph Blume, H. Ströbele, Izabela Ciepał, L. Maier, O. Pechenova, A. Malige, B. Kämpfer, V. Wagner, W. Koenig, F. Seck, L. Lopes, Andrey Reshetin, Yiannis Parpottas, J. Pietraszko, C. Ungethüm, S. Maurus, Oliver Werner Arnold, Eliane Epple, M. Gumberidze, C. Höhne, M. G. Wiebusch, C. Wendisch, R. H. Munzer, D. M. Mihaylov, Roman Gernhäuser, Alexey Kurepin, A. Kugler, E. T. Atomssa, Jerzy Smyrski, B. Ramstein, S. Spies, J. Siebenson, E. Schwab, B. Kardan, Laura Fabbietti, C. Müntz, O. Petukhov, A. Sadovsky, P. Strzempek, J. Biernat, R. Holzmann, N. Rathod, J. Stroth, J. Markert, A.P. Ierusalimov, P. K. Kurilkin, R. Lalik, A. Lebedev, F. Kornas, A. Belounnas, M. Traxler, F.F. Guber, M. Böhmer, Catalina Curceanu, B. W. Kolb, F. Scozzi, J. Adamczewski-Musch, Alessandro Scordo, I. Koenig, J. C. Berger-Chen, G. Kornakov, C. Franco, C. Deveaux, R. Greifenhagen, O. Svoboda, K. Schmidt-Sommerfeld, J. Friese, Witold Przygoda, K. Piscicchia, L. Naumann, D. Wójcik, C. Sturm, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), HADES, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Meson, Hadron, FOS: Physical sciences, General Physics and Astronomy, Strangeness, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], meson, 01 natural sciences, Nuclear physics, Momentum, strangeness, K-: absorption, 0103 physical sciences, strong coupling, Nuclear Experiment (nucl-ex), 010306 general physics, Absorption (electromagnetic radiation), Nuclear Experiment, Physics, nucleus, hadron: absorption, Coupling (probability), Nuclear matter, Neutron star, Automatic Keywords, HADES, nuclear matter, beam: momentum, Elementary Particles and Fields, acceptance
Abstract: We present the first observation of K- and \phi absorption within nuclear matter by means of \pi- -induced reactions on C and W targets at an incident beam momentum of 1.7 GeV/c studied with HADES at SIS18/GSI. The double ratio (K-/K+)W / (K-/K+)C is found to be 0.319 \pm 0.009(stat)+0.014-0.012 (syst) indicating a larger absorption of K- in heavier targets as compared to lighter ones. The measured \phi/K- ratios in \pi-+C and \pi^- +W reactions within the HADES acceptance are found to be equal to $0.55 \pm 0.03(stat)+0.06-0.07$ (syst) and to $0.63 \pm 0.05(stat)-0.11+0.11$ (syst), respectively. The similar ratios measured in the two different reactions demonstrate for the first time experimentally that the dynamics of the \phi meson in nuclear medium is strongly coupled to the K- dynamics. The large difference in the \phi production off C and W nuclei is discussed in terms of a strong \phiN in-medium coupling., Comment: 6 pages, 3 figures
Published: 2019

21. The very forward hadron calorimeter PSD for the future CBM@FAIR experiment

Author: Alexander Ivashkin, Fedor Guber, A. Kugler, O. Svoboda, I. Selyuzhenkov, V. Mikhaylov, A. Senger, Viktor Klochkov, M. Golubeva, P. Tlustý, V. Kushpil, S. V. Morozov, and XXIV International Baldin Seminar on High Energy Physics Problems 'Relativistic Nuclear Physics and Quantum Chromodynamics' (Baldin ISHEPP XXIV)
Subjects: Physics, Large Hadron Collider, Calorimeter (particle physics), 010308 nuclear & particles physics, Projectile, Physics::Instrumentation and Detectors, QC1-999, Detector, Nuclear Theory, 01 natural sciences, Nuclear physics, 0103 physical sciences, Neutron, Rapidity, ddc:530, Supermodule, 010306 general physics, Nuclear Experiment, Beam (structure)
Abstract: The Projectile Spectator Detector (PSD) of the CBM experiment at the future FAIR facility is a compensating lead-scintillator calorimeter designed to measure the energy distribution of the forward going projectile nucleons and nuclei fragments (reaction spectators) produced close to the beam rapidity. The detector performance for the centrality and reaction plane determination is reviewed based on Monte-Carlo simulations of gold-gold collisions by means of four different heavy-ion event generators. The PSD energy resolution and the linearity of the response measured at CERN PS for the PSD supermodule consisting of 9 modules are presented. Predictions of the calorimeter radiation conditions at CBM and response measurement of one PSD module equipped with neutron irradiated MPPCs used for the light read out are discussed.
Published: 2019

22. Time-like baryon transitions studies with HADES

Author: A. Blanco, P. Fonte, A. Ivashkin, R. Kotte, V. Kushpil, C. Wendisch, A. Lebedev, P. Wintz, L. Silva, S. Morozov, K. Nowakowski, A. Belounnas, A. B. Kurepin, J. Kuboś, Manfred Sobiella, C. Müntz, M. Traxler, C. Deveaux, P. Tlusty, R. Greifenhagen, E. Schwab, Christoph Blume, S. Spataro, Arkadiy Taranenko, V. Mikhaylov, T. Heinz, H. Tsertos, I. Fröhlich, O. Svoboda, M. Liu, A.I. Zinchenko, B. Kardan, F. Kornas, A. Kozela, D. Pfeifer, K. H. Kampert, B. Kämpfer, R. Lalik, O. Petukhov, M. Lorenz, V. Pechenov, B. Włoch, L. Lopes, M. Gumberidze, A.P. Ierusalimov, T. Galatyuk, F. Seck, W. Koenig, C. Pauly, P. K. Kurilkin, Fedor Guber, Joachim Stroth, P. Chudoba, S. Harabasz, C. Franco, L. Naumann, P. Bordalo, Oliver Werner Arnold, M. Zuschke, Laura Fabbietti, R. Holzmann, H. Schuldes, J. Pietraszko, J. Markert, T. Hennino, I. Koenig, Vikram Patel, Andrey Reshetin, D. Dittert, Roman Gernhäuser, G. Kornakov, A. Kugler, Ilya Selyuzhenkov, Grzegorz Korcyl, V. Khomyakov, Y. Parpottas, S. Ramos, D. M. Mihaylov, M. Kajetanowicz, L. Chlad, Anna Carolina Toledo da Cunha Pereira, M. Böhmer, J. Dreyer, Alexander Belyaev, Izabela Ciepał, V. Petousis, S. Spies, A. Rost, V. P. Ladygin, S. Linev, Witold Przygoda, A. Gillitzer, L. Ritman, P. Zumbruch, O. V. Fateev, Victor Ivanov, P. Salabura, A. Zhilin, T. Kunz, H. Ströbele, B. Ramstein, F. Scozzi, M. B. Golubeva, Gennady Lykasov, J. Adamczewski-Musch, P. Rodriguez-Ramos, A. Sadovsky, M. Himmelreich, V. Wagner, C. Höhne, T. Mahmoud, M. G. Wiebusch, J. Friese, P. Sellheim, S. Maurus, P. Strzempek, J. Biernat, J. A. Garzón, Tatiana Karavicheva, A. Troyan, K. Pysz, T. Scheib, B. Arnoldi-Meadows, Volker Metag, J. Michel, J. Wirth, O. Pechenova, M. Szala, Jerzy Smyrski, Alexander Malakhov, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), HADES, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: p p: scattering, Meson, QC1-999, Nuclear Theory, off-shell, hyperon, 01 natural sciences, Resonance (particle physics), electron: pair production, Nuclear physics, transition: electromagnetic, 0103 physical sciences, Elementary reaction, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], talk: Krakow 2018/06/07, ddc:530, structure, pi: beam, Vector meson, Nuclear Experiment, 010306 general physics, Physics, Range (particle radiation), 1-3.5 GeV-cms/nucleon, 010308 nuclear & particles physics, nucleon, Hyperon, matter: effect, vector meson, Darmstadt Lab, Baryon, HADES, kinematics, baryon resonance: production, Physics::Accelerator Physics, High Energy Physics::Experiment, Nucleon, experimental results
Abstract: The HADES collaboration uses the e+e−production as a probe of the resonance matter produced in collisions at incident energies of 1-3.5 GeV/nucleon at GSI. Elementary reactions provide useful references for these studies and give information on resonance Dalitz decays (R→Ne+e−). Such processes are sensitive to the structure of time-like electromagnetic baryon transitions in a kinematic range where (off-shell) vector mesons play a crucial role. Results obtained in proton-proton reactions and in a commissioning pion-beam experiment are reported and prospects for future pion beam experiments and for first hyperon Dalitz decay measurements are described. The connection with the investigations of medium effects to be continued with HADES in the next years at SIS18 and SIS100 is also discussed.
Published: 2019

23. Probing dense baryon-rich matter with virtual photons

Author: I. Koenig, J. Dreyer, Alexander Belyaev, Yiannis Parpottas, Christian Sturm, Alexey Kurepin, M. Szala, Andrey Reshetin, Christoph Blume, Yu.V. Zanevsky, Vladimir Pechenov, F.F. Guber, F. Seck, Eliane Epple, L. Silva, D. M. Mihaylov, A. Kugler, L. Lopes, V. P. Ladygin, K. Nowakowski, A. Mangiarotti, Joachim Stroth, S. Spies, A. Sadovsky, Laura Fabbietti, P. Rodriguez-Ramos, B. W. Kolb, A.P. Ierusalimov, V. Wagner, T. Scheib, J. Pietraszko, Olga Pechenova, H. Tsertos, M. Boehmer, C. Muentz, V. Metag, P. Rosier, P. Bordalo, R. Gernhaeuser, A. Dybczak, S. Maurus, S. Spataro, C. Hoehne, B. Ramstein, R. Muenzer, T. Mahmoud, J. C. Berger-Chen, Sergey V. Morozov, M. Lorenz, Malgorzata Gumberidze, L. Maier, D. Dittert, Tetyana Galatyuk, P. Sellheim, Oliver Werner Arnold, Behruz Kardan, H. Stroebele, R. Holzmann, S. Hlavac, A. Rost, S. Ramos, P. Salabura, G. Korcyl, J. A. Garzón, R. Lalik, A. K. Kurilkin, Yu. G. Sobolev, Jörn Adamczewski-Musch, Marek Palka, Wolfgang Koenig, Tatiana Karavicheva, Ilya Selyuzhenkov, Erwin Schwab, J. Siebenson, C. Behnke, T. Hennino, P. K. Kurilkin, P. Filip, M. G. Wiebusch, B. Kaempfer, E. Usenko, P. Strzempek, O. Petukhov, J. Biernat, A. Blanco, P. Fonte, H. Schuldes, A. Ivashkin, Torsten Heinz, L. Chlad, R. Kotte, F. Scozzi, O. V. Fateev, C. Franco, I. Froehlich, Peter Zumbruch, S. Harabasz, A. Lebedev, G. Kornakov, A. Belounnas, M. Traxler, Jochen Markert, Christian Wendisch, C. Deveaux, R. Greifenhagen, L. Naumann, O. Svoboda, Witold Przygoda, J. Friese, T. Kunz, M.B. Golubeva, P. Tlusty, Kirill Lapidus, S. P. Chernenko, J. Michel, J. Wirth, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), HADES, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Big Bang, radiation: electromagnetic, Photon, heavy ion: scattering, Strong interaction, General Physics and Astronomy, Virtual particle, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, 010305 fluids & plasmas, Nuclear physics, decoupling, pressure, photon: emission, 0103 physical sciences, 010306 general physics, neutron star, QCD matter, quantum chromodynamics: matter, Quantum chromodynamics, Physics, electron positron, matter: strong interaction, High Energy Physics::Phenomenology, big bang, Baryon, 13. Climate action, Quark–gluon plasma, spectral, High Energy Physics::Experiment, photon: virtual
Abstract: International audience; About 10 μs after the Big Bang, the universe was filled—in addition to photons and leptons—with strong-interaction matter consisting of quarks and gluons, which transitioned to hadrons at temperatures close to kT = 150 MeV and densities several times higher than those found in nuclei. This quantum chromodynamics (QCD) matter can be created in the laboratory as a transient state by colliding heavy ions at relativistic energies. The different phases in which QCD matter may exist depend for example on temperature, pressure or baryochemical potential, and can be probed by studying the emission of electromagnetic radiation. Electron–positron pairs emerge from the decay of virtual photons, which immediately decouple from the strong interaction, and thus provide information about the properties of QCD matter at various stages. Here, we report the observation of virtual photon emission from baryon-rich QCD matter. The spectral distribution of the electron–positron pairs is nearly exponential, providing evidence for a source of temperature in excess of 70 MeV with constituents whose properties have been modified, thus reflecting peculiarities of strong-interaction QCD matter. Its bulk properties are similar to the dense matter formed in the final state of a neutron star merger, as apparent from recent multimessenger observation.
Published: 2019

24. Identical pion intensity interferometry in central Au + Au collisions at 1.23 A GeV

Author: I. Koenig, O. V. Fateev, P. Bordalo, P. K. Kurilkin, Laura Fabbietti, B. Kämpfer, Y. Parpottas, C. Deveaux, R. Greifenhagen, E. Usenko, O. Svoboda, A. Dybczak, Yu.V. Zanevsky, J. C. Berger-Chen, R. Lalik, Roman Gernhäuser, C. Wendisch, M. Gumberidze, H. Schuldes, O. Pechenova, A. Kugler, R. Holzmann, J. Markert, B. Ramstein, G. Kornakov, P. Tlusty, S. Ramos, T. Galatyuk, J. Dreyer, Alexander Belyaev, F. Scozzi, A. Blanco, P. Fonte, M. B. Golubeva, S. P. Chernenko, S. Spataro, I. Fröhlich, P. Rodriguez-Ramos, A. Ivashkin, A. Lebedev, R. Kotte, J. Pietraszko, V. P. Ladygin, S. Spies, Volker Metag, L. Naumann, P. Rosier, Witold Przygoda, L. Maier, M. Böhmer, A. Mangiarotti, C. Höhne, M. G. Wiebusch, A. K. Kurilkin, E. Epple, L. Lopes, S. Maurus, J. Michel, L. Silva, Joachim Stroth, F. Seck, A. Belounnas, A. B. Kurepin, J. Friese, C. Franco, M. Traxler, K. Nowakowski, B. W. Kolb, M. Lorenz, C. Sturm, S. Hlavac, P. Filip, A. Rost, J. Adamczewski-Musch, S. Morozov, J. Wirth, T. Mahmoud, J. Siebenson, E. Schwab, P. Strzempek, M. Szala, J. A. Garzón, Andrey Reshetin, P. Sellheim, J. Biernat, A.P. Ierusalimov, R. H. Munzer, D. M. Mihaylov, T. Scheib, T. Heinz, W. Koenig, P. Zumbruch, P. Salabura, Tatiana Karavicheva, C. Behnke, Krzysztof Piasecki, T. Kunz, H. Ströbele, Christoph Blume, V. Wagner, K. Lapidus, D. Wójcik, I. Selyuzhenkov, H. Tsertos, B. Kardan, Marek Palka, O. Petukhov, S. Harabasz, Fedor Guber, T. Hennino, Oliver Werner Arnold, Grzegorz Korcyl, L. Chlad, T. Matulewicz, A. Sadovsky, Yu. G. Sobolev, C. Müntz, V. Pechenov, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), HADES, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: correlation: two-particle, Nuclear and High Energy Physics, heavy ion: scattering, dimension: 3, Gaussian, interferometer, transverse momentum: low, potential: Coulomb, Extrapolation, pi, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Computer Science::Digital Libraries, energy dependence, Nuclear physics, symbols.namesake, Pion, Correlation function, 0103 physical sciences, correlation function: two-particle, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, energy: low, Physics, 010308 nuclear & particles physics, Radius, Hanbury-Brown-Twiss effect, lcsh:QC1-999, Intensity (physics), Interferometry, HADES, symbols, lcsh:Physics, Excitation, experimental results
Abstract: We investigate identical pion HBT intensity interferometry for central Au+Au collisions at 1.23A GeV. High-statistics $\pi^-\pi^-$ and $\pi^+\pi^+$ data are measured with HADES at SIS18/GSI. The radius parameters, derived from the correlation function depending on relative momenta in the longitudinal-comoving system and parametrized as three-dimensional Gaussian distribution, are studied as function of transverse momentum. A substantial charge-sign difference of the source radii is found, particularly pronounced at low transverse momentum. The extracted Coulomb-corrected source parameters agree well with a smooth extrapolation of the center-of-mass energy dependence established at higher energies, extending the corresponding excitation functions down towards a very low energy. Our data would thus rather disfavour any strong energy dependence of the radius parameters in the low energy region., Comment: 7 pages, 5 figures, updated author and grant lists
Published: 2019

25. HADES Collaboration

Author: J. Adamczewski-Musch, A. Belyaev, A. Blanco, C. Blume, M. Böhmer, C. Asal, L. Chlad, P. Chudoba, I. Ciepał, D. Dittert, J. Dreyer, W.A. Esmail, L. Fabbietti, O. Fateev, P. Fonte, J. Friese, I. Fröhlich, J. Förtsch, T. Galatyuk, R. Gernhäuser, O. Golosov, M. Golubeva, R. Greifenhagen, M. Grunwald, D. Grzonka, F. Guber, M. Gumberidze, S. Harabasz, B. Heybeck, C. Höhne, R. Holzmann, H. Huck, A. Ierusalimov, A. Ivashkin, B. Kämpfer, K-H. Kampert, B. Kardan, V. Kedych, V. Khomyakov, I. Koenig, W. Koenig, M. Kohls, G. Korcyl, G. Kornakov, F. Kornas, R. Kotte, A. Kozela, I. Kres, W. Krueger, J. Kuboś, A. Kugler, P. Kulessa, V. Ladygin, R. Lalik, A. Lebedev, S. Lebedev, S. Linev, L. Lopes, M. Lorenz, G. Lykasov, A. Malige, J. Markert, T. Matulewicz, S. Maurus, V. Metag, J. Michel, S. Morozov, C. Müntz, L. Naumann, K. Nowakowski, J.-H. Otto, V. Patel, C. Pauly, V. Pechenov, O. Pechenova, G.P. Perez Andrade, O. Petukhov, D. Pfeifer, K. Piasecki, J. Pietraszko, A. Prozorov, W. Przygoda, K. Pysz, B. Ramstein, N. Rathod, A. Reshetin, S. Reznikov, J. Ritman, P. Rodriguez-Ramos, A. Rost, A. Rustamov, P. Salabura, J. Saraiva, N. Schild, F. Scozzi, F. Seck, I. Selyuzhenkov, A. Shabanov, U. Singh, J. Smyrski, S. Spies, M. Strikhanov, H. Ströbele, J. Stroth, K. Sumara, O. Svoboda, M. Szala, J. Szewczyk, A. Taranenko, P. Tlusty, M. Traxler, V. Wagner, M. Wasiluk, A.A. Weber, C. Wendisch, P. Wintz, J. Wirth, B. Włoch, H.P. Zbroszczyk, E. Zherebzova, A. Zhilin, A. Zinchenko, and P. Zumbruch
Subjects: Nuclear and High Energy Physics
Published: 2021

26. Reconstruction of γγ mass spectra in Ag+Ag collisions at 1.23 and 1.58 AGeV beam energies with ECal detector of the HADES experiment

Author: Andrey Reshetin, M. Gumberidze, Petr Chudoba, Piotr Salabura, A. Ivashkin, J. Pietraszko, T. Galatyuk, R. Lalik, S. Morozov, A. Shabanov, V. Pechenov, O. Petukhov, F. Guber, A. Prozorov, A. Rost, O. Svoboda, P. Tlusty, N. Rathod, and A. Kugler
Subjects: Physics, Nuclear physics, History, Thesaurus (information retrieval), Detector, Mass spectrum, Beam (structure), Computer Science Applications, Education
Abstract: HADES is a high acceptance di-electron spectrometer operating at SIS18, GSI, Germany aimed at study of hadron-proton, hadron-nucleus and nucleus-nucleus collisions at 1-4 AGeV beam energies. The new electromagnetic calorimeter (ECal) was added to the experimental setup in order to measure γ-quanta and thus extend its capabilities in study of π 0-, η-mesons, production of neutral hyperons and to improve electron-to-hadron separation for the partcles with momenta p > 300 MeV/c. The first data taking with the ECal detector was carried out in March 2019 when Ag+Ag collisions at 1.23 AGeV and 1.58 AGeV beam energies were studied. The methods of reconstruction of the γγ invariant mass spectra from these data are discussed. The analysis includes several steps: calibration of each module of the ECal detector, identification of γ-quanta, reconstruction of γγ invariant mass spectra and subtraction of combinatorial background. The obtained results show experimental capabilities of the new detector and, after efficiency corrections, will allow to normalize yields of other particles.
Published: 2020

27. Calibration of the electromagnetic calorimeter ECal of the HADES experiment

Author: S. Morozov, M. Gumberidze, D. Borisenko, J. Pietraszko, T. Galatyuk, A. Reshetin, V. Pechenov, A. Shabanov, A. Kugler, O. Petukhov, R. Lalik, N. Rathod, Petr Chudoba, A. Ivashkin, O. Svoboda, P. Tlusty, A. Rost, A. Prozorov, Piotr Salabura, and F. Guber
Subjects: Physics, History, Physics::Instrumentation and Detectors, business.industry, Calibration (statistics), Computer Science Applications, Education, Electromagnetic calorimeter, Optics, ddc:530, High Energy Physics::Experiment, Nuclear Experiment, business
Abstract: FARNESS 2019, Genova, Italy, 20 May 2019 - 25 May 2019; Journal of physics / Conference series 1667, 012039 (2020). doi:10.1088/1742-6596/1667/1/012039, Published by IOP Publ.39969, Bristol
Published: 2020

28. Characterisation of SiPM radiation hardness for application in hadron calorimeters at FAIR, CERN and NICA

Author: P. Tlustý, V. Kushpil, V. Mikhaylov, S. Morozov, O. Svoboda, Fedor Guber, A. Kugler, and A. Ivashkin
Subjects: Physics, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Scintillator, 01 natural sciences, Capacitance, 030218 nuclear medicine & medical imaging, Calorimeter, Nuclear physics, 03 medical and health sciences, 0302 clinical medicine, Silicon photomultiplier, Neutron flux, 0103 physical sciences, Breakdown voltage, Neutron, Nuclear Experiment, Instrumentation, Radiation hardening, Mathematical Physics
Abstract: Silicon PhotoMultipliers (SiPM) are an excellent choice for the scintillator light readout at hadron calorimeters due to their insensitivity to magnetic fields, low operating voltages, low cost, compactness and mechanical endurance. They are already successfully utilized in Projectile Spectator Detector (PSD) of NA61 at CERN, and will be utilized soon in PSD of CBM at FAIR and Forward Hadron CALorimeters (FHCAL) of BM@N at NICA heavy-ion collision experiments. The main issue of SiPM application is their degradation due to high neutron fluence that can reach up to 2×1011 neq/cm2 per year of the experiment operation. Multiple irradiation tests of SiPMs produced by Ketek, Zecotek, Hamamatsu and Sensl manufacturers were conducted at the cyclotron of NPI Řež with a broad neutron spectrum and total fluences in the wide range of 5×1010–6×1012 neq/cm2. Detailed characterisation of all SiPMs was performed based on dependencies of dark current on voltage, capacitance on voltage and frequency, and response to LED light on voltage. SiPM's breakdown voltage, quenching resistance, pixel capacitance, gain and signal to noise ratio were extracted from these measurements. Those parameters' dependence on neutron fluence and their variability are discussed. Performance of the PSD calorimeter module equipped with irradiated SiPMs in CERN during the beam scan with 2–80 GeV/c protons is briefly overviewed.
Published: 2020

29. Cosmic tests of Cherenkov Electromagnetic Calorimeter for the HADES experiment

Author: A. Kugler, Petr Chudoba, A. Shabanov, Andrey Reshetin, Fedor Guber, Tetyana Galatyuk, A. Rost, O. Svoboda, A. Ivashkin, O. Petukhov, and P. Tlusty
Subjects: Physics, Nuclear and High Energy Physics, Photomultiplier, Photon, COSMIC cancer database, Meson, Calorimeter (particle physics), Spectrometer, Physics::Instrumentation and Detectors, Cosmic ray, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment, Instrumentation, Cherenkov radiation
Abstract: Cherenkov Electromagnetic Calorimeter (ECAL) was recently installed to complement the dilepton spectrometer HADES currently operating at SIS18 accelerator (GSI, Darmstadt, Germany). ECAL will be used to measure the meson and photon production in heavy ion collisions at the beam energy range of 1–10 A GeV. The calorimeter will also improve the electron–hadron separation. ECAL covers forward polar angles 16 ° θ 45 ° and almost full azimuthal angle of the HADES acceptance. ECAL consists of 978 modules divided into 6 sectors. Each module consists of a lead glass Cherenkov block with light readout by a photomultiplier. The test bench to measure the light output of the ECAL modules from the cosmic muons and “in-situ” measurements at HADES are discussed. The relative energy resolution for cosmic muons was estimated during the tests.
Published: 2020

30. HADES Collaboration

Author: J. Adamczewski-Musch, O. Arnold, B. Arnoldi-Meadows, A. Belounnas, A. Belyaev, J. Biernat, A. Blanco, C. Blume, M. Böhmer, P. Bordalo, L. Chlad, P. Chudoba, I. Ciepał, C. Deveaux, D. Dittert, J. Dreyer, L. Fabbietti, O. Fateev, P. Fonte, C. Franco, J. Friese, I. Fröhlich, T. Galatyuk, J.A. Garzón, R. Gernhäuser, A. Gillitzer, O. Golosov, M. Golubeva, R. Greifenhagen, F. Guber, M. Gumberidze, S. Harabasz, T. Heinz, T. Hennino, C. Höhne, R. Holzmann, A. Ierusalimov, V. Ivanov, A. Ivashkin, B. Kämpfer, M. Kajetanowicz, K.-H. Kampert, B. Kardan, V. Khomyakov, I. Koenig, W. Koenig, G. Korcyl, G. Kornakov, F. Kornas, R. Kotte, A. Kozela, J. Kuboś, A. Kugler, T. Kunz, P. Kurilkin, V. Kushpil, V. Ladygin, R. Lalik, A. Lebedev, S. Linev, L. Lopes, M. Lorenz, G. Lykasov, T. Mahmoud, A. Malakhov, J. Markert, S. Maurus, V. Metag, J. Michel, D.M. Mihaylov, V. Mikhaylov, S. Morozov, C. Müntz, L. Naumann, K. Nowakowski, Y. Parpottas, V. Patel, C. Pauly, V. Pechenov, O. Pechenova, A. Pereira, V. Petousis, O. Petukhov, D. Pfeifer, J. Pietraszko, A.P. Prozorov, W. Przygoda, K. Pysz, S. Ramos, B. Ramstein, A. Reshetin, L. Ritman, P. Rodriguez-Ramos, A. Rost, P. Salabura, T. Scheib, H. Schuldes, E. Schwab, F. Scozzi, F. Seck, P. Sellheim, I. Selyuzhenkov, L. Silva, J. Smyrski, M. Sobiella, S. Spataro, S. Spies, M. Strikhanov, H. Ströbele, J. Stroth, P. Strzempek, O. Svoboda, M. Szala, A. Taranenko, P. Tlusty, M. Traxler, A. Troyan, H. Tsertos, V. Wagner, C. Wendisch, M.G. Wiebusch, P. Wintz, J. Wirth, B. Włoch, A. Zhilin, A. Zinchenko, and P. Zumbruch
Subjects: Nuclear and High Energy Physics
Published: 2019

31. Radiation hardness investigation of avalanche photodiodes for the Projectile Spectator Detector readout at the Compressed Baryonic Matter experiment

Author: O. Svoboda, V. Mikhaylov, A. Kugler, V. Kushpil, Svetlana Kushpil, and Pavel Tlustý
Subjects: Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Equivalent dose, Physics::Medical Physics, Nuclear Theory, Detector, Radiation, Avalanche photodiode, Semiconductor detector, Nuclear physics, Neutron, Nuclear Experiment, Instrumentation, Radiation hardening, Noise (radio)
Abstract: In this paper, we discuss results of avalanche photodiodes radiation tests for Projectile Spectator Detector at future Compressed Baryonic Matter experiment. The tests were carried out in Nuclear Physics Institute of ASCR in Řež using the cyclotron facility. Secondary neutron beam was used for irradiation because the main radiation damage in the Projectile Spectator Detector is caused by neutrons. Two types of the avalanche photodiodes from Zecotek and Ketek manufacturers were investigated. Special attention was given to the noise investigation and self-annealing after the irradiation. We have irradiated two Ketek PM3375 diodes with equivalent dose for 1 MeV neutrons equal to 2.5±0.2×10 12 n/cm 2 , and single Zecotek MAPD-3N diode with equivalent dose for 1 MeV neutrons equal to 3.4±0.2×10 12 n/cm 2 . All the types of the diodes have shown an increasing level of the noise after the irradiation. From that we can conclude that those avalanche photodiodes are not able to detect single photons anymore due to high noise levels.
Published: 2015

32. Validation of Monte Carlo simulation of neutron production in a spallation experiment

Author: W.I. Furman, Karel Katovsky, V. M. Tsoupko-Sitnikov, J. Vrzalova, P. Čaloun, O. Svoboda, V.B. Brudanin, V. Chilap, Sergey I. Tyutyunnikov, I.V. Zhuk, V. Voronko, O. V. Bukhal, Lukas Zavorka, V. Wagner, J. Adam, P. Zhivkov, M. Artiushenko, M. Suchopár, I. Mar’in, Krystsina Husak, A. A. Solnyshkin, M. Kadykov, J. Khushvaktov, V.V. Sotnikov, A.A. Baldin, Vitaly Pronskikh, and V. I. Stegailov
Subjects: Nuclear physics, Physics, Nuclotron, Nuclear Energy and Engineering, chemistry, Neutron emission, chemistry.chemical_element, Spallation, Neutron, Neutron scattering, Uranium, Natural uranium, Neutron temperature
Abstract: A renewed interest in experimental research on Accelerator-Driven Systems (ADS) has been initiated by the global attempt to produce energy from thorium as a safe(r), clean(er) and (more) proliferation-resistant alternative to the uranium-fuelled thermal nuclear reactors. The ADS research has been actively pursued at the Joint Institute for Nuclear Research (JINR), Dubna, since decades. Most recently, the emission of fast neutrons was experimentally investigated at the massive (m = 512 kg) natural uranium spallation target QUINTA. The target has been irradiated with the relativistic deuteron beams of energy from 0.5 AGeV up to 4 AGeV at the JINR Nuclotron accelerator in numerous experiments since 2011. Neutron production inside the target was studied through the gamma-ray spectrometry measurement of natural uranium activation detectors. Experimental reaction rates for (n,γ), (n,f) and (n,2n) reactions in uranium have provided valuable information about the neutron distribution over a wide range of energies up to some GeV. The experimental data were compared to the predictions of Monte Carlo simulations using the MCNPX 2.7.0 code. The results are presented and potential sources of partial disagreement are discussed later in this work.
Published: 2015

33. CBM Collaboration

Author: T. Ablyazimov, A. Abuhoza, R. Adak, J. Adamczewski-Musch, M. Adamczyk, M.M. Aggarwal, Z. Ahammed, F. Ahmad, N. Ahmad, S. Ahmad, A. Akindinov, P. Akishin, E. Akishina, T. Akishina, V. Akishina, M. Al-Turany, E. Alexandrov, I. Alexandrov, S. Amar-Youcef, M. Anđelić, O. Andreeva, C. Andrei, A. Andronic, Yu. Anisimov, H. Appelshäuser, A. Arend, D. Argintaru, E. Atkin, S. Avdeev, R. Averbeck, M.D. Azmi, V. Baban, M. Bach, E. Badura, S. Baginyan, T. Balle, T. Balog, S. Bandyopadhyay, P. Banerjee, N. Baranova, T. Barczyk, D. Bartoş, S. Bashir, Z. Basrak, M. Baszczyk, O. Batenkov, V. Baublis, C. Baumann, M. Baznat, K.-H. Becker, T. Bel, S. Belogurov, J. Bendarouach, I. Berceanu, A. Bercuci, E. Berdermann, A. Berdnikov, Y. Berdnikov, R. Berendes, C. Bergmann, D. Bertini, O. Bertini, C. Beşliu, O. Bezshyyko, P.P. Bhaduri, A. Bhasin, A.K. Bhati, B. Bhattacharjee, A. Bhattacharyya, T.K. Bhattacharyya, S. Biswas, D. Blau, C. Blume, Yu. Bocharov, S. Böttger, M. Borysova, T. Breitner, U. Brüning, J. Brzychczyk, A. Bubak, H. Büsching, A. Bychkov, A. Byszuk, Xu Cai, M. Cãlin, Ping Cao, R. Čaplar, G. Caragheorgheopol, I. Carević, V. Cătănescu, A. Chakrabarti, S. Chatterji, Sanatan Chattopadhyay, Subhasis Chattopadhyay, Hongfang Chen, Jianping Cheng, V. Chepurnov, S. Chernenko, A. Chernogorov, Kyung-Eon Choi, M.I. Ciobanu, G. Claus, F. Constantin, V. Covlea, M. Csanád, N. D'Ascenzo, S. Das, K. Davkov, V. Davkov, J. de Cuveland, B. Debnath, D. Dementiev, Zhi Deng, H. Deppe, I. Deppner, O. Derenovskaya, C.A. Deveaux, M. Deveaux, K. Dey, M. Dey, P. Dillenseger, V. Dobyrn, D. Doering, A. Dorokhov, A. Drozd, A.K. Dubey, S. Dubnichka, A. Dubnichkova, M. Dürr, W. Dulinski, L. Dutka, M. Dželalija, D. Emschermann, H. Engel, V. Eremin, T. Eşanu, J. Eschke, D. Eschweiler, Jongsik Eum, Huanhuan Fan, O. Fateev, I. Filozova, D. Finogeev, P. Fischer, H. Flemming, U. Frankenfeld, V. Friese, E. Friske, I. Fröhlich, J. Frühauf, Á. Fülöp, J. Gajda, T. Galatyuk, A. Galkin, V. Galkin, G. Gangopadhyay, C. García Chávez, I. Gašparić, J. Gebelein, P. Ghosh, S.K. Ghosh, M. Goffe, L. Golinka-Bezshyyko, V. Golovatyuk, S. Golovnya, V. Golovtsov, M. Golubeva, D. Golubkov, A. Gómez Ramírez, S. Gorbunov, S. Gorokhov, D. Gottschalk, P. Gryboś, A. Grzeszczuk, F. Guber, K. Gudima, A. Gupta, Yu. Gusakov, A. Haldar, S. Haldar, H. Hartmann, J. Hehner, K. Heidel, N. Heine, E. Hellbär, A. Herghelegiu, N. Herrmann, B. Heß, J.M. Heuser, A. Himmi, C. Höhne, R. Holzmann, Guangming Huang, Xinjie Huang, J. Hutsch, D. Hutter, E. Iakovleva, A. Ierusalimov, E.-M. Ilgenfritz, M. Irfan, M. Ivanov, Valery Ivanov, Victor Ivanov, Vladimir Ivanov, A. Ivashkin, K. Jaaskelainen, H. Jahan, V. Jain, V. Jakovlev, T. Janson, A. Jipa, I. Kadenko, B. Kämpfer, S. Kalcher, V. Kalinin, K.-H. Kampert, Tae Im Kang, E. Kaptur, R. Karabowicz, O. Karavichev, T. Karavicheva, D. Karmanov, V. Karnaukhov, E. Karpechev, K. Kasiński, G. Kasprowicz, M. Kaur, A. Kazantsev, U. Kebschull, G. Kekelidze, M.M. Khan, S.A. Khan, A. Khanzadeev, F. Khasanov, A. Khvorostukhin, V. Kirakosyan, M. Kirejczyk, A. Kiryakov, M. Kiš, I. Kisel, P. Kisel, S. Kiselev, A. Kiss, T. Kiss, P. Klaus, R. Kłeczek, Ch. Klein-Bösing, V. Kleipa, P. Kmon, K. Koch, L. Kochenda, P. Koczoń, W. König, M. Kohn, B.W. Kolb, A. Kolosova, B. Komkov, J.M. Kopfer, M. Korolev, I. Korolko, R. Kotte, A. Kotynia, A. Kovalchuk, S. Kowalski, M. Koziel, G. Kozlov, P. Kravtsov, E. Krebs, C. Kreidl, D. Kresan, G. Kretschmar, M. Kretz, M. Krieger, E. Kryshen, W. Kucewicz, L. Kudin, A. Kugler, I. Kulakov, J. Kunkel, A. Kurepin, P. Kurilkin, V. Kushpil, V. Kyva, V. Ladygin, C. Lara, P. Larionov, A. Laso Garcia, E. Lavrik, I. Lazanu, A. Lebedev, S. Lebedev, E. Lebedeva, J. Lehnert, J. Lehrbach, F. Lemke, Cheng Li, Jin Li, Qiyan Li, Yuanjing Li, Yulan Li, V. Lindenstruth, S. Linev, B. Linnik, E. Litvinenko, Feng Liu, I. Lobanov, E. Lobanova, S. Löchner, P.-A. Loizeau, J.A. Lucio Martínez, A. Lymanets, A. Maevskaya, S. Mahajan, D.P. Mahapatra, T. Mahmoud, P. Maj, Z. Majka, A. Malakhov, E. Malankin, D. Malkevich, O. Malyatina, H. Malygina, S. Mandal, V. Manko, S. Manz, V. Marin, A.M. Marin Garcia, J. Markert, S. Masciocchi, T. Matulewicz, M. Merkin, V. Mialkovski, J. Michel, N. Miftakhov, K. Mikhailov, V. Mikhaylov, B. Milanović, V. Militsija, M.F. Mir, D. Miskowiec, T. Morhardt, W.F.J. Müller, C. Müntz, Yu. Murin, R. Najman, L. Naumann, T. Nayak, A. Nedosekin, B. Neumann, W. Niebur, V. Nikulin, D. Normanov, M. Nüssle, A. Oancea, Kunsu Oh, Y. Onishchuk, D. Osipov, G. Ososkov, D. Ossetski, P. Otfinowski, E. Ovcharenko, S. Pal, I. Panasenko, N.R. Panda, S. Parzhitskiy, C. Pauly, Haiping Peng, I. Peric, D. Peshekhonov, V. Peshekhonov, V. Petráček, M. Petriş, A. Petrovici, M. Petrovici, A. Petrovskiy, O. Petukhov, K. Piasecki, J. Pieper, J. Pietraszko, R. Płaneta, E. Plekhanov, V. Plotnikov, V. Plujko, J. Pluta, V. Poliakov, P. Polozov, A. Pop, V. Popov, V. Pospisil, B.V.K.S. Potukuchi, J. Pouryamout, K. Poźniak, A. Prakash, M. Prokudin, I. Pshenichnov, M. Pugach, V. Pugatch, S. Querchfeld, L. Radulescu, S. Raha, W. Raja, F. Rami, R. Raniwala, S. Raniwala, A. Raportirenko, J. Rautenberg, J. Rauza, R. Ray, S. Razin, P. Reichelt, S. Reinecke, A. Reshetin, C. Ristea, O. Ristea, F. Roether, R. Romaniuk, A. Rost, E. Rostchin, I. Rostovtseva, A. Roy, J. Rożynek, Yu. Ryabov, V. Rykalin, A. Sadovsky, S. Sadovsky, R. Sahoo, P.K. Sahu, J. Saini, S. Samanta, S.S. Sambyal, V. Samsonov, J. Sánchez Rosado, S. Sau, V. Saveliev, S. Schatral, C. Schiaua, C.J. Schmidt, H.R. Schmidt, K. Schmidt, K. Schweda, A. Scurtu, F. Seck, S. Seddiki, I. Selyuzhenkov, A. Semennikov, A. Senger, P. Senger, A. Shabunov, Ming Shao, M.K. Sharma, N. Shumeiko, V. Shumikhin, B. Sikora, A. Simakov, C. Simon, C. Simons, R.N. Singaraju, A.K. Singh, B.K. Singh, C.P. Singh, V. Singhal, K. Siwek-Wilczyńska, L. Škoda, I. Skwira-Chalot, I. Som, Jihye Song, I. Sorokin, Z. Sosin, D. Soyk, P. Staszel, A. Stavinskiy, E. Stephan, D. Storozhyk, M. Strikhanov, S. Strohauer, J. Stroth, C. Sturm, R. Sultanov, Yongjie Sun, O. Svoboda, R. Szczygieł, R. Talukdar, Zebo Tang, M. Tanha, J. Tarasiuk, O. Tarassenkova, M.-G. Târzilă, V. Tiflov, T. Tischler, P. Tlustý, A. Toia, T. Tolyhi, N. Topil'skaya, C. Trageser, P. Trivedy, I. Tsakov, Yu. Tsyupa, A. Turowiecki, F. Uhlig, E. Usenko, I. Valin, T. Vasiliev, I. Vassiliev, E. Verbitskaya, W. Verhoeven, A. Veshikov, R. Visinka, Y.P. Viyogi, S. Volkov, Yu. Volkov, A. Vorobiev, A. Voronin, V. Vovchenko, E. Vznuzdaev, M. Vznuzdaev, Dong Wang, Yaping Wang, Wang Yi, C. Wendisch, J.P. Wessels, M. Wiebusch, J. Wiechula, B. Wiedemann, D. Wielanek, A. Wieloch, N. Winckler, M. Winter, K. Wiśniewski, D. Wohlfeld, Gy. Wolf, Won Sanguk, J. Wüstenfeld, Changzhou Xiang, Xu Nu, Jun-Gyu Yi, Zhongbao Yin, In-Kwon Yoo, Qian Yue, B. Yuldashev, I. Yushmanov, W. Zabołotny, Yu. Zaitsev, Yu. Zanevsky, M. Zhalov, Ya Peng Zhang, Yifei Zhang, Daicui Zhou, Xianglei Zhu, A. Zinchenko, W. Zipper, M. Żoładź, P. Zrelov, V. Zryuev, P. Zumbruch, and M. Zyzak
Subjects: Nuclear and High Energy Physics
Published: 2014

34. Δ(1232) Dalitz decay in proton-proton collisions at T=1.25 GeV measured with HADES at GSI

Author: V. Pechenov, C. Höhne, M. G. Wiebusch, O. Petukhov, T. Heinz, Christoph Blume, M. Lorenz, J. Siebenson, A. Dybczak, V. Petousis, S. Hlavac, E. Schwab, O. V. Fateev, J. C. Berger-Chen, A. Rost, L. Chlad, W. Kühn, B. Ramstein, E. Usenko, A. K. Kurilkin, H. Schuldes, P. Rosier, J. Pietraszko, S. Harabasz, A.P. Ierusalimov, B. Kämpfer, W. Koenig, A. Sadovsky, F. Scozzi, L. Lopes, Marek Palka, J. Adamczewski-Musch, J. A. Garzón, P. Filip, C. Sturm, M. Gumberidze, B. W. Kolb, Fedor Guber, E. Morinière, Yu. G. Sobolev, C. Müntz, C. Wendisch, T. Scheib, I. Koenig, P. Bordalo, T. Galatyuk, A. Lebedev, Oliver Werner Arnold, R. Holzmann, L. Naumann, M. Böhmer, A. Mangiarotti, L. Silva, J. Markert, B. Kardan, L. Maier, A. Belounnas, A. B. Kurepin, A. V. Sarantsev, M. Traxler, S. Ramos, K. Nowakowski, C. Deveaux, V. P. Ladygin, T. Hennino, Roman Gernhäuser, Yu.V. Zanevsky, A. Blanco, P. Fonte, A. Kugler, A. Ivashkin, R. Kotte, P. K. Kurilkin, M. B. Golubeva, P. Rodriguez-Ramos, Sergey V. Morozov, J. Stroth, R. Lalik, T. Liu, O. Svoboda, S. Spataro, I. Fröhlich, G. Kornakov, Andrey Reshetin, C. Franco, R. H. Munzer, D. M. Mihaylov, Grzegorz Korcyl, H. Tsertos, Laura Fabbietti, T. Kunz, P. Tlusty, Kirill Lapidus, Tatiana Karavicheva, C. Behnke, Witold Przygoda, S. P. Chernenko, Volker Metag, Yiannis Parpottas, J. Michel, J. Wirth, O. Pechenova, J. Friese, H. Ströbele, V. Wagner, T. Mahmoud, P. Sellheim, P. Strzempek, E. T. Atomssa, J. Biernat, Paolo Finocchiaro, S. Maurus, F. Seck, Eliane Epple, J. Dreyer, Alexander Belyaev, P. Zumbruch, and P. Salabura
Subjects: Physics, Quark, Particle physics, Proton, 010308 nuclear & particles physics, Branching fraction, Partial wave analysis, Nuclear Theory, Hadron, Kinetic energy, 01 natural sciences, Particle identification, Nuclear physics, Particle decay, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract: We report on the investigation of Δ(1232) production and decay in proton-proton collisions at a kinetic energy of 1.25 GeV measured with HADES. Exclusive dilepton decay channels ppe+e− and ppe+e−γ have been studied and compared with the partial-wave analysis of the hadronic ppπ0 channel. They allow to access both Δ+→pπ0(e+e−γ) and Δ+→pe+e− Dalitz decay channels. The perfect reconstruction of the well-known π0 Dalitz decay serves as a proof of the consistency of the analysis. The Δ Dalitz decay is identified for the first time and the sensitivity to N-Δ transition form factors is tested. The Δ(1232) Dalitz decay branching ratio is also determined for the first time; our result is (4.19 ± 0.62 syst. ± 0.34 stat.) ×10−5, albeit with some model dependence.
Published: 2017

35. Challenges in QCD matter physics --The scientific programme of the Compressed Baryonic Matter experiment at FAIR

Author: V. Jakovlev, R. Talukdar, Alberica Toia, V.M. Golovatyuk, P. Ivanov, Abhijit Bhattacharyya, M. Kohn, Yu. Onishchuk, M. Tanha, Suman Sau, E. Friske, L. Kumar, A. Roy, Valerica Baban, Yaping Wang, V. Blinov, D. Svirida, Pradip Kumar Sahu, D. Dementiev, A. Gomez Ramirez, M. Petris, Ming Shao, D. Blau, Yu. P. Tsyupa, A. Rost, D. P. Mahapatra, Y. F. Ryabov, D. Wielanek, Anju Bhasin, C. Lara, Saikat Biswas, Shusu Shi, E. P. Akishina, F. Seck, V. Jain, Hongfang Chen, O. Malyatina, B. Komkov, I. Carevic, V. Baublis, Raghunath Sahoo, D. Normanov, Tetyana Galatyuk, S. Amar-Youcef, Cristian Andrei, Yu. I. Bocharov, A. Vorobiev, M. Strikhanov, Y. Leifels, O. Petukhov, A. Petrovici, Dezso Varga, Oana Ristea, W. Verhoeven, J. Sánchez Rosado, Victor Golovtsov, S. Belogurov, E. Kryshen, M. Dey, Johannes Lehrbach, Y. P. Viyogi, A. V. Kazantsev, A. Himmi, M. Anđelić, Oleg Bezshyyko, Cheng Li, A. Raportirenko, Xu Cai, C. Kreidl, Daniela Bartos, T. Balog, Volker Lindenstruth, A. Chaus, M. Mohisin Khan, Mate Csanad, J. Pluta, A. Senger, Matthias Balzer, Christoph Blume, H. Appelshäuser, Di Jiang, B. Kämpfer, A. Lymanets, I. Berceanu, S. Gorbunov, S. Sarangi, V. Pospíšil, N. Heine, A. Veshikov, Yuanjing Li, V. Kushpil, Ch. Klein-Bösing, I. Selyuzhenkov, S. Razin, Guofeng Song, D. Belyakov, G. Berezin, V. Kyva, Andrei Ionut Herghelegiu, Heiko Engel, K. Schmidt, V. Klochkov, Alla Maevskaya, P.-A. Loizeau, L. Golinka-Bezshyyko, V.A. Karnaukhov, J. Bendarouach, C. Xiang, A.D. Sheremetiev, V. F. Chepurnov, Hr Schmidt, Zbigniew Sosin, M. Singla, I. Momot, O. Andreeva, I. Alexandrov, R. N. Singaraju, S. Avdeev, Evgeny Alexandrov, R. Płaneta, Gennady Ososkov, D. Hutter, A. Reinefeld, C.J. Schmidt, Andrei Dorokhov, Vikram Patel, K.-H. Becker, N. Kurepin, E. Lebedeva, C. P. Singh, Y. K. Sun, K. Jaaskelainen, Andras Szabo, J. Rożynek, Sanjeev Singh Sambyal, V. S. Negi, Krzysztof Piasecki, W. F. J. Müller, M. Baznat, N. Miftakhov, Feng Liu, N. Ahmad, L. Skoda, G. D. Kekelidze, Vladimir Ivanov, Krzysztof Kasinski, Xi-Wei Wang, D. Miskowiec, Serguei Volkov, Sudhir Raniwala, I. Tsakov, A. Nedosekin, Peter Senger, T. Barczyk, S. Dubnichka, C. Ristea, N.G. Tuturas, E. V. Atkin, D. Karmanov, W. Zabolotny, Tatiana Karavicheva, Subhasis Samanta, Yu.V. Zanevsky, S. Bähr, O. Batenkov, M. Petrovici, B. Milanovic, Muhammad Farooq, R. Karabowicz, I. Vassiliev, P. Staszel, Sheng Dong, Udo Wolfgang Kebschull, P. Koczon, Goutam Gangopadhyay, P. Zumbruch, Vladimir Plujko, Y. Berdnikov, Shue He, Volodymyr Vovchenko, V. Mialkovski, W. Zipper, T. Bus, O. Tarassenkova, S. K. Sahu, V. Militsija, Yu. Zaitsev, C. Müntz, S. K. Ghosh, Sushanta Tripathy, E. Rostchin, V. Shumikhin, I. Fröhlich, I. Panasenko, A. Laso Garcia, L. Dutka, Yu.S. Anisimov, B. Linnik, T. Tischler, A. Ivashkin, R. Kotte, Calin Besliu, T. Akishina, Rashmi Raniwala, Sheng Zheng, K. Koch, J. Kunkel, A. Shabunov, E. Lobanova, Wojciech Kucewicz, T. Breitner, M. Al-Turany, R. P. Adak, Claudiu Cornel Schiaua, S. Masciocchi, Zhongbao Yin, Xinjie Huang, Jens Wiechula, Nu Xu, I. Kisel, Christian Sturm, T. Mahmoud, V. Kalinin, A. Abuhoza, Mohd Danish Azmi, P. Zrelov, Jing Zhou, M. Dželalija, C. Deveaux, M. Goffe, Ke-Jun Wu, S. Strohauer, S. Bashir, D. Argintaru, B. Heß, A. Turowiecki, M. B. Golubeva, F. Ahmad, S. Gläßel, V. Plotnikov, Manuel Penschuck, Supriya Das, Grzegorz Kasprowicz, Vladislav Manko, O. Vasylyev, D. Kresan, L. Kudin, Yu. V. Gusakov, Dongdong Hu, Vladimir Nikulin, M. Ivanov, D. Gottschalk, Karl-Heinz Kampert, A. Kolosova, G. Caragheorgheopol, K. Dey, K. Mikhailov, Anand Kumar Dubey, J. Scholten, S. P. D. Figuli, T. Blank, Ajit Kumar, Vladimir Peshekhonov, Igor Pshenichnov, E. Badura, Michael Deveaux, I. Rostovtseva, M. Kiš, Jürgen Becker, Evgeny Karpechev, B. W. Kolb, Valery Pugatch, Xiaofeng Luo, I. Som, E. Ovcharenko, F.F. Guber, H. Büsching, H. Cherif, N. R. Panda, Zubayer Ahammed, R. Najman, Fouad Rami, M. Gumiński, J. Pieper, Jerzy Gajda, G. Kozlov, H. Jahan, A. Drozd, V. Butuzov, Joachim Stroth, I. K. Yoo, Thomas Janson, M. Petri, R. Holzmann, D. Finogeev, S. Golovnya, Ping Cao, E. Malankin, Buddhadeb Bhattacharjee, L. Meder, Junfeng Yang, Lei Zhao, C. Simon, S. Kuznetsov, I. Valin, M. Zyzak, H. Hartmann, T. Satława, Yi Wang, Anton Andronic, Daicui Zhou, Zebo Tang, M. Prokudin, V. Saveliev, Qiyan Li, I. M. Deppner, Mahitosh Mandal, F. Uhlig, J. A. Lucio Martínez, J. Book, L. Mik, S. Schatral, S. K. Pal, A. Petrovskiy, J. Pietraszko, B. Debnath, E. Usenko, O. Svoboda, Gy. Wolf, V.V. Elsha, J. Lehnert, Pengfei Lyu, S. Seddiki, Peter Fischer, Huanhuan Fan, D. Doering, J. Frühauf, C. Wendisch, Yu Zhang, V. Kozlov, P. Tlustý, Piotr Otfinowski, N. Baranova, Sergey Kiselev, J. Rautenberg, Dmitry Mal'kevich, I. Kadenko, I. Lobanov, Mikhail Zhalov, A. Rodriguez Rodriguez, D. Emschermann, Vikas Singhal, Pavel Akishin, M. Bach, P. Kravtsov, X. Zhu, C. Nandi, I. Korolko, Rongxing Yang, E. Nandy, D. Ivanischev, Anil Prakash, A. Semennikov, I. E. Yushmanov, S. Parzhitskiy, M. Vznuzdaev, A. Khvorostukhin, A. Kiryakov, Soma Mukherjee, LuYao Chen, M. Pugach, Piotr Kmon, J. Gebelein, V. Kleipa, C. Bergmann, Kai Schweda, S. Rabtsun, Victor Ivanov, Tivadar Kiss, M. Dreschmann, I. G. Alekseev, A. K. Kurilkin, A. Volochniuk, E. Krebs, A. Lebedev, V. Kramarenko, N. Topil'skaya, S. Das, S. Lebedev, S. Querchfeld, Madan M. Aggarwal, N.I. Zamiatin, Amrendra K. Singh, Swagata Mandal, A. Khanzadeev, C. Simons, Gilles Claus, U. Frankenfeld, V.V. Ivanov, A. Chernogorov, Pascal Dillenseger, V. Dobyrn, Z. Dubnichkova, S. Löchner, Bhartendu K. Singh, S. Ahmad, Rishat Sultanov, J. Kallunkathariyil, A. Wieloch, T. Matulewicz, R. Berendes, A. Shabanov, Saniya Khan, V. Friese, Anik Gupta, L. Kochenda, M. Kirejczyk, Pavel Kisel, Amlan Chakrabarti, Ashwini Kumar, Michal Koziel, A. Berdnikov, A. Sadovsky, T. O. Ablyazimov, S. Mahajan, M. Merkin, Robert Szczygiel, C. Pauly, Krzysztof Poźniak, F. Roether, Alexey Kurepin, Alexander Voronin, A. Bubak, Nikolai Shumeiko, Nicolas Winckler, A. V. Kryanev, Andrey Reshetin, A. Simakov, Sukalyan Chattopadhyay, E. M. Ilgenfritz, B. Sikora, Jihye Song, J. Hehner, Zhi Deng, M. Irfan, J. Saini, S. A. Lone, L. Naumann, D. Eschweiler, A. M. Marin Garcia, P. Kähler, O. Derenovskaya, A.P. Ierusalimov, Alexandru Jipa, K. Agarwal, T. Tolyhi, H. Malygina, Xingming Fan, Amalia Pop, Dmitry Golubkov, E. M. Verbitskaya, L. Radulescu, Ryszard S. Romaniuk, D. Pfeifer, Yifei Zhang, Rajarshi Ray, V. Zryuev, M. Teklishyn, M. Träger, S. Morozov, H. Flemming, A. Oancea, A. Wilms, P. Ghosh, A. Grzeszczuk, V. Mikhaylov, Patrick Simon Reichelt, Ankhi Roy, Sanguk Won, Vladimir Samsonov, T. Esanu, V. Akishina, D.V. Peshekhonov, A.I. Zinchenko, M. Żoładź, Xin Li, I. Sibiryak, J. Wüstenfeld, Aleksey Voronin, M. Korolev, Guangming Huang, A. Kugler, E. Kaptur, J. Michel, J. Tarasiuk, Manjit Kaur, A. Bychkov, F. Lemke, Bekhzod S Yuldashev, T. K. Bhattacharyya, S. Gorokhov, F. Schintke, P. Klaus, Adrian Byszuk, Ionel Lazanu, Dong Wang, Michael Dürr, M. Krieger, H. Deppe, Sibaji Raha, O. Sander, S. Kowalski, K. Wiśniewski, Alexander Malakhov, I. Filozova, Shengqin Feng, M. Calin, S. Reinecke, V. Kucher, M. Weber, A. Kovalchuk, V. Petráček, M. Adamczyk, K.K. Gudima, Johannes Peter Wessels, P. Sitzmann, J. Markert, V. K. Eremin, Alexandru Bercuci, Marc Winter, Mateusz Baszczyk, M.I. Ciobanu, E. Bao, M. Kuc, U. Brüning, O. V. Fateev, Piotr Maj, J. de Cuveland, M. G. Târzilă, Pavel Larionov, R. Averbeck, Jianping Cheng, Jacek Rauza, C. E. Muñoz Castillo, N. D'Ascenzo, O. Bertini, Wendi Deng, G. Kretschmar, I. Skwira-Chalot, W. Niebur, K. Oh, V. P. Ladygin, T. Morhardt, C. Höhne, M. G. Wiebusch, Partha Pratim Bhaduri, Dong Han, Oleg Karavichev, N. Herrmann, R. Visinka, F. Constantin, C. García Chávez, J. Brzychczyk, Sidharth Kumar Prasad, D. Soyk, V. V. Kirakosyan, W. Koenig, D. Bertini, Z. Majka, F. Khasanov, J. Eschke, P. Gryboś, E. Lavrik, V. Cătănescu, K. Siwek-Wilczyńska, P. K. Kurilkin, J.M. Heuser, Adeel Akram, Yu. Murin, Alexander Akindinov, A. K. Bhati, I. Kres, J. Förtsch, Rafal Kleczek, Jiajun Zheng, S. Manz, T. K. Nayak, Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), CBM, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), and Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: J/psi(3100), Phase transition, matter: interaction, Hadron, Nuclear Theory, hypernucleus, 7. Clean energy, 01 natural sciences, Critical point (thermodynamics), transport theory, hadron: gas, Nuclear Experiment, neutron star, QCD matter, Brookhaven RHIC Coll, quark gluon: plasma, Physics, Large Hadron Collider, fireball, elliptic flow, strong interaction, Observable, heavy ion, CERN LHC Coll, QCD matter, Quark-Gluon-Plasma (QGP), QCD phase diagram, strong interaction, hadronic matter, partonic matte, heavy-ion, 2-4.9 GeV/nucleon, Nuclear and High Energy Physics, Particle physics, CBM, charmonium, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Strong interaction, review, nonperturbative, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], symmetry: chiral, quantum chromodynamics: critical phenomena, strangeness, 0103 physical sciences, density: high, Darmstadt GSI FAIR, structure, 010306 general physics, equation of state, quantum chromodynamics: matter, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, nucleus, temperature: high, baryon, Neutron star, Automatic Keywords, HADES, charm
Abstract: International audience; Substantial experimental and theoretical efforts worldwide are devoted to explore the phase diagram of strongly interacting matter. At LHC and top RHIC energies, QCD matter is studied at very high temperatures and nearly vanishing net-baryon densities. There is evidence that a Quark-Gluon-Plasma (QGP) was created at experiments at RHIC and LHC. The transition from the QGP back to the hadron gas is found to be a smooth cross over. For larger net-baryon densities and lower temperatures, it is expected that the QCD phase diagram exhibits a rich structure, such as a first-order phase transition between hadronic and partonic matter which terminates in a critical point, or exotic phases like quarkyonic matter. The discovery of these landmarks would be a breakthrough in our understanding of the strong interaction and is therefore in the focus of various high-energy heavy-ion research programs. The Compressed Baryonic Matter (CBM) experiment at FAIR will play a unique role in the exploration of the QCD phase diagram in the region of high net-baryon densities, because it is designed to run at unprecedented interaction rates. High-rate operation is the key prerequisite for high-precision measurements of multi-differential observables and of rare diagnostic probes which are sensitive to the dense phase of the nuclear fireball. The goal of the CBM experiment at SIS100 ( $\sqrt{s_{NN}}=$ 2.7--4.9 GeV) is to discover fundamental properties of QCD matter: the phase structure at large baryon-chemical potentials ( $\mu_B > 500$ MeV), effects of chiral symmetry, and the equation of state at high density as it is expected to occur in the core of neutron stars. In this article, we review the motivation for and the physics programme of CBM, including activities before the start of data taking in 2024, in the context of the worldwide efforts to explore high-density QCD matter.
Published: 2017

36. Forward scintillation hodoscope for nuclear fragment detection at the high acceptance dielectron spectrometer (HADES) setup

Author: A. B. Kurepin, E. A. Usenko, O. Svoboda, O. Petukhov, Fedor Guber, A. Ivashkin, O. V. Andreeva, A. S. Sadovsky, A. Kugler, A. Krasa, Andrey Reshetin, P. Tlusty, M. B. Golubeva, and Yu. G. Sobolev
Subjects: Physics, Particle physics, Scintillation, Spectrometer, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Cosmic ray, Nuclear physics, Deuterium, Hodoscope, Calibration, Nuclear Experiment, Nucleon, Instrumentation, Beam (structure)
Abstract: The main characteristics of the forward scintillation hodoscope and readout electronics of the high acceptance dielectron spectrometer (HADES) at GSI (Darmstadt, Germany) are presented. Methods for adjustment and amplitude-time calibration of hodoscope detectors using cosmic rays and results of measurements of the Au + Au reaction at a beam energy of 1.24 GeV/nucleon are described. The use of the forward hodoscope for tagging the n + p reaction by means of the deuteron beam incident on a liquid hydrogen target is discussed. A procedure for determining the reaction plane angle in event-by-event analysis of the Au + Au reaction data (at 1.24 GeV/nucleon) is presented.
Published: 2014

37. Studies of (n,xn) cross-sections in Al, Au, Bi, Cu, Fe, I, In, Mg, Ni, Ta, Y, and Zn by the activation method

Author: M. Suchopár, Mitja Majerle, J. Vrzalova, A. Kugler, O. Svoboda, V. Wagner, and A. Krása
Subjects: Physics, Nuclear and High Energy Physics, Range (particle radiation), Proton, Neutron flux, Analytical chemistry, Neutron source, Neutron, Atomic physics, Activation method, Nuclear Experiment, Instrumentation, Neutron temperature
Abstract: The article summarizes series of experiments devoted to studies of (n, x n) cross-sections by the activation method and states numerical values of measured cross-sections. The activation samples are used to measure neutron flux produced during accelerator driven system studies. The threshold (n, x n) reactions are used but experimental cross-section data of such reactions are mostly not available for neutron energies above 30 MeV. We focused for this reason on activation materials (Al, Au, Bi, In Ta, and Y) commonly used for such purposes and we also measured other materials (Cu, Fe, I, Mg, Ni, and Zn). The cross-sections were studied using quasi mono-energetic neutron sources based on proton reactions in a 7 Li target in the energy range from 17 MeV up to 94 MeV. We observed a good agreement of the obtained data with the experimental data in the EXFOR database and also with the calculations performed using the code TALYS 1.4. Many of presented measurements represent the first ever measurement for a given reaction at a given neutron energy.
Published: 2013

38. HADES Collaboration

Author: J. Adamczewski-Musch, O. Arnold, C. Behnke, A. Belounnas, A. Belyaev, J.C. Berger-Chen, J. Biernat, A. Blanco, C. Blume, M. Böhmer, P. Bordalo, S. Chernenko, L. Chlad, C. Deveaux, J. Dreyer, A. Dybczak, E. Epple, L. Fabbietti, O. Fateev, P. Filip, P. Fonte, C. Franco, J. Friese, I. Fröhlich, T. Galatyuk, J.A. Garzón, R. Gernhäuser, M. Golubeva, F. Guber, M. Gumberidze, S. Harabasz, T. Heinz, T. Hennino, S. Hlavac, C. Höhne, R. Holzmann, A. Ierusalimov, A. Ivashkin, B. Kämpfer, T. Karavicheva, B. Kardan, I. Koenig, W. Koenig, B.W. Kolb, G. Korcyl, G. Kornakov, R. Kotte, W. Kühn, A. Kugler, T. Kunz, A. Kurepin, A. Kurilkin, P. Kurilkin, V. Ladygin, R. Lalik, K. Lapidus, A. Lebedev, L. Lopes, M. Lorenz, T. Mahmoud, L. Maier, A. Mangiarotti, J. Markert, S. Maurus, V. Metag, J. Michel, D.M. Mihaylov, S. Morozov, C. Müntz, R. Münzer, L. Naumann, K.N. Nowakowski, M. Palka, Y. Parpottas, V. Pechenov, O. Pechenova, O. Petukhov, J. Pietraszko, W. Przygoda, S. Ramos, B. Ramstein, A. Reshetin, P. Rodriguez-Ramos, P. Rosier, A. Rost, A. Sadovsky, P. Salabura, T. Scheib, H. Schuldes, E. Schwab, F. Scozzi, F. Seck, P. Sellheim, J. Siebenson, L. Silva, Yu.G. Sobolev, S. Spataro, H. Ströbele, J. Stroth, P. Strzempek, C. Sturm, O. Svoboda, P. Tlusty, M. Traxler, H. Tsertos, E. Usenko, V. Wagner, C. Wendisch, M.G. Wiebusch, J. Wirth, Y. Zanevsky, and P. Zumbruch
Subjects: Nuclear and High Energy Physics
Published: 2017

39. pK+Λ final state: Towards the extraction of the ppK− contribution

Author: J. Wüstenfeld, C. Sturm, B. Ramstein, T. Hennino, Alexander Belyaev, B. Kämpfer, Tetyana Galatyuk, L. Lopes, M. Gumberidze, P. Cabanelas, Joachim Stroth, P. Huck, H. Schuldes, P. Tlusty, Kirill Lapidus, J. Friese, A. Sadovsky, K. Teilab, P. K. Kurilkin, J. Siebenson, G. Kornakov, W. Koenig, Y. Parpottas, R. Holzmann, J. Markert, A.P. Ierusalimov, A. Dybczak, D. Belver, J. C. Berger-Chen, T. A. Vasiliev, V. P. Ladygin, Yu.V. Zanevsky, R. Lalik, S. Lang, D. González-Díaz, C. Höhne, A. Krása, Tatiana Karavicheva, C. Behnke, S. P. Chernenko, A. Lebedev, Volker Metag, S. Spataro, I. Fröhlich, I. Koenig, J. Michel, M. B. Golubeva, Andrey Reshetin, A. B. Kurepin, A. Rustamov, H. Ströbele, M. Traxler, Marek Palka, M. Lorenz, Piotr Salabura, L. Naumann, O. V. Fateev, R. H. Munzer, O. Svoboda, A. K. Kurilkin, V. Wagner, L. Maier, B. W. Kolb, S. Harabasz, O. Pechenova, Laura Fabbietti, Fedor Guber, P. Strzempek, K. Gill, H. Kuc, L. Rehnisch, Grzegorz Korcyl, H. Tsertos, Michael Weber, Witold Przygoda, G. Agakishiev, E. Epple, S. Yurevich, A. Tarantola, E. Krebs, M. Böhmer, A. Mangiarotti, Yu. G. Sobolev, C. Müntz, A. Kugler, M. Jurkovic, J. A. Garzón, J. Pietraszko, V. Pechenov, A. Blanco, P. Fonte, A. Ivashkin, R. Kotte, Christoph Blume, T. Scheib, C. Wendisch, Filip Krizek, and C. Dritsa
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Partial wave analysis, Hadron, Hyperon, Lambda baryon, 01 natural sciences, Resonance (particle physics), 0103 physical sciences, Bound state, 010306 general physics, Nucleon
Abstract: The reaction p ( @ 3.5 GeV ) + p → p + Λ + K + can be studied to search for the existence of kaonic bound states like p p K − leading to this final state. This effort has been motivated by the assumption that in p + p collisions the Λ ( 1405 ) resonance can act as a doorway to the formation of the kaonic bound states. The status of this analysis within the HADES Collaboration, with particular emphasis on the comparison to simulations, is shown in this work and the deviation method utilized by the DISTO Collaboration in a similar analysis is discussed. The outcome suggests the employment of a partial wave analysis do disentangle the different contributions to the measured p K + Λ final state.
Published: 2013

40. The CBM Collaboration

Author: A. Abuhoza, J. Adamczewski-Musch, M.M. Aggarwal, Z. Ahammed, F. Ahmad, N. Ahmad, S. Ahmad, A. Akindinov, P. Akishin, E. Akishina, T. Akishina, V. Akishina, M. Al-Turany, S. Amar-Youcef, M. Anđelić, C. Andrei, A. Andronic, Yu. Anisimov, H. Appelshäuser, A. Arend, D. Argintaru, T. Armbruster, E. Atkin, S. Avdeyev, M.D. Azmi, V. Baban, M. Bach, E. Badura, S. Baginyan, T. Balog, S. Bandyopadhyay, P. Banerjee, N. Baranova, D. Bartoş, S. Bashir, Z. Basrak, M. Baszczyk, O. Batenkov, V. Baublis, C. Baumann, K.-H. Becker, T. Bel, S. Belogurov, I. Berceanu, E. Berdermann, A. Berdnikov, Y. Berdnikov, R. Berendes, C. Bergmann, D. Bertini, C. Beşliu, O. Bezshyyko, P.P. Bhaduri, A. Bhasin, A.K. Bhati, B. Bhattacharjee, A. Bhattacharyya, T.K. Bhattacharyya, S. Biswas, D. Blau, C. Blume, Yu. Bocharov, S. Böttger, M. Borysova, B. Bozsogi, T. Breitner, U. Brüning, J. Brzychczyk, A. Bubak, A. Bychkov, Xu Cai, M. Cãlin, R. Čaplar, G. Caragheorgheopol, I. Carević, V. Cătănescu, A. Chakrabarti, S. Chatterji, Sanatan Chattopadhyay, Subhasis Chattopadhyay, Hongfang Chen, Jianping Cheng, V. Chepurnov, S. Chernenko, A. Chernogorov, M.I. Ciobanu, G. Claus, F. Constantin, V. Covlea, M. Csanád, N. DʼAscenzo, S. Das, K. Davkov, V. Davkov, J. de Cuveland, B. Debnath, Zhi Deng, H. Deppe, I. Deppner, O. Derenovskaya, M. Deveaux, K. Dey, M. Dey, P. Dillenseger, V. Dobyrn, D. Doering, M. Domachowski, A. Dorokhov, C.A. Dritsa, A.K. Dubey, S. Dubnichka, A. Dubnichkova, W. Dulinski, M. Dželalija, D. Emschermann, H. Engel, V. Eremin, T. Eşanu, J. Eschke, O. Fateev, P. Fischer, H. Flemming, U. Frankenfeld, V. Friese, I. Fröhlich, J. Frühauf, Á. Fülöp, J. Gajda, T. Galatyuk, A. Galkin, V. Galkin, G. Gangopadhyay, M.S. Ganti, C. García Chávez, I. Gašparić, J. Gebelein, P. Ghosh, S.K. Ghosh, M. Goffe, V. Golovatyuk, S. Golovnya, V. Golovtsov, M. Golubeva, D. Golubkov, S. Gorbunov, D. Gottschalk, P. Gryboś, A. Grzeszczuk, F. Guber, A. Gupta, Yu. Gusakov, A. Haldar, S. Haldar, M. Hartig, J. Hehner, K. Heidel, N. Heine, A. Herghelegiu, N. Herrmann, B. Heß, J.M. Heuser, A. Himmi, C. Höhne, R. Holzmann, Guangming Huang, J. Hutsch, D. Hutter, A. Ierusalimov, E.-M. Ilgenfritz, M. Irfan, Valery Ivanov, Victor Ivanov, Vladimir Ivanov, A. Ivashkin, K. Jaaskelainen, V. Jakovlev, T. Janson, A. Jipa, I. Kadenko, B. Kämpfer, S. Kalcher, V. Kalinin, K.-H. Kampert, Tae Im Kang, E. Kaptur, R. Karabowicz, O. Karavichev, T. Karavicheva, D. Karmanov, V. Karnaukhov, E. Karpechev, K. Kasiński, M. Kaur, A. Kazantsev, U. Kebschull, G. Kekelidze, M.M. Khan, S.A. Khan, A. Khanzadeev, F. Khasanov, V. Kirakosyan, M. Kirejczyk, M. Kiš, I. Kisel, P. Kisel, S. Kiselev, A. Kiss, T. Kiss, R. Kłeczek, Ch. Klein-Bösing, V. Kleipa, K. Koch, L. Kochenda, P. Koczoń, B. Kolb, B. Komkov, J.M. Kopfer, M. Korolev, I. Korolko, R. Kotte, A. Kotynia, A. Kovalchuk, S. Kowalski, M. Koziel, G. Kozlov, P. Kravtsov, C. Kreidl, D. Kresan, M. Kretz, M. Krieger, E. Kryshen, W. Kucewicz, L. Kudin, A. Kugler, I. Kulakov, J. Kunkel, A. Kurepin, V. Kyva, V. Ladygin, C. Lara, P. Larionov, A. Laso Garcia, E. Lavrik, I. Lazanu, A. Lebedev, S. Lebedev, E. Lebedeva, J. Lehrbach, F. Lemke, Cheng Li, Jin Li, Li Qyian, Yuanjing Li, Yulan Li, V. Lindenstruth, S. Linev, E. Litvinenko, Feng Liu, I. Lobanov, E. Lobanova, S. Löchner, P.-A. Loizeau, A. Lymanets, A. Maevskaya, S. Mahajan, D.P. Mahapatra, T. Mahmoud, P. Maj, Z. Majka, A. Malakhov, O. Malyatina, H. Malygina, J. Manjavidze, V. Manko, S. Manz, V. Marin, T. Matulewicz, M. Merkin, V. Mialkovski, N. Miftakhov, K. Mikhailov, B. Milanovic, V. Militsija, F. Mir, W.F.J. Müller, C. Müntz, Yu. Murin, L. Naumann, T. Nayak, B. Neumann, W. Niebur, V. Nikulin, M. Nüssle, A. Oancea, Oh Kunsu, Y. Onishchuk, G. Ososkov, D. Ossetski, P. Otfinowski, E. Ovcharenko, Pal Susanta, I. Panasenko, S. Parzhitskiy, C. Pauly, Haiping Peng, I. Peric, D. Peshekhonov, V. Peshekhonov, V. Petráček, M. Petriş, A. Petrovici, M. Petrovici, A. Petrovskiy, O. Petukhov, K. Piasecki, J. Pietraszko, E. Plekhanov, V. Plujko, V. Poliakov, P. Polozov, A. Pop, V. Popov, V. Pospisil, B.V.K.S. Potukuchi, J. Pouryamout, A. Prakash, M. Prokudin, I. Pshenichnov, V. Pugatch, S. Querchfeld, S. Raha, W. Raja, F. Rami, R. Raniwala, S. Raniwala, A. Raportirenko, J. Rautenberg, R. Ray, S. Razin, P. Reichelt, S. Reinecke, A. Reshetin, C. Ristea, O. Ristea, E. Rostchin, I. Rostovtseva, A. Roy, J. Rożynek, Yu. Ryabov, V. Rykalin, A. Sadovsky, S. Sadovsky, P.K. Sahu, J. Saini, S.S. Sambyal, V. Samsonov, J. Sanchez Rosado, V. Saveliev, S. Schatral, C. Schiaua, C.J. Schmidt, H.R. Schmidt, C. Schrader, K. Schweda, A. Scurtu, S. Seddiki, A. Semennikov, A. Senger, P. Senger, A. Shabunov, Ming Shao, M.K. Sharma, V. Shumikhin, B. Sikora, A. Simakov, C. Simon, C. Simons, R.N. Singaraju, A.K. Singh, B.K. Singh, C.P. Singh, V. Singhal, M. Singla, K. Siwek-Wilczynska, L. Škoda, Song Jihye, I. Sorokin, D. Soyk, P. Staszel, A. Stavinskiy, E. Stephan, D. Storozhyk, M. Strikhanov, J. Stroth, C. Sturm, Yongjie Sun, O. Svoboda, R. Szczygieł, R. Talukdar, Zebo Tang, O. Tarassenkova, M. Târzilă, V. Tiflov, T. Tischler, P. Tlustý, T. Tolyhi, N. Topilʼskaya, C. Trageser, P. Trivedy, I. Tsakov, Yu. Tsyupa, F. Uhlig, E. Usenko, I. Valin, T. Vasiliev, I. Vassiliev, E. Verbitskaya, W. Verhoeven, A. Veshikov, Y. Viyogi, S. Volkov, Yu. Volkov, A. Vorobiev, A. Voronin, E. Vznuzdaev, M. Vznuzdaev, Dong Wang, Yaping Wang, Yi Wang, C. Wendisch, J.P. Wessels, J. Wiechula, B. Wiedemann, M. Winter, K. Wisniewski, D. Wohlfeld, Gy. Wolf, J. Wüstenfeld, Changzhou Xiang, Xu Nu, Jun-Gyu Yi, Yin Zhongbao, In-Kwon Yoo, Qian Yue, I. Yushmanov, Yu. Zaitsev, Yu. Zanevsky, M. Zhalov, Ya Peng Zhang, Yifei Zhang, Zhou Daicui, Xianglei Zhu, A. Zinchenko, W. Zipper, M. Żoładź, P. Zrelov, V. Zryuev, P. Zumbruch, and M. Zyzak
Subjects: Nuclear and High Energy Physics
Published: 2013

41. Λpinteraction studied via femtoscopy inp+Nbreactions atsNN=3.18GeV

Author: A. Sadovsky, A.P. Ierusalimov, V. Petousis, R. Holzmann, V. P. Ladygin, A. Rost, J. Markert, S. Ramos, G. Kornakov, V. Metag, S. P. Chernenko, Christoph Blume, A. Rustamov, M. Lorenz, J. Michel, W. Koenig, C. Höhne, T. Galatyuk, C. Franco, L. Maier, C. Deveaux, J. Wüstenfeld, O. Svoboda, J. Wirth, Marek Palka, J. Friese, Eliane Epple, T. Scheib, P. K. Kurilkin, S. Spataro, I. Fröhlich, O. V. Fateev, J. Siebenson, Tatiana Karavicheva, C. Behnke, C. Wendisch, L. Silva, S. Harabasz, E. Krebs, Laura Fabbietti, B. W. Kolb, A. Lebedev, E. T. Atomssa, K. Teilab, A. Kugler, M. Traxler, A. Dybczak, J. Stroth, J. C. Berger-Chen, Witold Przygoda, T. Mahmoud, S. Hlavac, F.F. Guber, T. Hennino, A. Krása, M. Böhmer, A. Blanco, P. Fonte, A. Mangiarotti, P. Sellheim, A. Ivashkin, R. Kotte, K. Schmidt-Sommerfeld, I. Koenig, J. A. Garzón, C. Sturm, M. Jurkovic, J. Adamczewski-Musch, K. Gill, G. Korcyl, H. Ströbele, H. Kuc, R. Lalik, A. Tarantola, L. Lopes, L. Naumann, H. Schuldes, T. A. Vasiliev, B. Kämpfer, P. Strzempek, V. Wagner, J. Biernat, B. Ramstein, M. Gumberidze, B. Kardan, G. Agakishiev, Yiannis Parpottas, S. Maurus, Alexey Kurepin, Oliver Werner Arnold, P. Zumbruch, P. Salabura, V. Pechenov, O. Pechenova, J. Pietraszko, H. Tsertos, Yu. G. Sobolev, P. Tlusty, Kirill Lapidus, C. Müntz, T. Kunz, L. Rehnisch, M.B. Golubeva, Yu.V. Zanevsky, Andrey Reshetin, R. H. Munzer, P. Bordalo, and A. K. Kurilkin
Subjects: Physics, Nuclear physics, 010308 nuclear & particles physics, 0103 physical sciences, 010306 general physics, 01 natural sciences
Published: 2016

42. Mecp2 regulates

Author: M, van der Vaart, O, Svoboda, B G, Weijts, R, Espín-Palazón, V, Sapp, T, Pietri, M, Bagnat, A R, Muotri, and D, Traver
Subjects: Inflammation, congenital, hereditary, and neonatal diseases and abnormalities, Methyl-CpG-Binding Protein 2, Neutrophils, Sequence Analysis, RNA, Tumor Necrosis Factor-alpha, Gene Expression Profiling, Embryonic Development, Gene Expression Regulation, Developmental, Zebra, nervous system diseases, Gastrointestinal Tract, Leukocyte Count, Phenotype, Rett syndrome, Larva, mental disorders, tnfa, Animals, mecp2, Inflammation Mediators, Zebrafish, Research Article
Abstract: Mutations in MECP2 cause Rett syndrome, a severe neurological disorder with autism-like features. Duplication of MECP2 also causes severe neuropathology. Both diseases display immunological abnormalities that suggest a role for MECP2 in controlling immune and inflammatory responses. Here, we used mecp2-null zebrafish to study the potential function of Mecp2 as an immunological regulator. Mecp2 deficiency resulted in an increase in neutrophil infiltration and upregulated expression of the pro- and anti-inflammatory cytokines Il1b and Il10 as a secondary response to disturbances in tissue homeostasis. By contrast, expression of the proinflammatory cytokine tumor necrosis factor alpha (Tnfa) was consistently downregulated in mecp2-null animals during development, representing the earliest developmental phenotype described for MECP2 deficiency to date. Expression of tnfa was unresponsive to inflammatory stimulation, and was partially restored by re-expression of functional mecp2. Thus, Mecp2 is required for tnfa expression during zebrafish development and inflammation. Finally, RNA sequencing of mecp2-null embryos revealed dysregulated processes predictive for Rett syndrome phenotypes., Summary: As shown by evaluating the levels of pro- and anti-inflammatory cytokines in mecp2-null zebrafish, Mecp2 is required for tnfa expression during zebrafish development and inflammation.
Published: 2016

43. Cross-section measurements of neutron threshold reactions in various materials

Author: A. Kugler, J. Vrzalova, O. Svoboda, Martin Suchopar, and V. Wagner
Subjects: Physics, Bonner sphere, Nuclear Theory, Neutron scattering, Physics and Astronomy(all), The Svedberg Laboratory, Neutron time-of-flight scattering, Nuclear physics, Neutron cross section, Neutron source, Neutron detection, Neutron, spallation reactions, activation detectors, cross-sections, Nuclear Experiment, background subtraction
Abstract: As members of international collaboration “Energy and Transmutation of radioactive Waste” we routinely use (n,xn) threshold reactions in various materials to measure high energy neutron flux from spallation reactions. The cross–sections of many reactions important for our activation detectors are missing. To improve situation, we studied the neutron cross-sections using different quasi-monoenergetic neutron sources based on proton reaction on 7Li target. The measurements were performed in Nuclear Physics Institute of the Academy of Sciences of the Czech Republic in Řež near Prague and in The Svedberg Laboratory in Uppsala (Sweden). We used neutron energies 17, 22, 30 and 35 MeV from the quasi-monoenergetic neutron source in Řež and neutron energies 22, 47 and 94 MeV in Uppsala. The last experiment was carried out in February 2010 in Uppsala using neutron energies 59, 66, 72 and 89 MeV. The study of neutron threshold reactions in yttrium was performed first time during this irradiation. We have developed procedure for the subtraction of contribution of the background neutrons. We studied various materials in the form of thin foils and observed good agreement with the data in EXFOR database and also with the calculations performed in deterministic code TALYS. Many cross-sections were measured in the energy regions where no experimental data are available so far.
Published: 2012
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44. Cross-Section Measurements of (n,xn) Threshold Reactions in Au, Bi, I, In and Ta

Author: A. Krása, J. Vrzalova, Mitja Majerle, V. Wagner, O. Svoboda, and A. Kugler
Subjects: Cross section (physics), Materials science, General Physics and Astronomy, Neutron source, Atomic physics
Published: 2011

45. Tests of the Electromagnetic Calorimeter for HADES Experiment at GSI

Author: T. Galatyuk, S. Morozov, M Golubeva, O. Petukhov, A. Ivashkin, F. Guber, A. Kugler, A. Rost, Andrey Reshetin, A. Shabanov, O. Svoboda, and P. Tlusty
Subjects: Nuclear physics, Physics, Excitation function, Electromagnetic calorimeter, Domain (ring theory), Mass spectrum, Virtual particle, Radiation, Nuclear matter, Energy (signal processing)
Abstract: Measurements of mass spectra of dilepton pairs in the HADES experiment in the energy domain of SIS18 and SIS100 (FAIR, Darmstadt, Germany) are very important for studing the excitation function of the virtual photon radiation from dense nuclear matter. A detail study of this phenomenon in the intermediate mass region (0.14 < M < 0.6 GeV/c2) demands precise measurements of inclusive cross sections of
Published: 2018

46. Neutron production in a Pb/U-setup irradiated with 0.7–2.5GeV protons and deuterons

Author: J. Adam, M.I. Krivopustov, F. Křížek, Mitja Majerle, V. Wagner, A. Kugler, O. Svoboda, and A. Krása
Subjects: Physics, Nuclear and High Energy Physics, Proton, Nuclear Theory, Monte Carlo method, Neutron multiplicity, Nuclear physics, Deuterium, Neutron cross section, Physics::Accelerator Physics, Neutron, Irradiation, Nuclear Experiment, Instrumentation
Abstract: A thick Pb-target with a U-blanket surrounded by a polyethylene moderator was irradiated with 0.7–2.5 GeV proton and deuteron beams. Neutron production was studied with activation detectors. Neutron multiplicity was determined using a modified form of the water-bath/activation-foil method. The experimental results were compared with Monte Carlo simulations performed with the MCNPX code (INCL4+ABLA). Neutron multiplicities on the Pb/U-setup were also compared with data measured on thick Pb-target irradiated with 0.1–4.5 GeV proton beams to date.
Published: 2010

47. The possibility to use ‘energy plus transmutation’ set-up for neutron production and transport benchmark studies

Author: I.V. Zhuk, A. Kugler, V. M. Tsoupko-Sitnikov, A. Krása, O. Svoboda, F. Křížek, J. Adam, M.I. Krivopustov, W. Westmeier, V. Wagner, and Mitja Majerle
Subjects: Physics, Nuclear physics, Nuclear transmutation, Proton, Detector, Benchmark (computing), Physics::Accelerator Physics, General Physics and Astronomy, Experimental data, Neutron, Blanket, Natural uranium, Nuclear Experiment
Abstract: The set-up ‘energy plus transmutation’, consisting of a thick lead target and a natural uranium blanket, was irradiated by relativistic proton beams with the energy from 0.7 GeV up to 2 GeV. Neutron field was measured in different places of this set-up using different activation detectors. The possibilities of using the obtained data for benchmark studies are analyzed in this paper. Uncertainties of experimental data are shown and discussed. The experimental data are compared with results of simulation with MCNPX code.
Published: 2007

48. Preparedness of critical infrastructure subjects in energy sector for crisis situations

Author: H Malachova, O Svoboda, J Urbanek, and A Oulehlova
Subjects: Finance, Economic growth, business.industry, Preparedness, business, Energy sector, Critical infrastructure
Published: 2015

49. K*(892)+production in proton-proton collisions atEbeam=3.5GeV

Author: Filip Krizek, V. Metag, M. Lorenz, F.F. Guber, P. Tlusty, R. Holzmann, J. Markert, Kirill Lapidus, M. Böhmer, A. Mangiarotti, P. Cabanelas, B. W. Kolb, T. Hennino, J. L. Boyard, A. Lebedev, V. Pechenov, O. Svoboda, A. M. Schmah, S. P. Chernenko, J. Michel, Kathrin Göbel, J. Siebenson, E. Schwab, J. Friese, J. Wüstenfeld, Roman Gernhäuser, G. Kornakov, A. Sadovsky, A. Blanco, T. A. Vasiliev, M. Traxler, A. Kugler, P. Fonte, A. Ivashkin, A.P. Ierusalimov, H. Tsertos, R. Kotte, T. Kunz, A. Dybczak, V. P. Ladygin, B. Kämpfer, Oliver Werner Arnold, J. C. Berger-Chen, W. Kühn, H. Kuc, O. Pechenova, L. Naumann, M.B. Golubeva, H. Ströbele, M. Weber, O. V. Fateev, J. A. Garzón, A. Krása, A. Rustamov, Andrey Reshetin, C. Wendisch, Yu.V. Zanevsky, M. Gumberidze, M. Jurkovic, D. Belver, J. Pietraszko, V. Wagner, R. H. Munzer, D. M. Mihaylov, I. Koenig, S. Yurevich, Yiannis Parpottas, Yu. G. Sobolev, Alexey Kurepin, D. González-Díaz, L. Maier, C. Müntz, W. Koenig, C. Sturm, Witold Przygoda, T. Heinz, A. Tarantola, S. Spataro, I. Fröhlich, J. Stroth, G. Korcyl, R. Lalik, L. Lopes, R. Krücken, G. Agakishiev, Paolo Finocchiaro, Tatiana Karavicheva, P. Salabura, Laura Fabbietti, B. Spruck, I. Iori, Tetyana Galatyuk, Eliane Epple, Alexander Belyaev, Marek Palka, K. Teilab, Yvonne Chiara Pachmayer, and B. Ramstein
Subjects: Physics, Excitation function, Nuclear and High Energy Physics, Proton, 010308 nuclear & particles physics, Nuclear Theory, Hyperon, 7. Clean energy, 01 natural sciences, Resonance (particle physics), Spectral line, Nuclear physics, Cross section (physics), Excited state, 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Spin-½
Abstract: We present results on the K∗(892)+ production in proton-proton collisions at a beam energy of E=3.5 GeV, which is hitherto the lowest energy at which this mesonic resonance has been observed in nucleon-nucleon reactions. The data are interpreted within a two-channel model that includes the three-body production of K∗(892)+ associated with the Λ or Σ hyperon. The relative contributions of both channels are estimated. Besides the total cross section σ(p+p→K∗(892)++X)=9.5±0.9-0.9+1.1±0.7μb, which adds a new data point to the excitation function of the K∗(892)+ production in the region of low excess energy, transverse momenta and angular spectra are extracted and compared with the predictions of the two-channel model. The spin characteristics of K∗(892)+ are discussed as well in terms of the spin-alignment.
Published: 2015

50. Nuclear data for advanced nuclear systems

Author: J. Vrzalova, V. Wagner, Martin Suchopar, Sergey I. Tyutyunnikov, A.A. Baldin, E. Strugalska-Gola, M. Szuta, Petr Chudoba, W.I. Furman, Stanislaw Kilim, Lukas Zavorka, Pavel Tichy, O. Svoboda, Yurii Vasiljevich Kish, M. Bielewicz, J. Adam, Mihail Kadykov, A. A. Solnyshkin, and A. Kugler
Subjects: Physics, Nuclear engineering, Nuclear data
Published: 2015

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