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21 results on '"Djeridi, R."'

1. Probing of in-medium hadron structure with HADES

Author

Krücken, R., Salabura, P., Agakichiev, G., Agodi, C., Alvarez-Poll, H., Bałanda, A., Bellia, G., Bielčík, Jaroslav, Böhmer, M., Boyard, J., Braun-Munzinger, P., Chernenko, S., Christ, T., Coniglione, R., Djeridi, R., Dohrmann, F., Duran, I., Eberl, T., Fabbietti, L., Fateev, O., Finocchiaro, P., Friese, J., Fröhlich, I., Garzon, J., Gernhäuser, R., Golubeva, M., Gonzalez-Diaz, D., Grosse, E., Guber, F., Hennino, T., Hlavac, S., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kotte, R., Kotulic-Bunta, J., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Lang, S., Lehnert, J., Maiolino, C., Markert, J., Metag, V., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, J., Novotny, R., Otwinowski, J., Pachmayer, Y. C., Pechenov, V., Perez, T., Pietraszko, J., Pleskac, R., Pospisil, V., Pvrzygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Roy-Stephan, M., Rustamov, A., Sadovsky, A., Sailer, B., Sanchez, M., Sapienza, P., Schmah, A., Smolyankin, V., Smykov, L., Spataro, S., Spruck, B., Stroebele, H., Stroth, J., Sturm, C., Sudol, M., Tlusty, P., Toia, A., Traxler, M., Tsertos, Haralambos, Wagner, V., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Y., Žovinec, D., Zumbruch, P., 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 Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
HEAVY-ION COLLISIONS, RELATIVISTIC TRANSPORT APPROACH, LOW-MASS DILEPTONS, RHO-MESON MASS, NUCLEAR-MATTER, SPECTRAL-FUNCTION, RING RECOGNITION, AU COLLISIONS, ENERGIES, SPECTROMETER, Nuclear and High Energy Physics, Particle physics, Nuclear Theory, Hadron, 01 natural sciences, Nuclear physics, Pion, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment, 010306 general physics, Physics, Spectrometer, 010308 nuclear & particles physics, Nuclear matter, High Energy Physics::Experiment, Heavy ion, Spectral function
Abstract

The High Acceptance DiElectron Spectrometer (HADES) has been recently commissioned at GSI Darmstadt. It has been designed to study hadron properties inside nuclear matter via measurements of dielectron decays in proton, pion and heavy ion induced reactions in 1 - 2 AGeV energy range. We report first preliminary results on invariant masses of e+ e- pairs measured in 12C + 12C collisions at E = 2 AGeV and compare them to simulations based on UrQMD transport model. In summary we present and discuss planned experiments. © 2004 Elsevier B.V. All rights reserved. 749 1-4 SUPPL. 150c 159c Cited By :26

Published
2005

2. We are Designers Because We Can Abstract

Author

Adel, A., Djeridi, R., Rajkumar Roy, and Essam Shehab

Subjects
Synthesis, Concept, Abstraction, System architecture, Model
Abstract

Organised by: Cranfield University Due to the increasing systems complexity, architecture design became an important issue. It gained interest and its importance was framed in three domains: as a way to understand complex systems, to design them, to manage their manufacturing process and to provide long-term rationality. The purpose of this paper is, firstly, to survey the existing definition approaches on architecture. Secondly, we propose a model for architecture design which articulates the potential linkage between two principle concepts: synthesis and abstraction. Our proposal model focuses on abstraction concept and permits an effective top-down design approach. It helps also designers to more respond to issues that characterize architecture design. Mori Seiki – The Machine Tool Company

Published
2009

3. Hades experiment: Di-lepton spectroscopy in p + p (2.2 GeV) and C+C (1 and 2 A GeV) collisions

Author

Krücken, R., Przygoda, W., Agakishiev, G., Agodi, C., Alvarez-Poll, H., Bałanda, A., Bassini, R., bellia, G., Belver, D., Bielčík, Jaroslav, Blanco, A., Böhmer, M., Boiano, C., Bortolotti, A., Boyard, J., Brambilla, S., Braun-Munzinger, P., Cabanelas, Pablo, Chernenko, S., Christ, T., Coniglione, R., Dahlinger, M., Diáz, J., Djeridi, R., Dohrmann, F., Durán, I., Eberl, T., Enghardt, W., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Garzón, J., Gernhäuser, R., Golubeva, M., González-Díaz, D., Grosse, E., Guber, F., Heinz, T., Hennino, T., Hlavac, S., Hoffmann, J., Holzmann, R., Ierusalimov, A., IoRi, I., Ivashkin, A., Jaskula, M., Jurkovic, M., Kajetanowicz, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Kirschner, D., König, I., König, W., Kolb, B., Kopf, U., Kotte, R., Kotulic-Bunta, J., Kugler, A., Kühn, W., Kulessa, R., Lang, S., Lehnert, J., Maier, L., Maier-Komor, P., Maiolino, C., Marín, J., Markert, J., Metag, V., Montes, N., Moriniere, E., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, R., Novotny, J., Ott, W., Otwinowski, J., Pachmayer, Y. C., Pérez, T., Pechenov, V., Pietraszko, J., Pinhao, J., Pleskac, R., Pospísil, V., Pullia, A., Rabin, N., Ramstein, B., Riboldi, S., Ritman, J., Rosier, P., Roy-Stephan, M., Rustamov, A., Sadovsky, A., Sailer, B., Salabura, P., Sapienza, P., Schmah, A., Schön, W., Schroeder, C., Schwab, E., Senger, P., Simon, R., Smolyankin, V., Smykov, L., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Sudol, M., Tiflov, V., Tlusty, P., Toia, A., Traxler, M., Tsertos, Haralambos, Turzo, I., Wagner, V., Walus, W., Willmott, C., Winkler, S., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Y., Zumbruch, P., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Plasma collision processes, Nuclear radiation spectroscopy, Pion, Magnetic field effects, Hadron properties, High Energy Physics::Experiment, Particle detectors, Vectors, Protons, Nuclear Experiment, Hades experiment, Heavy ions
Abstract

The HADES (High Acceptance Di-Electron Spectrometer) is a tool designed for lepton pair (e+e-) spectroscopy in pion, proton and heavy ion induced reactions in the 1-2 A GeV energy range. One of the goals of the HADES experiment is to study in-medium modifications of hadron properties like effective masses, decay widths, electromagnetic form factors etc. Such effects can be probed with vector mesons (ρ, ω, Φ) decaying into e +e- channel. The identification of vector mesons by means of a HADES spectrometer is based on invariant mass reconstruction of e +e- pairs. The combined information from all spectrometer sub-detectors is used to reconstruct the di-lepton signal. The recent results from 2.2 GeV p + p, 1 A GeV and 2 A GeV C+C experiments are presented. 37 139 151 Sponsors: National Atomic Energy Agency Conference code: 67031

Published
2006

4. Di-electron measurements in C+C reactions at 2 GeV·A with HADES

Author

Krücken, R., Eberl, T., Agakishiev, G., Agodi, C., Alvarez-Poll, H., Bałanda, A., Bellia, G., Bielčík, Jaroslav, Böhmer, M., Boyard, J. L., Braun-Munzinger, P., Chcmpnko, S., Christ, T., Coniglione, R., Djeridi, R., Dohrmann, F., Durán, I., Fabbiptti, L., Fateev, O., Finocchiaro, P., Friese, J., Fröhlich, L., Garzón, J. A., Gernhäuser, R., Golubeva, M., González-Díaz, D., Grossee, E., Guber, F., Hennino, T., Hlavac, S., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Kotte, R., Kotulic-Bunta, J., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Lang, S., Lehnert, J., Maiolino, C., Markert, J., Metag, V., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, R., Novotný, J., Otwinowski, J., Pachmayer, Y. C., Pant, L. M., Pechenov, V., Pérez, T., Pietraszko, J., Pleskač, R., Pospíšil, V., Przygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Rinnan, J., Roy-Stpphan, M., Rustamov, A., Sadovsky, A., Sailer, B., Salabura, P., Sánchez, M., Sapienza, P., Schmah, A., Simon, R., Smolyankin, V., Smykov, L., Spataro, S., Spruck, B., Stroebele, H., Stroth, J., Sturm, C., Sudol, M., Tlustý, P., Toia, A., Traxler, M., Tsertos, Haralambos, Wagner, V., Wiśniowski, M., Wójcik, T., Wüstenfold, J., Zanpvsky, Y., Žovinec, D., Zumbruch, P., and Tsertos, Haralambos [0000-0001-5966-343X]

Abstract

The High Acceptance DiElectron Spectrometer HADES has been recently commissioned at GSI, Darmstadt. It has been designed for systematic studies of hadron properties inside nuclear matter. We report first preliminary results on invariant masses e+e--pairs which were measured in 12C+12C collisions at Ekin = 2 GeV · A. The analysis methods are briefly outlined and a comparison with detailed Monte-Carlo simulations is shown. © 2005 Elsevier B.V. All rights reserved. 752 1-4 SPEC. ISS. 433c 438c

Published
2005

5. Dilepton analysis in the hades spectrometer for 12C+ 12C at 2 agev

Author

Krücken, R., Otwinowski, J., Agakichiev, G., Agodi, C., Alvarez-Poll, H., Bałanda, A., Bellia, G., Bielčík, Jaroslav, Bömer, M., Bokemeyer, H., Boyard, J., Braun-Munzinger, P., Chernenko, S., Christ, T., Coniglione, R., Djeridi, R., Dohrmann, F., Durán, I., Eberl, T., Fabbietti, L., Fateev, O., Finocchiaro, P., Friese, J., Fröhlich, I., Garzón, J., Gernhäuser, R., Golubeva, M., Gonzalez, D., Grosse, E., Gruber, F., Hennino, T., Hlavac, S., Holzmann, R., Ierusalimov, A., Iori, I., Jaskuła, M., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kopf, U., Kotte, R., Kotulic-Bunta, J., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Lang, S., Lehnert, J., Maiolino, C., Market, J., Metag, V., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, J., Novotný, J., Pachmayer, Y. C., Pant, L. M., Pechenov, V., Pérez, T., Pietraszko, J., Pleskač, R., Pospíšil, V., Przygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Roy-Stephan, M., Rustamov, A., Sadovsky, A., Sailer, B., Salabura, P., Sánchez, M., Sapienza, P., Schmah, A., Simon, R., Smolyanikin, V., Smykov, L., Spataro, S., Stroebele, H., Stroth, J., Sturm, C., Sudol, M., Tlustý, P., Toia, A., Traxler, M., Tsertos, Haralambos, Wagner, V., Wiśniowski, M., Wójcik, T., Wüstenfeld, J., Zanevsky, Y., Žoviniec, D., Zumbruch, P., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Nuclear and High Energy Physics, Particle physics, Meson, radioisotope decay, lepton, Nuclear Theory, meson, Spectrometer, Nuclear physics, invariant mass, nuclear physics, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Invariant mass, Nuclear Experiment, Physics, Signal reconstruction, Background reconstruction, article, Astronomy and Astrophysics, dilepton spectroscopy, spectrometer, Atomic and Molecular Physics, and Optics, molecular interaction, High Energy Physics::Experiment, hadron, combinatorial chemistry, Dileptons
Abstract

The identification of the light mesons in the HADES spectrometer is based on an invariant mass reconstruction of their decay into e+e- pairs. In the dilepton (e+e-) signal reconstruction, particularly important is the reduction of a huge combinatorial background arising from wrong combinations of e+ and e- to unlike sign pairs. Methods of the dilepton signal and combinatorial background reconstruction in the HADES spectrometer will be presented.

Published
2005

6. Dilepton analysis in the HADES spectrometer for C+C at 2 A GeV

Author

Krücken, R., Bielčík, Jaroslav, Agakishiev, G., Agodi, C., Alvarez-Poll, H., Bałanda, A., Bellia, G., Böhmer, M., Boyard, J. L., Braun-Munzinger, P., Chernenko, S., Christ, T., Coniglione, R., Djeridi, R., Dohrmann, F., Durán, I., Eberl, T., Fabbietti, L., Fateev, O., Finocchiaro, P., Friese, J., Fröhlich, I., Garzón, J. A., Gernhäuser, R., Golubeva, M., González-Daz, D., Grosse, E., Guber, F., Hennino, T., Hlavac, S., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Kottel, R., Kotulic-Bunta, J., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Lang, S., Lehnert, J., Maiolino, C., Markert, J., Metag, V., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, R., Novotny, J., Otwinowski, J., Pachmayer, Y. C., Pant, L. M., Pechenov, V., Pérez, T., Pietraszko, J., Pleskac, R., Pospísil, V., Przygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Roy-Stephan, M., Rustamov, A., Sadovsky, A., Sailer, B., Salabura, P., Sánchez, M., Sapienza, P., Schmah, A., Simon, R., Smolyankin, V., Smykov, L., Spataro, S., Spruck, B., Stroebele, H., Stroth, J., Sturm, C., Sudol, M., Tlusty, P., Toia, A., Traxler, M., Tsertos, Haralambos, Wagner, V., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Y., Zovinec, D., Zumbruch, P., Tsertos, Haralambos [0000-0001-5966-343X], 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), and HADES

Subjects
Nuclear and High Energy Physics, Particle physics, Meson, Physics::Instrumentation and Detectors, Nuclear Theory, 01 natural sciences, 7. Clean energy, Spectral line, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Nuclear Experiment, Positron annihilation, Physics, RING RECOGNITION, Spectrometer, 010308 nuclear & particles physics, Signal reconstruction, Detector, High Energy Physics::Phenomenology, HADRON PROPERTIES, MATTER, High Energy Physics::Experiment, Lepton
Abstract

The high-acceptance dielectron spectrometer (HADES) has become operational at GSI Darmstadt. The primary physics programme is to study in-medium changes of light vector mesons via their e+e- decays. The methods of dilepton signal reconstruction in the HADES spectrometer and preliminary dilepton spectra for C+C reactions at 2 A GeV are presented. In the signal reconstruction, particularly important is the reduction of the huge combinatorial background arising from e+e- combinations of leptons from gamma conversion in materials with other leptons in the collision. The purity of the dilepton signal is determined by using GEANT simulations with the full HADES geometry and a realistic detector response. © 2005 IOP Publishing Ltd. 31 4 S231 S237

Published
2005

7. Charged hadrons and leptons identification at HADES

Author

Kugler, A., Agakishiev, H., Agodi, C., Alvarez-Pol, H., Balanda, A., Bellia, G., Bielcik, J., Bohmer, J., Braun-Munzinger, P., Chernenko, S., Christ, T., Coniglione, R., Djeridi, R., Dohrmann, F., Duran, I., Eberl, T., Fabbietti, L., Fateev, O., Finocchiaro, P., Friese, J., Frohlich, I., Garzon, J., Gernhauser, R., Golubeva, M., Gonzales-Dias, D., Grosse, E., Guber, F., Hennino, T., Hlavac, S., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkovic, M., Kampfer, B., Kanaki, K., Koenig, I., Koenig, W., Kolb, B., Kotte, R., Kotulic-Bunta, J., Krucken, R., Kuhn, W., Kulessa, R., Kurepin, A., Lang, S., Lehnert, J., Maiolino, C., Markert, J., Metag, V., Mousa, J., Munch, M., Muntz, C., Naumann, L., Novotny, R., Novotny, J., Otwinowski, J., Pachmayer, Y., Pechenov, V., Perez, T., Pietraszko, J., Pleskac, R., Pospisil, V., Przygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Roy-Stephan, M., Rustamov, A., Sadovski, A., Sailer, B., Salabura, P., Sanchez, M., Sapienza, P., Schmah, A., Simon, R., Smoliankin, V., Smykov, L., Spataro, S., Spruck, B., Strobele, H., Stroth, J., Sturm, C., Tlusty, P., Toia, A., Traxler, M., Tsertos, H., Wagner, V., Wisniowski, M., Wojcik, T., Wustenfeld, J., Zanevsky, Y., Zovinec, D., and Zumbruch, P.

Subjects
Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment
Abstract

The HADES spectrometer installed at GSI Darmstadt is devoted to the study of the production of di-lepton pairs from vector meson decays in relativistic nucleus-nucleus collisions, as well as proton- and pion-induced reactions. Extraction of rare lepton pairs in high hadron multiplicity events requires an efficient particle identification (PID). In HADES charged particles momentum is measured by a tracking system surrounding the toroidal super conducting magnet, and velocity and energy loss is provided by a TOF detector. Leptons are identified by a Rich as well as a Shower detector. The particle identification method is using full experimental information from all subdetectors. To demonstrate the method performance, single particle spectra of charged hadrons and leptons from C+C at 2 AGeV will be presented and compared with results of corresponding simulations. The proton and pion yields an m_T and rapidity distributions will be compared with existing data. Very preliminary results of lepton analysis will be shown as well.

Published
2004

8. Charged hadrons and leptons identification at HADES

Author

Krücken, R., Kugler, A., Agakishiev, H., Agodi, C., Alvarez-Poll, H., Bałanda, A., Bellia, G., Bielčík, Jaroslav, Böhmer, M., Boyard, J., Braun-Munzinger, P., Chernenko, S., Christ, T., Coniglione, R., Djeridi, R., Dohrmann, F., Duran, I., Eberl, T., Fabbietti, L., Fateev, O., Finocchiaro, P., Friese, J., Fröhlich, I., Garzon, J., Gernhäuser, R., Golubeva, M., Gonzales-Dias, D., Grosse, E., Guber, F., Hennino, T., Hlaváč, S., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkovi, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kotte, R., Kotulič-Bunta, J., Kühn, W., Kulessa, R., Kurepin, A., Lang, S., Lehnert, J., Maiolino, C., Markert, J., Metag, V., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, R., Novotný, J., Otwinowski, J., Pachmayer, Y. C., Pechenov, V., Perez, T., Pietraszko, J., Pleskač, R., Pospísil, V., Przygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Roy-Stephan, M., Rustamov, A., Sadovski, A., Sailer, B., Salabura, P., Sanchez, M., Sapienza, P., Schmah, A., Simon, R., Smoliankin, V., Smykov, L., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Sudol, M., Tlustý, P., Toia, A., Traxler, M., Tsertos, Haralambos, Wagner, V., Wiśniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Yu, Žovinec, D., Zumbruch, P., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment
Abstract

The HADES spectrometer installed at GSI Darmstadt is devoted to the study of the production of di-lepton pairs from vector meson decays in relativistic nucleus-nucleus collisions, as well as proton- and pion-induced reactions. Extraction of rare lepton pairs in high hadron multiplicity events requires an efčient particle identičation (PID). In HADES charged particles momentum is measured by a tracking system surrounding the toroidal super conducting magnet, and velocity and energy loss is provided by a TOF detector. Leptons are identièd by a Rich as well as a Shower detector. The particle identičation method is using full experimental information from all subdetectors. To demonstrate the method performance, single particle spectra of charged hadrons and leptons from C+C at 2A GeV will be presented and compared with results of corresponding simulations. The proton and pion yields an mT and rapidity distributions will be compared with existing data. Very preliminary results of lepton analysis will be shown as well. © Institute of Physics, SAS, Bratislava, Slovakia. 54 4 375 384

Published
2004

9. Study of e+, e- production in elementary and nuclear collisions near the production threshold with HADES

Author

Krücken, R., Salabura, P., Agodi, C., Alvarez-Poll, H., Bałanda, A., Bellia, G., Belver, D., Bielčík, Jaroslav, Böhmer, M., Bokemeyer, H., Boyard, J., Braun-Munzinger, P., Chepurnov, V., Chernenko, S., Christ, T., Coniglione, R., Diáz, J., Djeridi, R., Dohrmann, F., Duran, I., Eberl, T., Emeljanov, V., Fabbietti, L., Fateev, O., Fernandez, C., Finocchiaro, P., Friese, J., Fröhlich, I., Fuentes, B., Garzon, J., Gernhäuser, R., Golubeva, M., Gonzalez, D., Grosse, E., Guber, F., Hennino, T., Hlavac, S., Hoffmann, J., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kotte, R., Kotulic-Bunta, J., Kugler, A., Kuhn, W., Kulessa, R., Kurepin, A., Kurtukian-Nieto, T., Lang, S., Lehnert, J., Maiolino, C., Marn, J., Markert, J., Metag, V., Montes, N., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, J., Otwinowski, J., Pachmayer, Y. C., Panebratsev, Y., Pechenov, V., Perez, T., Pietraszko, J., Pleskac, R., Pospisil, V., Przygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Rodriguez-Prieto, G., Roy-Stephan, M., Rustamov, A., Sabin-Fernandez, J., Sadovsky, A., Sailer, B., Sanchez, M., Smolyankin, V., Smykov, L., Spataro, S., Spruck, B., Stroebele, H., Stroth, J., Sturm, C., Sudol, M., Titov, A., Tlusty, P., Toia, A., Traxler, M., Tsertos, Haralambos, Vazquez, A., Volkov, Y., Wagner, V., Walus, W., Winkler, S., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Y., Zumbruch, P., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Nuclear and High Energy Physics, Particle physics, Spectral representation, Meson production, Proton, Meson, ENERGIES, High resolution electron microscopy, Dielectron production, Spectrum analyzers, HEAVY-ION COLLISIONS, Spectroscopic analysis, Resonance, DECAYS, Heavy ions, Nuclear physics, Pion, Electromagnetism, Baryonic resonances, SPECTROMETER, DILEPTON PRODUCTION, RING RECOGNITION, VECTOR-MESONS, Meson reconstruction, Nuclear Experiment, Physics, Mathematical models, Elementary particles, Vector meson dominance, Vectors, Vector dominance models (VDM), High Energy Physics::Experiment, Heavy ion
Abstract

HADES is a second generation experiment designed to study dielectron production in proton, pion, and heavy ion induced reactions at the GSI accelerator facility in Darmstadt. The physics programme of HADES is focused on in-medium properties of the light vector mesons. In this contribution we present status of the HADES experiment, demonstrate its capability to identify rare dielectron signal, show first experimental results obtained from C+C reactions at 2 A GeV and shortly discuss physics programme of up-coming experimental runs. © 2004 Elsevier B.V. All rights reserved. 53 1 49 58 Cited By :12

Published
2004

10. HADES Experiment: Di-Lepton Spectroscopy in p+p (2.2 GeV) and C+C (1 and 2 A GeV) Collisions

Author

Przygoda, W., Agakishiev, G., Agodi, C., Alvarez-Pol, H., Balanda, A., Bassini, R., Bellia, G., Belver, D., Bielcik, J., Blanco, A., Boehmer, M., Boiano, C., Bortolotti, A., Boyard, J., Brambilla, S., Braun-Munzinger, P., Cabanelas, P., Chernenko, S., Christ, T., Coniglione, R., Dahlinger, M., Diaz, J., Djeridi, R., Dohrmann, F., Duran, I., Eberl, T., Enghardt, W., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Froehlich, I., Garzon, J., Gernhaeuser, R., Golubeva, M., Gonzalez-Diaz, D., Grosse, E., Guber, F., Heinz, T., Hennino, T., Hlavac, S., Hoffmann, J., Holzmann, R., Ierusalimov, A., Iori, I., Ivashkin, A., Jaskula, M., Jurkovic, M., Kajetanowicz, M., Kaempfer, B., Kanaki, K., Karavicheva, T., Kirschner, D., Koenig, I., Koenig, W., Kolb, B., Kopf, U., Kotte, R., Kotulic-Bunta, J., Kruecken, R., Kugler, A., Kuehn, W., Kulessa, R., Lang, S., Lehnert, J., Maier, L., Maier-Komor, P., Maiolino, C., Marin, J., Markert, J., Metag, V., Montes, N., Moriniere, E., Mousa, J., Muench, M., Muentz, C., Naumann, L., Novotny, R., Novotny, J., Ott, W., Otwinowski, J., Pachmayer, Y., Perez, T., Pechenov, V., Pietraszko, J., Pinhao, J., Pleskac, R., Pospisil, V., Pullia, A., Rabin, N., Ramstein, B., Riboldi, S., Ritman, J., Rosier, P., Roy-Stephan, M., Rustamov, A., Sadovsky, A., Sailer, B., Salabura, P., Sapienza, P., Schmah, A., Schoen, W., Schroeder, C., Schwab, E., Senger, P., Simon, R., Smolyankin, V., Smykov, L., Spataro, S., Spruck, B., Stroebele, H., Stroth, J., Sturm, C., Sudol, M., Tiflov, V., Tlusty, P., Toia, A., Traxler, M., Tsertos, H., Turzo, I., Wagner, V., Walus, W., Willmott, C., Winkler, S., Wisniowski, M., Wojcik, T., Wuestenfeld, J., Zanevsky, Y., Zumbruch, P., Przygoda, W., Agakishiev, G., Agodi, C., Alvarez-Pol, H., Balanda, A., Bassini, R., Bellia, G., Belver, D., Bielcik, J., Blanco, A., Boehmer, M., Boiano, C., Bortolotti, A., Boyard, J., Brambilla, S., Braun-Munzinger, P., Cabanelas, P., Chernenko, S., Christ, T., Coniglione, R., Dahlinger, M., Diaz, J., Djeridi, R., Dohrmann, F., Duran, I., Eberl, T., Enghardt, W., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Froehlich, I., Garzon, J., Gernhaeuser, R., Golubeva, M., Gonzalez-Diaz, D., Grosse, E., Guber, F., Heinz, T., Hennino, T., Hlavac, S., Hoffmann, J., Holzmann, R., Ierusalimov, A., Iori, I., Ivashkin, A., Jaskula, M., Jurkovic, M., Kajetanowicz, M., Kaempfer, B., Kanaki, K., Karavicheva, T., Kirschner, D., Koenig, I., Koenig, W., Kolb, B., Kopf, U., Kotte, R., Kotulic-Bunta, J., Kruecken, R., Kugler, A., Kuehn, W., Kulessa, R., Lang, S., Lehnert, J., Maier, L., Maier-Komor, P., Maiolino, C., Marin, J., Markert, J., Metag, V., Montes, N., Moriniere, E., Mousa, J., Muench, M., Muentz, C., Naumann, L., Novotny, R., Novotny, J., Ott, W., Otwinowski, J., Pachmayer, Y., Perez, T., Pechenov, V., Pietraszko, J., Pinhao, J., Pleskac, R., Pospisil, V., Pullia, A., Rabin, N., Ramstein, B., Riboldi, S., Ritman, J., Rosier, P., Roy-Stephan, M., Rustamov, A., Sadovsky, A., Sailer, B., Salabura, P., Sapienza, P., Schmah, A., Schoen, W., Schroeder, C., Schwab, E., Senger, P., Simon, R., Smolyankin, V., Smykov, L., Spataro, S., Spruck, B., Stroebele, H., Stroth, J., Sturm, C., Sudol, M., Tiflov, V., Tlusty, P., Toia, A., Traxler, M., Tsertos, H., Turzo, I., Wagner, V., Walus, W., Willmott, C., Winkler, S., Wisniowski, M., Wojcik, T., Wuestenfeld, J., Zanevsky, Y., and Zumbruch, P.

Abstract

The HADES (High Acceptance Di-Electron Spectrometer) is a tool designed for lepton pair (e+e-) spectroscopy in pion, proton and heavy ion induced reactions in the 1-2 A GeV energy range. One of the goals of the HADES experiment is to study in-medium modifications of hadron properties like effective masses, decay widths, electromagnetic form factors etc. Such effects can be probed with vector mesons (rho , omega , phi ) decaying into e+e- channel. The identification of vector mesons by means of a HADES spectrometer is based on invariant mass reconstruction of e+e- pairs. The combined information from all spectrometer sub-detectors is used to reconstruct the di-lepton signal. The recent results from 2.2 GeV p+p, 1 A GeV and 2 A GeV C+C experiments are presented.

Published
2006

11. Dilepton analysis in the HADES spectrometer for 12C + 12C at 2 AGeV

Author

Otwinowski, J., Agakichiev, G., Agodi, C., Alvarez-Pol, H., Balanda, A., Bellia, G., Belver, D., Bielcik, J., Böhmer, M., Bokemeyer, H., Boyard, J., Braun-Munzinger, P., Chepurnov, V., Chernenko, S., Christ, T., Coniglione, R., Daues, H., Diaz, J., Djeridi, R., Dohrmann, F., Duran, I., Eberl, T., Emelianov, V., Fabbietti, L., Fateev, O., Fernandez, C., Finocchiaro, P., Friese, J., Fröhlich, I., Fuentes, B., Garzon, J., Gernhäuser, R., Golubeva, M., Gonzalez-Diaz, D., Grosse, E., Guber, F., Hehner, J., Heinz, T., Hennino, T., Hlavac, S., Hoffmann, J., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kopf, U., Kotte, R., Kotulic-Bunta, J., Krücken, R., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Kutukian-Nieto, T., Lang, S., Lehnert, J., Maiolino, C., Marin, J., Markert, J., Mishin, Y., Montes, N., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, J., Ott, W., Pachmayer, Y., Panebrasev, Y., Pechenov, V., Perez, T., Pietraszko, J., Pleskac, R., Pospisil, V., Pvrzygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Rodrigez Pieto, G., Roy-Stephan, M., Rustamov, A., Sabin, F. J., Sadovsky, A., Sailer, B., Salabura, P., Sanchez, M., Sapienza, P., Schmah, A., Schroeder, C., Schwab, E., Senger, P., Simon, R., Smolyankin, V., Smykov, L., Spataro, S., Stelzer, H., Stroebele, H., Stroth, J., Sturm, C., Sudol, M., Titov, A., Tlusty, P., Toia, A., Traxler, M., Tsertos, H., Vazquez, A., Volkov, Y., Wagner, V., Walus, W., Wang, Y., Winkler, S., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Y., Zovinec, D., Zumbruch, P., Otwinowski, J., Agakichiev, G., Agodi, C., Alvarez-Pol, H., Balanda, A., Bellia, G., Belver, D., Bielcik, J., Böhmer, M., Bokemeyer, H., Boyard, J., Braun-Munzinger, P., Chepurnov, V., Chernenko, S., Christ, T., Coniglione, R., Daues, H., Diaz, J., Djeridi, R., Dohrmann, F., Duran, I., Eberl, T., Emelianov, V., Fabbietti, L., Fateev, O., Fernandez, C., Finocchiaro, P., Friese, J., Fröhlich, I., Fuentes, B., Garzon, J., Gernhäuser, R., Golubeva, M., Gonzalez-Diaz, D., Grosse, E., Guber, F., Hehner, J., Heinz, T., Hennino, T., Hlavac, S., Hoffmann, J., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kopf, U., Kotte, R., Kotulic-Bunta, J., Krücken, R., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Kutukian-Nieto, T., Lang, S., Lehnert, J., Maiolino, C., Marin, J., Markert, J., Mishin, Y., Montes, N., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, J., Ott, W., Pachmayer, Y., Panebrasev, Y., Pechenov, V., Perez, T., Pietraszko, J., Pleskac, R., Pospisil, V., Pvrzygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Rodrigez Pieto, G., Roy-Stephan, M., Rustamov, A., Sabin, F. J., Sadovsky, A., Sailer, B., Salabura, P., Sanchez, M., Sapienza, P., Schmah, A., Schroeder, C., Schwab, E., Senger, P., Simon, R., Smolyankin, V., Smykov, L., Spataro, S., Stelzer, H., Stroebele, H., Stroth, J., Sturm, C., Sudol, M., Titov, A., Tlusty, P., Toia, A., Traxler, M., Tsertos, H., Vazquez, A., Volkov, Y., Wagner, V., Walus, W., Wang, Y., Winkler, S., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Y., Zovinec, D., and Zumbruch, P.

Abstract

The identification of light mesons in the HADES spectrometer is based on an invariant mass reconstruction of their decay into e+e- pairs. In the delepton (e+e) signal reconstruction particularly important is the reduction of a combinatorial background arising from wrong combinations of e+ and e- to unlike sign pairs. The purity of the dilepton signal is determined by using GEANT simulations. The analysis methods of the dilepton signal and combinatorial background reconstruction will be presented.

Published
2005

12. Probing of in-medium hadron structure with HADES

Author

Salabura, P., Agakichiev, G., Agodi, C., Alvarez-Pol, H., Balanda, A., Bellia, G., Bielcik, J., Böhmer, M., Boyard, J., Braun-Munzinger, P., Chernenko, S., Christ, T., Coniglione, R., Djeridi, R., Dohrmann, F., Duran, I., Eberl, T., Fabbietti, L., Fateev, O., Finocchiaro, P., Friese, J., Fröhlich, I., Garzon, J., Gernhäuser, R., Golubeva, M., Gonzalez-Diaz, D., Grosse, E., Guber, F., Hennino, T., Hlavac, S., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kotte, R., Kotulic-Bunta, J., Krücken, R., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Lang, S., Lehnert, J., Maiolino, C., Markert, J., Metag, V., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, J., Novotny, R., Otwinowski, J., Pachmayer, Y., Pechenov, V., Perez, T., Pietraszko, J., Pleskac, R., Pospisil, V., Pvrzygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Roy-Stephan, M., Rustamov, A., Sadovsky, A., Sailer, B., Sanchez, M., Sapienza, P., Schmah, A., Smolyankin, V., Smykov, L., Spataro, S., Spruck, B., Stroebele, H., Stroth, J., Sturm, C., Sudol, M., Tlusty, P., Toia, A., Traxler, M., Tsertos, H., Wagner, V., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Y., Zovinec, D., Zumbruch, P., Salabura, P., Agakichiev, G., Agodi, C., Alvarez-Pol, H., Balanda, A., Bellia, G., Bielcik, J., Böhmer, M., Boyard, J., Braun-Munzinger, P., Chernenko, S., Christ, T., Coniglione, R., Djeridi, R., Dohrmann, F., Duran, I., Eberl, T., Fabbietti, L., Fateev, O., Finocchiaro, P., Friese, J., Fröhlich, I., Garzon, J., Gernhäuser, R., Golubeva, M., Gonzalez-Diaz, D., Grosse, E., Guber, F., Hennino, T., Hlavac, S., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kotte, R., Kotulic-Bunta, J., Krücken, R., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Lang, S., Lehnert, J., Maiolino, C., Markert, J., Metag, V., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, J., Novotny, R., Otwinowski, J., Pachmayer, Y., Pechenov, V., Perez, T., Pietraszko, J., Pleskac, R., Pospisil, V., Pvrzygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Roy-Stephan, M., Rustamov, A., Sadovsky, A., Sailer, B., Sanchez, M., Sapienza, P., Schmah, A., Smolyankin, V., Smykov, L., Spataro, S., Spruck, B., Stroebele, H., Stroth, J., Sturm, C., Sudol, M., Tlusty, P., Toia, A., Traxler, M., Tsertos, H., Wagner, V., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Y., Zovinec, D., and Zumbruch, P.

Abstract

The High Acceptance DiElectron Spectrometer (HADES) has been recently commissioned at GSI Darmstadt. It has been designed to study hadron properties inside nuclear matter via measurements of dielectron decays in proton, pion and heavy ion induced reactions in 1−2 AGeV energy range. We report first preliminary results on invariant masses of e+e− pairs measured in 12C + 12C collisions at E=2 AGeV and compare them to simulations based on UrQMD transport model. In summary we present and discuss planned experiments.

Published
2005

13. Dilepton analysis in the HADES spectrometer for C+C at 2 A GeV

Author

Bielcik, J., Agakichiev, G., Agodi, C., Alvarez-Pol, H., Balanda, A., Bellia, G., Böhmer, M., Boyard, J., Braun-Munzinger, P., Chernenko, S., Christ, T., Coniglione, R., Djeridi, R., Dohrmann, F., Duran, I., Eberl, T., Fabbietti, L., Fateev, O., Finocchiaro, P., Friese, J., Fröhlich, I., Garzon, J., Gernhäuser, R., Golubeva, M., Gonzalez-Diaz, D., Grosse, E., Guber, F., Hennino, T., Hlavac, S., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kotte, R., Kotulic-Bunta, J., Krücken, R., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Lang, S., Lehnert, J., Maiolino, C., Markert, J., Metag, V., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, R., Novotny, J., Otwinowski, J., Pachmayer, Y., Pant, L. M., Pechenov, V., Perez, T., Pietraszko, J., Pleskac, R., Pospisil, V., Pvrzygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Roy-Stephan, M., Rustamov, A., Sadovsky, A., Sailer, B., Salabura, P., Sanchez, M., Sapienza, P., Schmah, A., Simon, R., Smolyankin, V., Smykov, L., Spataro, S., Spruck, B., Stroebele, H., Stroth, J., Sturm, C., Sudol, M., Tlusty, P., Toia, A., Traxler, M., Tsertos, H., Wagner, V., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Y., Zovinec, D., Zumbruch, P., Hades Collaboration, Bielcik, J., Agakichiev, G., Agodi, C., Alvarez-Pol, H., Balanda, A., Bellia, G., Böhmer, M., Boyard, J., Braun-Munzinger, P., Chernenko, S., Christ, T., Coniglione, R., Djeridi, R., Dohrmann, F., Duran, I., Eberl, T., Fabbietti, L., Fateev, O., Finocchiaro, P., Friese, J., Fröhlich, I., Garzon, J., Gernhäuser, R., Golubeva, M., Gonzalez-Diaz, D., Grosse, E., Guber, F., Hennino, T., Hlavac, S., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kotte, R., Kotulic-Bunta, J., Krücken, R., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Lang, S., Lehnert, J., Maiolino, C., Markert, J., Metag, V., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, R., Novotny, J., Otwinowski, J., Pachmayer, Y., Pant, L. M., Pechenov, V., Perez, T., Pietraszko, J., Pleskac, R., Pospisil, V., Pvrzygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Roy-Stephan, M., Rustamov, A., Sadovsky, A., Sailer, B., Salabura, P., Sanchez, M., Sapienza, P., Schmah, A., Simon, R., Smolyankin, V., Smykov, L., Spataro, S., Spruck, B., Stroebele, H., Stroth, J., Sturm, C., Sudol, M., Tlusty, P., Toia, A., Traxler, M., Tsertos, H., Wagner, V., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Y., Zovinec, D., Zumbruch, P., and Hades Collaboration

Abstract

The high-acceptance dielectron spectrometer (HADES) has become operational at GSI Darmstadt. The primary physics programme is to study in-medium changes of light vector mesons via their e+e- decays. The methods of dilepton signal reconstruction in the HADES spectrometer and preliminary dilepton spectra for C+C reactions at 2 A GeV are presented. In the signal reconstruction, particularly important is the reduction of the huge combinatorial background arising from e+e- combinations of leptons from gamma conversion in materials with other leptons in the collision. The purity of the dilepton signal is determined by using GEANT simulations with the full HADES geometry and a realistic detector response.

Published
2005

14. Di-electron measurements in C+C reactions at 2GeV*A with HADES

Author

Eberl, T., Agakichiev, G., Agodi, C., Alvarez-Pol, H., Balanda, A., Bellia, G., Bielcik, J., Böhmer, M., Boyard, J., Braun-Munzinger, P., Chernenko, S., Christ, T., Coniglione, R., Djeridi, R., Dohrmann, F., Duran, I., Fabbietti, L., Fateev, O., Finocchiaro, P., Friese, J., Fröhlich, I., Garzon, J., Gernhäuser, R., Golubeva, M., Gonzalez-Diaz, D., Grosse, E., Guber, F., Hennino, T., Hlavac, S., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kotte, R., Kotulic-Bunta, J., Krücken, R., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Lang, S., Lehnert, J., Maiolino, C., Markert, J., Metag, V., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, R., Novotny, J., Otwinowski, J., Ott, W., Pachmayer, Y., Pant, L. M., Pechenov, V., Perez, T., Pietraszko, J., Pleskac, R., Pospisil, V., Pvrzygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Roy-Stephan, M., Rustamov, A., Sadovsky, A., Sailer, B., Salabura, P., Sanchez, M., Sapienza, P., Schmah, A., Simon, R., Smolyankin, V., Smykov, L., Spataro, S., Spruck, B., Stroebele, H., Stroth, J., Sturm, C., Sudol, M., Tlusty, P., Toia, A., Traxler, M., Tsertos, H., Wagner, V., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Y., Zovinec, D., Zumbruch, P., Eberl, T., Agakichiev, G., Agodi, C., Alvarez-Pol, H., Balanda, A., Bellia, G., Bielcik, J., Böhmer, M., Boyard, J., Braun-Munzinger, P., Chernenko, S., Christ, T., Coniglione, R., Djeridi, R., Dohrmann, F., Duran, I., Fabbietti, L., Fateev, O., Finocchiaro, P., Friese, J., Fröhlich, I., Garzon, J., Gernhäuser, R., Golubeva, M., Gonzalez-Diaz, D., Grosse, E., Guber, F., Hennino, T., Hlavac, S., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kotte, R., Kotulic-Bunta, J., Krücken, R., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Lang, S., Lehnert, J., Maiolino, C., Markert, J., Metag, V., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, R., Novotny, J., Otwinowski, J., Ott, W., Pachmayer, Y., Pant, L. M., Pechenov, V., Perez, T., Pietraszko, J., Pleskac, R., Pospisil, V., Pvrzygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Roy-Stephan, M., Rustamov, A., Sadovsky, A., Sailer, B., Salabura, P., Sanchez, M., Sapienza, P., Schmah, A., Simon, R., Smolyankin, V., Smykov, L., Spataro, S., Spruck, B., Stroebele, H., Stroth, J., Sturm, C., Sudol, M., Tlusty, P., Toia, A., Traxler, M., Tsertos, H., Wagner, V., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Y., Zovinec, D., and Zumbruch, P.

Abstract

The High Acceptance DiElectron Spectrometer HADES has been recently commissioned at GSI, Darmstadt. It has been designed for systematic studies of hadron properties inside nuclear matter. We report first preliminary results on invariant masses of e+e--pairs which were measured in 12C + 12C collisions at Ekin=2 GeV*A. The analysis methods are briefly outlined and a comparison with detailed Monte-Carlo simulations is shown.

Published
2005

15. Hadron production in C+C at 2 A GeV measured by the HADES spectrometer

Author

Tlusty, P., Agakichiev, G., Agodi, C., Alvarez-Pol, H., Atkin, E., Balanda, A., Bellia, G., Belver, D., Bielcik, J., Böhmer, M., Bokemeyer, H., Boyard, J., Braun-Munzinger, P., Chepurnov, V., Chernenko, S., Christ, T., Coniglione, R., Daues, H., Diaz, J., Djeridi, R., Dohrmann, F., Duran, I., Eberl, T., Emeljanov, V., Fabbietti, L., Fateev, O., Fernandez, C., Finocchiaro, P., Friese, J., Fröhlich, I., Fuentes, B., Garzon, J., Gernhäuser, R., Golubeva, M., Gonzalez, D., Grosse, E., Guber, F., Hehner, J., Heinz, T., Hennino, T., Hlaváè, S., Hoffmann, J., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkoviè, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kopf, U., Kotte, R., Kotuliè-Bunta, J., Krücken, R., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Kurtukian-Nieto, T., Lang, S., Lehnert, J., Maiolino, C., Marín, J., Markert, J., Mishin, Y., Montes, N., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotný, J., Ott, W., Otwinowski, J., Pachmayer, Y., Panebratsev, Y., Pechenov, V., Perez, T., Pietraszko, J., Pleskaè, R., PospíšIl, V., Przygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Rodriguez Prieto, G., Roy-Stephan, M., Rustamov, A., Sabin Fernandez, J., Sadovsky, A., Sailer, B., Salabura, P., Sanchez, M., Sapienza, P., Schmah, A., Schroeder, C., Schwab, E., Senger, P., Simon, R., Smolyankin, V., Smykov, L., Spataro, S., Stelzer, H., Stroebele, H., Stroth, J., Sturm, C., Sudol, M., Titov, A., Toia, A., Traxler, M., Tsertos, H., Vazquez, A., Volkov, Y., Wagner, V., Walus, W., Wang, Y., Winkler, S., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Y., ŽOvinec, D., Zumbruch, P., Tlusty, P., Agakichiev, G., Agodi, C., Alvarez-Pol, H., Atkin, E., Balanda, A., Bellia, G., Belver, D., Bielcik, J., Böhmer, M., Bokemeyer, H., Boyard, J., Braun-Munzinger, P., Chepurnov, V., Chernenko, S., Christ, T., Coniglione, R., Daues, H., Diaz, J., Djeridi, R., Dohrmann, F., Duran, I., Eberl, T., Emeljanov, V., Fabbietti, L., Fateev, O., Fernandez, C., Finocchiaro, P., Friese, J., Fröhlich, I., Fuentes, B., Garzon, J., Gernhäuser, R., Golubeva, M., Gonzalez, D., Grosse, E., Guber, F., Hehner, J., Heinz, T., Hennino, T., Hlaváè, S., Hoffmann, J., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkoviè, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kopf, U., Kotte, R., Kotuliè-Bunta, J., Krücken, R., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Kurtukian-Nieto, T., Lang, S., Lehnert, J., Maiolino, C., Marín, J., Markert, J., Mishin, Y., Montes, N., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotný, J., Ott, W., Otwinowski, J., Pachmayer, Y., Panebratsev, Y., Pechenov, V., Perez, T., Pietraszko, J., Pleskaè, R., PospíšIl, V., Przygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Rodriguez Prieto, G., Roy-Stephan, M., Rustamov, A., Sabin Fernandez, J., Sadovsky, A., Sailer, B., Salabura, P., Sanchez, M., Sapienza, P., Schmah, A., Schroeder, C., Schwab, E., Senger, P., Simon, R., Smolyankin, V., Smykov, L., Spataro, S., Stelzer, H., Stroebele, H., Stroth, J., Sturm, C., Sudol, M., Titov, A., Toia, A., Traxler, M., Tsertos, H., Vazquez, A., Volkov, Y., Wagner, V., Walus, W., Wang, Y., Winkler, S., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Y., ŽOvinec, D., and Zumbruch, P.

Abstract

The C+C reaction at 2 A GeV has been recently studied using the HADES spectrometer installed at GSI Darmstadt,with the main aim to reconstruct the dielectron signal from the decay of low mass vector mesons.We have analyzed the data with respect to emission of charged hadrons,in order to study production of ð mesons from excited nuclear matter with high temperature and high energy density. Efficient hadron identification is also important for dielectron analysis.The main source of electron pairs at this energy is the neutral ð meson Dalitz decay,so normalization of its yield to charged ð mesons is a natural way for data presentation.Analysis of produced hadrons also allows event characterization,and check of the detector performance. The particle identification method (PID),based on a likelihood technique to select the most probable particle type,is described.In case of hadrons,the particle momentum,velocity and energy loss are used for the PID decision.The performance of the method is evaluated in detailed simulations. Preliminary results of analysis of charged hadron production are presented.The particle yields and transverse mass distributions are shown and interpreted in terms of the thermal model.Results are compared with existing data from previous experiments.

Published
2004

16. Dilepton Analysis in the HADES Spectrometer for C+C at 2 AGeV

Author

Otwinowski, J., Agakichiev, G., Agodi, C., Alvarez-Pol, H., Atkin, E., Balanda, A., Bellia, G., Belver, D., Bielcik, J., Böhmer, M., Bokemeyer, H., Boyard, J., Braun-Munzinger, P., Chepurnov, V., Chernenko, S., Christ, T., Coniglione, R., Daues, H., Diaz, J., Djeridi, R., Dohrmann, F., Duran, I., Eberl, T., Emelianov, V., Fabbietti, L., Fateev, O., Fernandez, C., Finocchiaro, P., Friese, J., Fröhlich, I., Fuentes, B., Garzon, J., Gernhäuser, R., Golubeva, M., Gonzalez-Diaz, D., Grosse, E., Guber, F., Hehner, J., Heinz, T., Hennino, T., Hlavac, S., Hoffmann, J., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kopf, U., Kotte, R., Kotulic-Bunta, J., Krücken, R., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Kutukian-Nieto, T., Lang, S., Lehnert, J., Maiolino, C., Marin, J., Markert, J., Mishin, Y., Montes, N., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, J., Ott, W., Pachmayer, Y., Panebrasev, Y., Pechenov, V., Perez, T., Pietraszko, J., Pleskac, R., Pospisil, V., Pvrzygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Rodrigez Pieto, G., Roy-Stephan, M., Rustamov, A., Sabin, F. J., Sadovsky, A., Sailer, B., Salabura, P., Sanchez, M., Sapienza, P., Schmah, A., Schroeder, C., Schwab, E., Senger, P., Simon, R., Smolyankin, V., Smykov, L., Spataro, S., Stelzer, H., Stroebele, H., Stroth, J., Sturm, C., Sudol, M., Titov, A., Tlusty, P., Toia, A., Traxler, M., Tsertos, H., Vazquez, A., Volkov, Y., Wagner, V., Walus, W., Wang, Y., Winkler, S., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Y., Zovinec, D., Zumbruch, P., Otwinowski, J., Agakichiev, G., Agodi, C., Alvarez-Pol, H., Atkin, E., Balanda, A., Bellia, G., Belver, D., Bielcik, J., Böhmer, M., Bokemeyer, H., Boyard, J., Braun-Munzinger, P., Chepurnov, V., Chernenko, S., Christ, T., Coniglione, R., Daues, H., Diaz, J., Djeridi, R., Dohrmann, F., Duran, I., Eberl, T., Emelianov, V., Fabbietti, L., Fateev, O., Fernandez, C., Finocchiaro, P., Friese, J., Fröhlich, I., Fuentes, B., Garzon, J., Gernhäuser, R., Golubeva, M., Gonzalez-Diaz, D., Grosse, E., Guber, F., Hehner, J., Heinz, T., Hennino, T., Hlavac, S., Hoffmann, J., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kopf, U., Kotte, R., Kotulic-Bunta, J., Krücken, R., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Kutukian-Nieto, T., Lang, S., Lehnert, J., Maiolino, C., Marin, J., Markert, J., Mishin, Y., Montes, N., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, J., Ott, W., Pachmayer, Y., Panebrasev, Y., Pechenov, V., Perez, T., Pietraszko, J., Pleskac, R., Pospisil, V., Pvrzygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Rodrigez Pieto, G., Roy-Stephan, M., Rustamov, A., Sabin, F. J., Sadovsky, A., Sailer, B., Salabura, P., Sanchez, M., Sapienza, P., Schmah, A., Schroeder, C., Schwab, E., Senger, P., Simon, R., Smolyankin, V., Smykov, L., Spataro, S., Stelzer, H., Stroebele, H., Stroth, J., Sturm, C., Sudol, M., Titov, A., Tlusty, P., Toia, A., Traxler, M., Tsertos, H., Vazquez, A., Volkov, Y., Wagner, V., Walus, W., Wang, Y., Winkler, S., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Y., Zovinec, D., and Zumbruch, P.

Abstract

The light meson dilepton identification in the HADES detection system is based on an invariant mass reconstruction of their decay into e+e- pairs. Methods of the dilepton signal reconstruction in the HADES spectrometer and preliminary dilepton spectra for C+C reactions at 2 AGeV are presented in this paper. In the signal reconstruction particularly important is the reduction of the huge combinatorial background arising from wrong combinations of electrons and positrons into un-like sign pairs. A purity of the dilepton signal is determined by using GEANT simulation with the full HADES geometry and a realistic detector response.

Published
2004

17. Study of e+,e production in elementary and nuclear collisions near the production threshold with HADES

Author

Salabura, P., Agakichiev, G., Agodi, C., Alvarez-Pol, H., Balanda, A., Bellia, G., Belvers, D., Bielcik, J., Böhmer, M., Bokemeyer, H., Boyard, J., Braun-Munzinger, P., Chepurnov, V., Chernenko, S., Christ, T., Coniglione, R., Diaz, J., Djeridi, R., Dohrmann, F., Duran, I., Eberl, T., Emeljanov, V., Fabbietti, L., Fateev, O., Fernandez, C., Finocchiaro, P., Friese, J., Fröhlich, I., Fuentes, B., Garzon, J., Gernhäuser, R., Golubeva, M., Gonzalez, D., Grosse, E., Guber, F., Hennino, T., Hlavac, S., Hoffmann, J., Holzmann, R., Ierusalimov, A., Iorii, J., Jaskula, M., Jurkovic, M., Kämpfer, B., Kanakir, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kotte, R., Kotulic-Bunta, J., Krücken, R., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Kurtukian-Nieto, T., Lang, S., Lehnert, J., Maiolino, C., Marn, J., Markert, J., Metag, V., Montes, N., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, J., Otwinowski, J., Pachmayer, Y., Panebratsev, Y., Pechenov, V., Perez, T., Pietraszko, J., Pleskac, R., Pospisil, V., Przygoda, W., Rabin, N., Ramstein, B., Reshetink, A., Ritmanh, J., Rodriguez-Prieto, G., Roy-Stephan, M., Rustamov, A., Sabin-Fernandez, J., Sadovsky, A., Sailer, B., Sanchez, M., Smolyankin, V., Smykov, L., Spataro, S., Spruck, B., Stroebele, H., Stroth, J., C., S., Sudol, M., Titov, A., Tlusty, P., Toia, A., Traxler, M., Tsertos, H., Vazquez, A., Volkov, Y., Wagner, V., Walus, W., Winkler, S., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Y., Zumbruch, P., Salabura, P., Agakichiev, G., Agodi, C., Alvarez-Pol, H., Balanda, A., Bellia, G., Belvers, D., Bielcik, J., Böhmer, M., Bokemeyer, H., Boyard, J., Braun-Munzinger, P., Chepurnov, V., Chernenko, S., Christ, T., Coniglione, R., Diaz, J., Djeridi, R., Dohrmann, F., Duran, I., Eberl, T., Emeljanov, V., Fabbietti, L., Fateev, O., Fernandez, C., Finocchiaro, P., Friese, J., Fröhlich, I., Fuentes, B., Garzon, J., Gernhäuser, R., Golubeva, M., Gonzalez, D., Grosse, E., Guber, F., Hennino, T., Hlavac, S., Hoffmann, J., Holzmann, R., Ierusalimov, A., Iorii, J., Jaskula, M., Jurkovic, M., Kämpfer, B., Kanakir, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kotte, R., Kotulic-Bunta, J., Krücken, R., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Kurtukian-Nieto, T., Lang, S., Lehnert, J., Maiolino, C., Marn, J., Markert, J., Metag, V., Montes, N., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, J., Otwinowski, J., Pachmayer, Y., Panebratsev, Y., Pechenov, V., Perez, T., Pietraszko, J., Pleskac, R., Pospisil, V., Przygoda, W., Rabin, N., Ramstein, B., Reshetink, A., Ritmanh, J., Rodriguez-Prieto, G., Roy-Stephan, M., Rustamov, A., Sabin-Fernandez, J., Sadovsky, A., Sailer, B., Sanchez, M., Smolyankin, V., Smykov, L., Spataro, S., Spruck, B., Stroebele, H., Stroth, J., C., S., Sudol, M., Titov, A., Tlusty, P., Toia, A., Traxler, M., Tsertos, H., Vazquez, A., Volkov, Y., Wagner, V., Walus, W., Winkler, S., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Y., and Zumbruch, P.

Abstract

HADES is a second generation experiment designed to study dielectron production in proton, pion, and heavy ion induced reactions at the GSI accelerator facility in Darmstadt. The physics programme of HADES is focused on in-medium properties of the light vector mesons. In this contribution we present status of the HADES experiment, demonstrate its capability to identify rare dielectron signal, show first experimental results obtained from C+C reactions at 2 A GeV and shortly discuss physics programme of up-coming experimental runs.

Published
2004

18. Studying in-Medium Hadron Properties with HADES

Author

Salabura, P., Dohrmann, F., Grosse, E., Kaempfer, B., Kanaki, K., Kotte, R., Naumann, L., Sadovsky, A., Agakichiev, G., Agodi, C., Alvarez-Pol, H., Balanda, A., Braun-Munzinger, P., Chepurnov, V., Chernenko, S., Christ, T., Coniglione, R., Diaz, J., Djeridi, R., Bellia, G., Belver, D., Bielcik, J., Böhmer, M., Bokemeyer, H., Boyard, J., Duran, I., Eberl., T., Emeljanov, V., Fabbietti, L., Fateev, O., Fernandez, C., Finocchiaro, P., Friese, J., Fröhlich, I., Fuentes, B., Garzon, J., Gernhäuser, R., Golubeva, M., Gonzales, D., Guber, F., Hennino, T., Hlavac, S., Hoffmann, J., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkovic, M., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kotulic-Bunta, J., Krücken, R., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Kurtukian-Nieto, T., Lang, S., Lehnert, J., Maiolino, C., Marin, J., Markert, J., Metag, V., Montes, N., Mousa, J., Münch, M., Müntz, C., Novotny, J., Otwinowski, J., Pachmayer, Y., Panebratsev, Y., Pechenov, V., Perez, T., Pietraszko, J., Pleskac, R., Pospisil, V., Przygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Rodriguez-Prieto, G., Roy-Stephan, M., Rustamov, A., Sabin-Fernandez, J., Sailer, B., Sanchez, M., Smolyankin, V., Smykov, L., Spataro, S., Spruck, B., Stroebele, H., Stroht, J., Sturm, C., Sudol, M., Titov, A., Tlusty, P., Toia, A., Traxler, M., Tsertos, H., Vazquez, A., Volkov, Y., Wagner, V., Walus, W., Winkler, S., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsy, Y., Zumbruch, P., Salabura, P., Dohrmann, F., Grosse, E., Kaempfer, B., Kanaki, K., Kotte, R., Naumann, L., Sadovsky, A., Agakichiev, G., Agodi, C., Alvarez-Pol, H., Balanda, A., Braun-Munzinger, P., Chepurnov, V., Chernenko, S., Christ, T., Coniglione, R., Diaz, J., Djeridi, R., Bellia, G., Belver, D., Bielcik, J., Böhmer, M., Bokemeyer, H., Boyard, J., Duran, I., Eberl., T., Emeljanov, V., Fabbietti, L., Fateev, O., Fernandez, C., Finocchiaro, P., Friese, J., Fröhlich, I., Fuentes, B., Garzon, J., Gernhäuser, R., Golubeva, M., Gonzales, D., Guber, F., Hennino, T., Hlavac, S., Hoffmann, J., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkovic, M., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kotulic-Bunta, J., Krücken, R., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Kurtukian-Nieto, T., Lang, S., Lehnert, J., Maiolino, C., Marin, J., Markert, J., Metag, V., Montes, N., Mousa, J., Münch, M., Müntz, C., Novotny, J., Otwinowski, J., Pachmayer, Y., Panebratsev, Y., Pechenov, V., Perez, T., Pietraszko, J., Pleskac, R., Pospisil, V., Przygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Rodriguez-Prieto, G., Roy-Stephan, M., Rustamov, A., Sabin-Fernandez, J., Sailer, B., Sanchez, M., Smolyankin, V., Smykov, L., Spataro, S., Spruck, B., Stroebele, H., Stroht, J., Sturm, C., Sudol, M., Titov, A., Tlusty, P., Toia, A., Traxler, M., Tsertos, H., Vazquez, A., Volkov, Y., Wagner, V., Walus, W., Winkler, S., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsy, Y., and Zumbruch, P.

Abstract

HADES is a second generation experiment designed to study dielectron production in proton, pion and heavy ion induced reactions at the GSI accelerator facility in Darmstadt. The physics programme of HADES is focused on in-medium properties of the light vector mesons. In this contribution we discuss relevance of dielectron spectroscopy to the problem of hadron mass origin. We present status of the HADES experiment, demonstrate ists capability to identify rare dielectron signal and show first experimental results obtained from C+C reations at 2 AGeV.

Published
2004

19. Dilepton analysis in the HADES spectrometer for C+C at 2AGeV

Author

Bielcik, J, primary, Agakishiev, G, additional, Agodi, C, additional, Alvarez-Pol, H, additional, Balanda, A, additional, Bellia, G, additional, Böhmer, M, additional, Boyard, J L, additional, Braun-Munzinger, P, additional, Chernenko, S, additional, Christ, T, additional, Coniglione, R, additional, Djeridi, R, additional, Dohrmann, F, additional, Durán, I, additional, Eberl, T, additional, Fabbietti, L, additional, Fateev, O, additional, Finocchiaro, P, additional, Friese, J, additional, Fröhlich, I, additional, Garzón, J A, additional, Gernhäuser, R, additional, Golubeva, M, additional, González-Daz, D, additional, Grosse, E, additional, Guber, F, additional, Hennino, T, additional, Hlavac, S, additional, Holzmann, R, additional, Ierusalimov, A, additional, Iori, I, additional, Jaskula, M, additional, Jurkovic, M, additional, Kämpfer, B, additional, Kanaki, K, additional, Karavicheva, T, additional, Koenig, I, additional, Koenig, W, additional, Kolb, B W, additional, Kottel, R, additional, Kotulic-Bunta, J, additional, Krücken, R, additional, Kugler, A, additional, Kühn, W, additional, Kulessa, R, additional, Kurepin, A, additional, Lang, S, additional, Lehnert, J, additional, Maiolino, C, additional, Markert, J, additional, Metag, V, additional, Mousa, J, additional, Münch, M, additional, Müntz, C, additional, Naumann, L, additional, Novotny, R, additional, Novotny, J, additional, Otwinowski, J, additional, Pachmayer, Y C, additional, Pant, L M, additional, Pechenov, V, additional, Pérez, T, additional, Pietraszko, J, additional, Pleskac, R, additional, Pospísil, V, additional, Przygoda, W, additional, Rabin, N, additional, Ramstein, B, additional, Reshetin, A, additional, Ritman, J, additional, Roy-Stephan, M, additional, Rustamov, A, additional, Sadovsky, A, additional, Sailer, B, additional, Salabura, P, additional, Sánchez, M, additional, Sapienza, P, additional, Schmah, A, additional, Simon, R, additional, Smolyankin, V, additional, Smykov, L, additional, Spataro, S, additional, Spruck, B, additional, Stroebele, H, additional, Stroth, J, additional, Sturm, C, additional, Sudol, M, additional, Tlusty, P, additional, Toia, A, additional, Traxler, M, additional, Tsertos, H, additional, Wagner, V, additional, Wisniowski, M, additional, Wojcik, T, additional, Wüstenfeld, J, additional, Zanevsky, Y, additional, Zovinec, D, additional, and Zumbruch, P, additional

Published
2005
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20. Hades experiment: Di-lepton spectroscopy in p + p (2.2 GeV) and C+C (1 and 2 A GeV) collisions

Author

Przygoda, W., Agakishiev, G., Agodi, C., Alvarez-Pol, H., Balanda, A., Bassini, R., Bellia, G., Belver, D., Bielcik, J., Blanco, A., Böhmer, M., Boiano, C., Bortolotti, A., Boyard, J., Brambilla, S., Braun-Munzinger, P., Cabanelas, P., Chernenko, S., Christ, T., Coniglione, R., Dahlinger, M., Díaz, J., Djeridi, R., Dohrmann, F., Durán, I., Eberl, T., Enghardt, W., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Garzón, J., Gernhäuser, R., Golubeva, M., González-Díaz, D., Grosse, E., Guber, F., Heinz, T., Hennino, T., Hlavac, S., Hoffmann, J., Holzmann, R., Ierusalimov, A., Iori, I., Ivashkin, A., Jaskula, M., Jurkovic, M., Kajetanowicz, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Kirschner, D., König, I., König, W., Kolb, B., Kopf, U., Kotte, R., Kotulic-Bunta, J., Krücken, R., Andrej Kugler, Kühn, W., Kulessa, R., Lang, S., Lehnert, J., Maier, L., Maier-Komor, P., Maiolino, C., Marín, J., Markert, J., Metag, V., Montes, N., Moriniere, E., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, R., Novotny, J., Ott, W., Otwinowski, J., Pachmayer, Y., Pérez, T., Pechenov, V., Pietraszko, J., Pinhao, J., Pleskac, R., Pospísil, V., Pullia, A., Rabin, N., Ramstein, B., Riboldi, S., Ritman, J., Rosier, P., Roy-Stephan, M., Rustamov, A., Sadovsky, A., Sailer, B., Salabura, P., Sapienza, P., Schmah, A., Schön, W., Schroeder, C., Schwab, E., Senger, P., Simon, R., Smolyankin, V., Smykov, L., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Sudol, M., Tiflov, V., Tlusty, P., Toia, A., Traxler, M., Tsertos, H., Turzo, I., Wagner, V., Walus, W., Willmott, C., Winkler, S., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Y., and Zumbruch, P.

Subjects
AU COLLISIONS, HOT, HEAVY-ION COLLISIONS, RHO-MESON, NUCLEAR-MATTER, DENSE MATTER, ETA-MESON, ELEMENTARY, ENERGIES, DETECTOR, High Energy Physics::Experiment, Nuclear Experiment, 13.60.Le, 25.75.Dw [PACS numbers]
Abstract

The HADES (High Acceptance Di-Electron Spectrometer) is a tool designed for lepton pair (e+e-) spectroscopy in pion, proton and heavy ion induced reactions in the 1-2 A GeV energy range. One of the goals of the HADES experiment is to study in-medium modifications of hadron properties like effective masses, decay widths, electromagnetic form factors etc. Such effects can be probed with vector mesons (rho , omega , phi ) decaying into e+e- channel. The identification of vector mesons by means of a HADES spectrometer is based on invariant mass reconstruction of e+e- pairs. The combined information from all spectrometer sub-detectors is used to reconstruct the di-lepton signal. The recent results from 2.2 GeV p+p, 1 A GeV and 2 A GeV C+C experiments are presented.

21. Studying in-medium hadron properties with HADES

Author

Salabura, P., Agakishiev, G., Agodi, C., Alvarez-Pol, H., Balanda, A., Bellia, G., Belver, D., Bielcik, J., Bohmer, M., Bokemeyer, H., Boyard, J., Braun-Munzinger, P., Chepurnov, V., Chernenko, S., Christ, T., Coniglione, R., Diaz, J., Djeridi, R., Dohrmann, F., Duran, I., Thomas Eberl, Emelyanov, V., Fabbietti, L., Fateev, O., Fernandez, C., Finocchiaro, P., Friese, J., Frohlich, I., Fuentes, B., Garzon, J., Gernhauser, R., Golubeva, M., Gonzalez-Diaz, D., Grosse, E., Guber, F., Hennino, T., Hlavac, S., Hoffmann, J., Holzmann, R., Jerusalimov, A., Iori, I., Jaskula, M., Jurkovic, M., Kampfer, Burkhard, Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kotte, R., Kotulic-Bunta, J., Krucken, R., Kugler, A., Kuhn, W., Kulessa, R., Kurepin, A., Kurtukian-Nieto, T., Lang, S., Lehnert, J., Maiolino, C., Marin, J., Markert, J., Metag, V., Montes, N., Mousa, J., Munch, M., Muntz, C., Naumann, L., Novotny, J., Otwinowski, J., Pachmayer, Y., Panebratsev, Y., Pechenov, V., Perez, T., Pietraszko, J., Pleskac, R., Pospisil, V., Przygoda, W., Rabin, N., Ramstein, B., Reshetin, A., Ritman, J., Rodriguez-Prieto, G., Roy-Stephan, M., Rustamov, A., Sabin-Fernandez, J., Sadovsky, A., Sailer, B., Sanchez, M., Smolyankin, V., Smykov, L., Spataro, S., Spruck, B., Strobele, H., Stroth, J., Sturm, Christian Thomas, Sudol, M., Titov, A., Tlusty, P., Toia, A., Traxler, M., Tsertos, Haralabos, Vazquez, A., Volkov, Y., Wagner, V., Walus, W., Winkler, S., Wisniowski, M., Wojcik, T., Wustenfeld, J., Zanevsky, Y., and Zumbruch, P.

Subjects
LATTICE QCD, DILEPTON PRODUCTION, ENERGIES, SPECTROMETER, HEAVY-ION COLLISIONS, NUCLEAR-MATTER
Abstract

HADES is a second generation experiment designed to study dielectron production in proton, pion and heavy ion induced reactions at the GSI accelerator facility in Darmstadt. The physics programme of HADES is focused on in-medium properties of the light vector mesons. In this contribution we discuss relevance of dielectron spectroscopy to the problem of hadron mass origin. We present status of the HADES experiment, demonstrate ists capability to identify rare dielectron signal and show first experimental results obtained from C+C reations at 2 AGeV.

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