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15 results on '"Alvarez-Poll, H."'

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. Study of exclusive one-pion and one-eta production using hadron and dielectron channels in pp reactions at kinetic beam energies of 1.25 GeV and 2.2 GeV with HADES

Author

Agakishiev, G., Alvarez-Poll, H., Bałanda, A., Bassini, R., Böhmer, M., Bokemeyer, H., Boyard, J. L., Cabanelas, Pablo, Chernenko, S., Christ, T., Destefanis, M., Dohrmann, F., Dybczak, A., Eberl, T., Fabbietti, L., Fateev, O., Finocchiaro, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gernhäuser, R., Gilardi, C., Golubeva, M., González-Diaz, D., Guber, F., Gumberidze, M., Hennino, T., Holzmann, R., Ierusalimov, A., Iori, I., Ivashkin, A., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Kotte, R., Kozuch, A., Krizek, F., Kühn, W., Kugler, A., Kurepin, A., Lang, S., Lapidus, K., Liu, T., Maier, L., Markert, J., Metag, V., Michalska, B., Morinière, E., Mousa, J., Münch, M., Müntz, C., Naumann, L., Otwinowski, J., Pachmayer, Y. C., Pechenov, V., Pechenova, O., Pérez Cavalcanti, T., Pietraszko, J., Pospisil, V., Przygoda, W., Ramstein, B., Reshetin, A., Roy-Stephan, M., Rustamov, A., Sadovsky, A., Sailer, B., Salabura, P., Sánchez, M., Schmah, A., Schwab, E., Sobolev, Y. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Toia, A., Traxler, M., Trebacz, R., Tsertos, Haralambos, Wagner, V., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Yurevich, S., Zanevsky, Y., 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
Nuclear and High Energy Physics, MESON PRODUCTION, SINGLE-PION, Hadron, SIS ENERGIES, FOS: Physical sciences, Electron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Kinetic energy, 01 natural sciences, Nuclear physics, Pion, 0103 physical sciences, SCATTERING, ddc:530, NEAR-THRESHOLD, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Physics, NUCLEON-NUCLEON COLLISIONS, 010308 nuclear & particles physics, Resonance, Sigma, OF-FLIGHT SPECTROMETER, Helicity, Baryon, proton-proton collisions, High Energy Physics::Experiment, TOTAL CROSS-SECTIONS, INTERMEDIATE ENERGIES
Abstract

We present measurements of exclusive \pi^{+,0} and \eta\ production in pp reactions at 1.25 GeV and 2.2 GeV beam kinetic energy in hadron and dielectron channels. In the case of \pi^+ and \pi^0, high-statistics invariant-mass and angular distributions are obtained within the HADES acceptance as well as acceptance corrected distributions, which are compared to a resonance model. The sensitivity of the data to the yield and production angular distribution of \Delta(1232) and higher lying baryon resonances is shown, and an improved parameterization is proposed. The extracted cross sections are of special interest in the case of pp \to pp \eta, since controversial data exist at 2.0 GeV; we find \sigma =0.142 \pm 0.022 mb. Using the dielectron channels, the \pi^0 and \eta\ Dalitz decay signals are reconstructed with yields fully consistent with the hadronic channels. The electron invariant masses and acceptance corrected helicity angle distributions are found in good agreement with model predictions., Comment: 22 pages, 18 figures, to be published in EPJA

Published
2012

3. Inclusive dielectron production in proton-proton collisions at 2.2 GeV beam energy

Author

Agakishiev, G., Alvarez-Poll, H., Bałanda, A., Bassini, R., Böhmer, M., Bokemeyer, H., Boyard, J. L., Cabanelas, Pablo, Chernenko, S., Christ, T., Destefanis, M., Dohrmann, F., Dybczak, A., Eberl, T., Fabbietti, L., Fateev, O., Finocchiaro, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gernhäuser, R., Gilardi, C., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Hennino, T., Holzmann, R., Ierusalimov, A., Iori, I., Ivashkin, A., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Kotte, R., Kozuch, A., Krizek, F., Kühn, W., Kugler, A., Kurepin, A., Lang, S., Lapidus, K., Liu, T., Maier, L., Markert, J., Metag, V., Michalska, B., Morinière, E., Mousa, J., Münch, C., Müntz, C., Naumann, L., Otwinowski, J., Pachmayer, Y. C., Pechenov, V., Pechenova, O., Perez Cavalcanti, T., Pietraszko, J., Pospísil, V., Przygoda, W., Ramstein, B., Reshetin, A., Roy-Stephan, M., Rustamov, A., Sadovsky, A., Sailer, B., Salabura, P., Sánchez, M., Schmah, A., Schwab, E., Sobolev, Y. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Toia, A., Traxler, M., Trebacz, R., Tsertos, Haralambos, Wagner, V., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Yurevich, S., Zanevsky, Y., Zumbruch, P., 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 Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, ta114, Spectrometer, 010308 nuclear & particles physics, MESON PRODUCTION, FOS: Physical sciences, SIS ENERGIES, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, CROSS-SECTIONS, Nuclear physics, hadrons, Pion, 0103 physical sciences, NUCLEUS REACTIONS, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Beam energy
Abstract

Data on inclusive dielectron production are presented for the reaction p+p at 2.2 GeV measured with the high acceptance dielectron spectrometer (HADES). Our results supplemented data obtained earlier in this bombarding energy regime with the dilepton spectrometer (DLS) and HADES. The comparison with the 2.09 GeV DLS data is discussed. The reconstructed e+e- pair distributions are confronted with simulations, revealing an excess yield at invariant masses around 0.5 GeV/c2. Inclusive cross sections of neutral pion and η production are obtained. © 2012 American Physical Society. 85 5 Cited By :20

Published
2012

4. HADES Collaboration

Author

Agakichiev, G., Agodi, C., Alvarez-Poll, H., Badura, Eugen, Bałanda, A., Bassini, R., Bellia, G., Berdermann, E., Bertini, D., Bielčík, Jaroslav, Boehmer, M., Boiano, C., Bokemeyer, H., Boyard, J., Brambilla, S., Braun-Munzinger, P., Chernenko, S., Christ, T., Coniglione, R., Czok, U., Dahlinger, M., Daues, H. W., Dohrmann, F., Duran, I., Eberl, T., Emeljanov, V., Fabbietti, L., Fateev, O., Finocchiaro, P., Firsov, A., Friese, J., Froehlich, I., Garzon, J. A., Gernhuser, R., Gilardi, C., Golubeva, M., Gonzales, D., Grosse, E., Guber, F., Gringer, H., Hehner, J., Hennino, T., Hlavac, S., Hoffmann, J., Holzmann, R., Ierusalimov, A., Iori, I., Jaskula, M., Jurkovic, M., Kajetanowicz, M., Kmpfer, B., Kanaki, K., Karavicheva, T., Kirschner, D., Koenig, W., Koenig, I., Kolb, B. W., Kotte, R., Krcken, R., Kugler, A., Khn, W., Kulessa, R., Kurepin, A., Lang, S., Lange, J. S., Lehnert, J., Maier, L., Maier-Komor, P., Maiolino, C., Markert, J., Metag, V., Morinière, E., Mousa, J., Mnch, M., Mntz, C., Naumann, L., Novotny, R., Ott, W., Otwinowski, J., Pachmayer, Y. C., Panebratsev, Y., Pant, L., Pechenov, V., Perez, T., Piattelli, P., Pietraszko, J., Pleskac, R., Przygoda, W., Pullia, A., Ramstein, B., Reshetin, A., Ritman, J., Rosier, P., Roy, A., Roy-Stephan, M., Rustamov, A., Sabin Fernandez, J., Sadovski, A., Sailer, B., Salabura, P., Sanchez, M., Sapienza, P., Schmah, A., Schroeder, C., Schfer, D., Shileev, K., Simon, R. S., Skoda, M., Smykov, L., Spataro, S., Spruck, B., Stelzer, H., Stroebele, H., Stroth, J., Sturm, C., Sudol, M., Tiflov, V., Tlusty, P., Toia, A., Traxler, M., Tsertos, Haralambos, Turzo, I., Tyminska, K., Varma, R., Wagner, V., Walus, W., Winkler, S., Wisniowski, M., Wojcik, T., Wstenfeld, J., Zanevsky, Y., Zovinec, D., Zumbruch, P., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Nuclear and High Energy Physics
Abstract

774 1-4 940 941

Published
2014

5. The high-acceptance dielectron spectrometer HADES

Author

Hutsch, J., Krücken, R., Agakichiev, G., Agodi, C., Alvarez-Poll, H., Atkin, E., Badura, Eugen, Bałanda, A., Bassi, A., Bassini, R., Bellia, G., Belver, D., Belyaev, A. V., Benovic, M., Bertini, D., Bielčík, Jaroslav, Böhmer, M., Boiano, C., Bokemeyer, H., Bartolotti, A., Boyard, J. L., Brambilla, S., Braun-Munzinger, P., Cabanelas, Pablo, Castro, E., Chepurnov, V., Chernenko, S., Christ, T., Coniglione, R., Cosentino, L., Dahlinger, M., Daues, H. W., Destefanis, M., Diáz, J., Dohrmann, F., Dressler, R., Durán, I., Dybczak, A., Eberl, T., Enghardt, W., Fabbietti, L., Fateev, O. V., Fernández, C., Finocchiaro, P., Friese, J., Fröhlich, I., Fuentes, B., Galatyuk, T., Garabatos, Chilo, Garzón, J. A., Genolini, B., Gernhäuser, R., Gilardi, C., Gilg, H., Golubeva, M., González-Díaz, D., Grosse, E., Guber, F., Hehner, J., Heidel, K., Heinz, T., Hennino, T., Hlavac, S., Hoffmann, J., Holzmann, R., Homolka, J., Ierusalimov, A. P., Iori, I., Ivashkin, A., Jaskula, M., Jourdain, J. C., Jurkovic, M., Kämpfer, B., Kajetanowicz, M., Kanaki, K., Karavicheva, T., Kastenmüller, A., Kidon, L., Kienle, P., Kirschner, D., Koenig, I., Koenig, W., Körner, H. J., Kolb, B. W., Kopf, U., Korcyl, K., Kotte, R., Kozuch, A., Krizek, F., Kühn, W., Kugler, A., Kulessa, R., Kurepin, A., Kurtukian-Nieto, T., Lang, S., Lange, J. S., Lapidus, K., Lehnert, J., Leinberger, U., Lichtblau, C., Lins, E., Lippmann, C., Lorenz, M., Magestro, D., Maier, L., Maier-Komor, P., Maiolino, C., Malarz, A., Marek, T., Markert, J., Metag, V., Michalska, B., Michel, J., Migneco, E., Mishra, D., Morinière, E., Mousa, J., Münch, M., Müntz, C., Naumann, L., Nekhaev, A., Niebur, W., Novotny, J., Novotny, R., Ott, W., Otwinowski, J., Pachmayer, Y. C., Palka, M., Parpottas, Yiannis, Pechenov, V., Pechenova, O., Cavalcanti, T. P., Petri, M., Piattelli, P., Pietraszko, J., Pleskac, R., Ploskon, M., Pospísil, V., Pouthas, J., Prokopowicz, W., Przygoda, W., Ramstein, B., Reshetin, A., Ritman, J., Roche, G., Rodriguez-Prieto, G., Rosenkranz, K., Rosier, P., Roy-Stephan, M., Rustamov, A., Sabin-Fernandez, J., Sadovsky, A., Sailer, B., Salabura, P., Salz, C., Sánchez, M., Sapienza, P., Schäfer, D., Schicker, R. M., Schmah, A., Schön, H., Schön, W., Schroeder, C., Schroeder, S., Schwab, E., Senger, P., Shileev, K., Simon, R. S., Skoda, M., Smolyankin, V., Smykov, L., Sobiella, M., Sobolev, Y. G., Spataro, S., Spruck, B., Stelzer, H., Ströbele, H., Stroth, J., Sturm, C., Sudoł, M., Suk, M., Szczybura, M., Taranenko, A., Tarantola, A., Teilab, K., Tiflov, V., Tikhonov, A., Tlusty, P., Toia, A., Traxler, M., Trebacz, R., Troyan, A. Y., Tsertos, Haralambos, Turzo, I., Ulrich, A., Vassiliev, D., Vázquez, A., Volkov, Y., Wagner, V., Wallner, C., Walus, W., Wang, Y., Weber, M., Wieser, J., Winkler, S., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Yurevich, S., Zanevsky, Y. V., Zeitelhack, K., Zentek, A., Zhou, P., Zovinec, D., Zumbruch, P., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Nuclear and High Energy Physics, Proton, data acquisition, Cherenkov detector, electron hadron, Hadron, Nuclear Theory, Mesons in nuclear matter, Photon lepton and heavy quark production in relativistic heavy ion collisions, Spectrometers and spectroscopic techniques, Data acquisition and sorting, FOS: Physical sciences, Electron, law.invention, Nuclear physics, Pion, scattering [heavy ion], law, ddc:530, tracking detector, interaction [hadron nucleus], pair production [electron], Vector meson, Nuclear Experiment (nucl-ex), performance [magnetic spectrometer], Nuclear Experiment, 25.75.Cj Photon, lepton, and heavy quark production in relativistic heavy ion collisions, trigger [electron], RICH, Darmstadt SIS, leptonic decay [vector meson], Physics, superconductivity [coil], Spectrometer, track data analysis, Detector, time-of-flight [detector], 29.30.-h Spectrometers and spectroscopic techniques, drift chamber, High Energy Physics::Experiment, particle identification, 29.85.Ca Data acquisition and sorting, 21.65.Jk Mesons in nuclear matter, mass spectrum [electron positron], hadronic [matter]
Abstract

HADES is a versatile magnetic spectrometer aimed at studying dielectron production in pion, proton and heavy-ion-induced collisions. Its main features include a ring imaging gas Cherenkov detector for electron-hadron discrimination, a tracking system consisting of a set of 6 superconducting coils producing a toroidal field and drift chambers and a multiplicity and electron trigger array for additional electron-hadron discrimination and event characterization. A two-stage trigger system enhances events containing electrons. The physics program is focused on the investigation of hadron properties in nuclei and in the hot and dense hadronic matter. The detector system is characterized by an 85% azimuthal coverage over a polar angle interval from 18° to 85°, a single electron efficiency of 50% and a vector meson mass resolution of 2.5%. Identification of pions, kaons and protons is achieved combining time-of-flight and energy loss measurements over a large momentum range (0.1 < p < 1.0 GeV/c). This paper describes the main features and the performance of the detector system. © Società Italiana di Fisica / Springer-Verlag 2009. 41 2 243 277

Published
2009

6. Study of dielectron production in C + C collisions at 1 A GeV

Author

Krücken, R., Agakishiev, G., Agodi, C., Alvarez-Poll, H., Bałanda, A., Bassini, R., Bellia, G., Belver, D., Belyaev, A., Blanco, A., Böhmer, M., Bortolotti, A., Boyard, J. L., Braun-Munzinger, P., Cabanelas, Pablo, Castro, E., Chernenko, S., Christ, T., Destefanis, M., Diáz, J., Dohrmann, F., Dybczak, A., Eberl, T., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gernhäuser, R., Gil, A., Gilardi, C., Golubeva, M., González-Díaz, D., Grosse, E., Guber, F., Heilmann, M., Heinz, T., Hennino, T., Holzmann, R., Ierusalimov, A., Iori, I., Ivashkin, A., Jurkovic, M., Kämpfer, B., Kajetanowicz, M., Kanaki, K., Karavicheva, T., Kirschner, D., Koenig, I., Koenig, W., Kolb, B. W., Kotte, R., Kozuch, A., Krása, Antonín, Krizek, F., Kühn, W., Kugler, A., Kurepin, A., Lamas-Valverde, J., Lang, S., Lange, J. S., Lapidus, K., Lopes, L., Maier, L., Mangiarotti, A., Marín, J., Markert, J., Metag, V., Michalska, B., Mishra, D., Morinière, E., Mousa, J., Münch, M., Müntz, C., Naumann, L., Novotny, R., Otwinowski, J., Pachmayer, Y. C., Palka, M., Parpottas, Yiannis, Pechenov, V., Pechenova, O., Pérez Cavalcanti, T., Pietraszko, J., Pleskac, R., Pospísil, V., Przygoda, W., Ramstein, B., Reshetin, A., Roy-Stephan, M., Rustamov, A., Sadovsky, A., Sailer, B., Salabura, P., Schmah, A., Schroeder, C., Schwab, E., Simon, R. S., Sobolev, Yu G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Sudol, M., Tarantola, A., Teilab, K., Tlusty, P., Toia, A., Traxler, M., Trebacz, R., Tsertos, Haralambos, Veretenkin, I., Wagner, V., Weber, M., Wen, H., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Yurevich, S., Zanevsky, Y., Zhou, P., Zumbruch, P., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Dilepton spectroscopy, Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment, DLS puzzle, Excess yield, Excitation function, Heavy-ion reactions
Abstract

The emission of e+ e- pairs from C + C collisions at an incident energy of 1 GeV per nucleon has been investigated. The measured production probabilities, spanning from the π0-Dalitz to the ρ / ω invariant-mass region, display a strong excess above the cocktail of standard hadronic sources. The bombarding-energy dependence of this excess is found to scale like pion production, rather than like eta production. The data are in good agreement with results obtained in the former DLS experiment. © 2008 Elsevier B.V. All rights reserved. 663 1-2 43 48

Published
2008

7. Dielectron production in C12+C12 collisions at 2AGeV with the HADES spectrometer

Author

Krücken, R., Agakichiev, G., Agodi, C., Alvarez-Poll, H., Bałanda, A., Bertini, D., Bielčík, Jaroslav, Bellia, G., Böhmer, M., Bokemeyer, H., Boyard, J. L., Braun-Munzinger, P., Cabanelas, Pablo, Chernenko, S., Christ, T., Coniglione, R., Cosentino, L., Diáz, J., Dohrmann, F., Durán, I., Eberl, T., Enghardt, W., Fabbietti, L., Fateev, O., Fernandez, C., Finocchiaro, P., Friese, J., Fröhlich, I., Fuentes, B., Garabatos, Chilo, Garzón, J. A., Gernhäuser, R., Gilardi, C., Golubeva, M., González-Díaz, D., Grosse, E., Guber, F., Hennino, T., Hlavac, S., Holzmann, R., Homolka, J., Ierusalimov, A., Iori, I., Ivashkin, A., Jaskuła, M., Jurkovic, M., Kagarlis, M., Kajetanowicz, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Kastenmüller, A., Kidoń, L., Kienle, P., Koenig, I., Koenig, W., Körner, H. J., Kolb, B. W., Kotte, R., Kugler, A., Kühn, W., Kulessa, R., Kurepin, A., Lang, S., Lange, S., Lehnert, J., Lins, E., Magestro, D., Maiolino, C., Malarz, A., Markert, J., Metag, V., Mousa, J., Münch, M., Müntz, C., Naumann, L., Nekhaev, A., Novotny, J., Otwinowski, J., Pachmayer, Y. C., Pechenov, V., Pérez, T., Piattelli, P., Pietraszko, J., Pleskac, R., Płoskoń, M., Pospísil, V., Prokopowicz, W., Przygoda, W., Ramstein, B., Reshetin, A., Ritman, J., Roy-Stephan, M., Rustamov, A., Sadovsky, A., Sailer, B., Salabura, P., Sánchez, M., Sapienza, P., Schmah, A., Schön, H., Schön, W., Schröder, C., Schwab, E., Simon, R. S., Smolyankin, V., Smykov, L., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Sudoł, M., Suk, M., Taranenko, A., Tlusty, P., Toia, A., Traxler, M., Tsertos, Haralambos, Vassiliev, D., Vázquez, A., Wagner, V., Waluś, W., Wiśniowski, M., Wójcik, T., Wüstenfeld, J., Zanevsky, Y., Zeitelhack, K., Zovinec, D., Zumbruch, P., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Baryon-resonance, Dalitz decays, Spectrometers, Transport properties, Vector-meson decays, Vacuum applications, Electron beams, High Energy Physics::Experiment, Nuclear Experiment, Resonance, Mass spectrometers
Abstract

The invariant-mass spectrum of e+e- pairs produced in C12+C12 collisions at an incident energy of 2 GeV per nucleon has been measured for the first time. The measured pair production probabilities span over 5 orders of magnitude from the π0-Dalitz to the ρ/ω invariant-mass region. Dalitz decays of π0 and η account for all the yield up to 0.15GeV/c2, but for only about 50% above this mass. A comparison with model calculations shows that the excess pair yield is likely due to baryon-resonance and vector-meson decays. Transport calculations based on vacuum spectral functions fail, however, to describe the entire mass region. © 2007 The American Physical Society. 98 5 Cited By :118

Published
2007

8. 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

9. 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

10. 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

11. 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

12. 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

13. 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

14. DILEPTON ANALYSIS IN THE HADES SPECTROMETER FOR 12C+12C AT 2 AGEV.

Author

Otwinowski, J., Aagakichiev, G., Agodi, C., Alvarez-Poll, H., Balanda, A., Bellia, G., Bielcik, J., 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., and Fateev, O.

Subjects
DILEPTON production, SPECTROMETERS, LIGHT, ELECTRONS, HADRONS, PERMUTATIONS, NUCLEAR physics
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. [ABSTRACT FROM AUTHOR]

Published
2005

15. Dilepton production in ion-ion collisions studied using HADES

Author

Krücken, R., Kugler, A., Agakichiev, H., Agodi, C., Alvarez-Poll, H., Bałanda, A., Bellia, G., Bertini, D., Bielčík, Jaroslav, Böhmer, M., Bokemeyer, H., Boyard, J. L., Braun-Munzinger, P., Cabanelas, Pablo, Chernenko, S., Christ, T., Coniglione, R., Cosentino, L., Diáz, J., Dohrmann, F., Duran, I., Eberl, T., Enghardt, W., Fabbietti, L., Fateev, O., Fernandez, C., Finocchiaro, P., Friese, J., Fröhlich, I., Fuentes, B., Garabatos, Chilo, Garzon, J. A., Gernhäuser, R., Gilardi, C., Golubeva, M., Gonzales-Diaz, D., Grosse, E., Guber, F., Hennino, Th, Hlavac, S., Holzmann, R., Homolka, J., Ierusalimov, A., Iori, I., Ivashkin, A., Jaskula, M., Jurkovic, M., Kagarlis, M., Kajetanowicz, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Kastenmüller, A., Kidon, L., Kienle, P., Koenig, I., Koenig, W., Körner, H. -J, Kolb, B. W., Kotte, R., Krizek, F., Kühn, W., Kulessa, R., Kurepin, A., Lang, S., Lange, S., Lehnert, J., Lins, E., Magestro, D., Maiolino, C., Malarz, A., Markert, J., Metag, V., Mousa, J., Münch, M., Müntz, C., Naumann, L., Nekhaev, A., Novotny, R., Otwinowski, J., Pachmayer, Y. C., Pechenov, V., Perez, T., Piattelli, P., Pietraszko, J., Pleskac, R., Ploskon, M., Pospisil, V., Prokopowicz, W., Przygoda, W., Ramstein, B., Reshetin, A., Ritman, J., Roy-Stephan, M., Rustamov, A., Sadovski, A., Sailer, B., Salabura, P., Sanchez, M., Sapienza, P., Schmah, A., Schön, H., Schroeder, C., Schwab, E., Simon, R., Smoliankin, V., Smykov, L., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Sudol, M., Taranenko, A., Tlusty, P., Toia, A., Traxler, M., Tsertos, Haralambos, Turzo, I., Vassiliev, D., Vazquez, A., Wagner, V., Walus, W., Wiśniowski, M., Wojcik, T., Wüstenfeld, J., Zanevsky, Yu, Zeitelhack, K., Zovinec, D., Zumbruch, P., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Physics, Particle physics, spectrometers, Proton, Spectrometer, Relativistic heavy ion collisions, Hadrons, Ion, lepton production, Nuclear physics, Nuclear medium, Pion, heavy ion-nucleus reactions, quark models
Abstract

The High-Acceptance Di-Electron Spectrometer installed at GSI Darmstadt is a second generation experiment to study production of dielectron pairs from proton, pion and nucleus induced reactions at the SIS/BEVALAC energy regime. During period 2002-4 medium-resolution data have been taken with HADES on the light C+C system at 1 and 2 AGeV. The data analysis confirms former finding of the DLS collaboration. First physics run on slightly heavier system Ar+KCl was carried out will almost full HADES setup at 2005. © 2007 American Institute of Physics. 947 436 440 Sponsors: U. S. National Science Foundation Physics Latin American Center

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