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521 results on '"Dybczak A."'

201. Study of the quasi-freenp→npπ+π−reaction with a deuterium beam at 1.25 GeV/nucleon

Author

Agakishiev, G., primary, Balanda, A., additional, Belver, D., additional, Belyaev, A.V., additional, Blanco, A., additional, Böhmer, M., additional, Boyard, J.L., additional, Braun-Munzinger, P., additional, Cabanelas, P., additional, Castro, E., additional, Chernenko, S., additional, Christ, T., additional, Destefanis, M., additional, Díaz, J., additional, Dohrmann, F., additional, Dybczak, A., additional, Fabbietti, L., additional, Fateev, O.V., additional, Finocchiaro, P., additional, Fonte, P., additional, Friese, J., additional, Fröhlich, I., additional, Galatyuk, T., additional, Garzón, J.A., additional, Gernhäuser, R., additional, Gil, A., additional, Gilardi, C., additional, Göbel, K., additional, Golubeva, M., additional, González-Díaz, D., additional, Guber, F., additional, Gumberidze, M., additional, Hennino, T., additional, Holzmann, R., additional, Ierusalimov, A., additional, Iori, I., additional, Ivashkin, A., additional, Jurkovic, M., additional, Kämpfer, B., additional, Karavicheva, T., additional, Kirschner, D., additional, Koenig, I., additional, Koenig, W., additional, Kolb, B.W., additional, Kotte, R., additional, Krizek, F., additional, Krücken, R., additional, Kühn, W., additional, Kugler, A., additional, Kurepin, A., additional, Kurilkin, A., additional, Kurilkin, P., additional, Ladygin, V., additional, Lang, S., additional, Lange, J.S., additional, Lapidus, K., additional, Liu, T., additional, Lopes, L., additional, Lorenz, M., additional, Maier, L., additional, Mangiarotti, A., additional, Markert, J., additional, Metag, V., additional, Michalska, B., additional, Michel, J., additional, Morinière, E., additional, Mousa, J., additional, Müntz, C., additional, Naumann, L., additional, Otwinowski, J., additional, Pachmayer, Y.C., additional, Palka, M., additional, Parpottas, Y., additional, Pechenov, V., additional, Pechenova, O., additional, Pietraszko, J., additional, Przygoda, W., additional, Ramstein, B., additional, Reshetin, A., additional, Rustamov, A., additional, Sadovsky, A., additional, Salabura, P., additional, Schmah, A., additional, Schwab, E., additional, Sobolev, Yu.G., additional, Spataro, S., additional, Spruck, B., additional, Ströbele, H., additional, Stroth, J., additional, Sturm, C., additional, Tarantola, A., additional, Teilab, K., additional, Tlusty, P., additional, Traxler, M., additional, Trebacz, R., additional, Tsertos, H., additional, Wagner, V., additional, Vasiliev, T., additional, Weber, M., additional, Wisniowski, M., additional, Wojcik, T., additional, Wüstenfeld, J., additional, Yurevich, S., additional, Zanevsky, Y., additional, and Zhou, P., additional

Published
2015
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202. Inclusive pion andηproduction inp+Nb collisions at 3.5 GeV beam energy

Author

M.B. Golubeva, B. Spruck, Yu.V. Zanevsky, J. A. Garzón, P. Tlusty, Kirill Lapidus, Andrey Reshetin, M. Jurkovic, A. M. Schmah, C. Wendisch, Kathrin Göbel, I. Koenig, Laura Fabbietti, A. Balanda, S. Lang, R. Trebacz, F.F. Guber, S. Spataro, H. Ströbele, K. Teilab, S. Yurevich, Yu. G. Sobolev, B. Kämpfer, I. Iori, G. Agakishiev, C. Sturm, I. Fröhlich, M. Böhmer, A. Mangiarotti, V. Wagner, C. Müntz, J. L. Boyard, V. Metag, M. Lorenz, T. Heinz, E. Epple, Paolo Finocchiaro, Yvonne Chiara Pachmayer, Alexander Belyaev, V. P. Ladygin, L. Maier, R. Holzmann, J. Markert, M. Gumberidze, B. W. Kolb, J. Stroth, J. Friese, T. Hennino, W. Koenig, A. Blanco, P. Fonte, A. Ivashkin, R. Kotte, Roman Gernhäuser, H. Kuc, G. Kornakov, O. V. Fateev, A. Kugler, Yiannis Parpottas, Tatiana Karavicheva, L. Naumann, V. Pechenov, P. Cabanelas, Alexey Kurepin, D. González-Díaz, Marc Weber, W. Kühn, P. Salabura, H. Tsertos, A. Tarantola, Tetyana Galatyuk, R. Lalik, T. Liu, A. Lebedev, B. Ramstein, L. Lopes, S. P. Chernenko, Filip Krizek, R. Krücken, A. Dybczak, D. Belver, J. Michel, J. C. Berger-Chen, J. Wüstenfeld, M. Traxler, A. Krása, J. Siebenson, T. A. Vasiliev, Witold Przygoda, O. Pechenova, Marek Palka, E. Schwab, A. Sadovsky, J. Pietraszko, A.P. Ierusalimov, B. Michalska, and A. Rustamov

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Nuclear Theory, Transport theory, Kinetic energy, 01 natural sciences, Nuclear physics, Pion, 0103 physical sciences, High Energy Physics::Experiment, Rapidity, Production (computer science), Nuclear Experiment, 010306 general physics, Beam energy, Energy (signal processing)
Abstract

Data on inclusive pion and $\ensuremath{\eta}$ production measured with the dielectron spectrometer HADES in the reaction $p+{}^{93}\mathrm{Nb}$ at a kinetic beam energy of 3.5 GeV are presented. Our results, obtained with the photon-conversion method, supplement the rather sparse information on neutral-meson production in proton-nucleus reactions existing for this bombarding energy regime. The reconstructed ${e}^{+}{e}^{\ensuremath{-}}{e}^{+}{e}^{\ensuremath{-}}$ transverse-momentum and rapidity distributions are confronted with transport-model calculations, which account fairly well for both ${\ensuremath{\pi}}^{0}$ and $\ensuremath{\eta}$ production.

Published
2013

203. New data on the differential cross section of dp-elastic scattering at 2.5 GeV with HADES Detector

Author

F.F. Guber, M. Böhmer, A. Mangiarotti, B. Kämpfer, J. A. Garzón, M. Gumberidze, A. Sadovsky, Yiannis Parpottas, P. Huck, H. Schuldes, M. Jurkovic, J. Friese, C. Höhne, A. K. Kurilkin, T. A. Vasiliev, A.P. Ierusalimov, Alexey Kurepin, D. González-Díaz, D. Belver, C. Wendisch, V. Pechenov, M.B. Golubeva, L. Lopes, C. Sturm, Yu.V. Zanevsky, P. K. Kurilkin, T. Galatyuk, Piotr Salabura, L. Maier, A. Rustamov, A. Lebedev, K. Gill, H. Kuc, Andrey Reshetin, S. Yurevich, R. Holzmann, L. Naumann, M. Weber, Filip Krizek, R. H. Munzer, J. Markert, O. Pechenova, B. Ramstein, L. Rehnisch, C. Dritsa, M. Traxler, V. Metag, J. Pietraszko, M. Lorenz, P. Cabanelas, A. Tarantola, H. Ströbele, S. P. Chernenko, K. Teilab, O. V. Fateev, V. Wagner, J. Michel, Yu. G. Sobolev, A. Kugler, S. Harabasz, E. Krebs, P. Tlusty, C. Müntz, J. Wüstenfeld, Kirill Lapidus, J. Siebenson, T. Scheib, H. Tsertos, J. Stroth, Marek Palka, O. Svoboda, G. Korcyl, W. Koenig, R. Lalik, Laura Fabbietti, S. Spataro, I. Fröhlich, S. Lang, G. Kornakov, Tatiana Karavicheva, C. Behnke, Eliane Epple, Alexander Belyaev, G. Agakishiev, T. Hennino, I. Koenig, A. Blanco, P. Fonte, A. Ivashkin, R. Kotte, P. Strzempek, Christoph Blume, A. Dybczak, J. C. Berger-Chen, A. Krása, B. W. Kolb, Witold Przygoda, and V. P. Ladygin

Subjects
Physics, Elastic scattering, Nuclear physics, Spectrometer, Deuterium, Scattering, Nuclear Theory, Detector, Center of mass, Nuclear Experiment, Wave function, Kinetic energy
Abstract

New results on the differential cross section in deuteron-proton elastic scattering are obtained at the deuteron kinetic energy of 2.5 GeV with the HADES spectrometer. The angular range of 69°-125° in the center of mass system is covered. The obtained results are compared with the relativistic multiple scattering model calculation using the CD-Bonn deuteron wave function. The data at fixed scattering angles in the c.m. are in qualitative agreement with the constituent counting rules prediction.

Published
2013

204. Inclusive pion and $\eta$ production in p+Nb collisions at 3.5 GeV beam energy

Author

Agakishiev, G., Balanda, A., Belver, D., Belyaev, A., Berger-Chen, J. C., Blanco, A., Boehmer, M., Boyard, J. L., Cabanelas, P., Chernenko, S., Dybczak, A., Epple, E., Fabbbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Froehlich, I., Galatyuk, T., Garzon, J. A., Gernhaeuser, R., Goebel, K., Golubeva, M., Gonzalez-Diaz, D., Guber, F., Gumberidze, M., Heinz, T., Hennino, T., Holzmann, R., Ierusalimov, A., Iori, I., Ivashkin, A., Jurkovic, M., Kaempfer, B., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Kornakov, G., Kotte, R., Krasa, A., Krizek, F., Kruecken, R., Kuc, H., Kuehn, W., Kugler, A., Kurepin, A., Ladygin, V., Lalik, R., Lang, S., Lapidus, K., Lebedev, A., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Muentz, C., Naumann, L., Pachmayer, Y. C., Palka, M., Parpottas, Y., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Yu. G., Spataro, S., Spruck, B., Stroebele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, H., Vasiliev, T., Wagner, V., Weber, M., Wendisch, C., Wuestenfeld, J., Yurevich, S., Zanevsky, Y., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and HADES

Subjects
Nuclear Theory, FOS: Physical sciences, High Energy Physics::Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

Data on inclusive pion and eta production measured with the dielectron spectrometer HADES in the reaction p+93Nb at a kinetic beam energy of 3.5 GeV are presented. Our results, obtained with the photon conversion method, supplement the rather sparse information on neutral meson production in proton-nucleus reactions existing for this bombarding energy regime. The reconstructed e+e-e+e- transverse-momentum and rapidity distributions are confronted with transport model calculations, which account fairly well for both pi0 and eta production., 12 pages, 9 figures, submitted to Physical Review C

Published
2013

205. Deep sub-threshold $K^\ast (892)^{\circ}$ production in collisions of Ar + KCl at 1.76 A GeV

Author

Agakishiev, G., Bałanda, Andrzej, Bassini, R., Belver, D., Belyaev, A. V., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, P., Castro, E., Chernenko, S., Christ, T., Destefanis, M., Díaz, J., Dohrmann, F., Dybczak, Adrian, Eberl, T., Epple, E., Fabbietti, L., Fateev, O. V., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gernhäuser, R., Gil, A., Gilardi, C., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Heilmann, M., Heinz, T., Hennino, T., Holzmann, R., Huck, P., Iori, I., Ivashkin, A., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Kirschner, D., Koenig, I., Koenig, W., Kolb, B. W., Kotte, R., Krizek, F., Krücken, R., Kühn, W., Kugler, A., Kurepin, A., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, Beata, Michel, J., Mishra, D., Morinière, E., Mousa, J., Müntz, C., Naumann, L., Otwinowski, Jacek, Pachmayer, Y. C., Pałka, Marek, Parpottas, Y., Pechenov, V., Pechenova, O., Cavalcanti, T. Pérez, Pietraszko, J., Przygoda, Witold, Ramstein, B., Reshetin, A., Roy-Stephan, M., Rustamov, A., Sadovsky, A., Sailer, B., Salabura, Piotr, Schmah, A., Schwab, E., Siebenson, J., Sobolev, Yu. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trębacz, Radosław, Tsertos, H., Wagner, V., Weber, M., Wendisch, C., Wiśniowski, Marcin, Wójcik, T., Wüstenfeld, J., Yurevich, S., Zanevsky, Y. V., and Zumbruch, P.

Published
2013

206. Searching a Dark Photon with HADES

Author

Agakishiev, G., Balanda, A., Belver, D., Belyaev, A., Berger-Chen, J. C., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, P., Chernenko, S., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzon, J. A., Gernhäuser, R., Göbel, K., Golubeva, M., Gonzalez-Diaz, D., Guber, F., Gumberidze, M., Heinz, T., Hennino, T., Holzmann, R., Ierusalimov, A., Iori, I., Ivashkin, A., Jurkovic, M., Kämpfer, B., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Kornakov, G., Kotte, R., Krasa, A., Krizek, F., Krücken, R., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Ladygin, V., Lalik, R., Lang, S., Lapidus, K., Lebedev, A., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Müntz, C., Naumann, L., Pachmayer, Y. C., Palka, M., Parpottas, Y., Pechenov, V., Pechenova, O., Petousis, V., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Y. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, H., Vasiliev, T., Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., and Zanevsky, Y.

Abstract

We present a search for the e+e- decay of a dark photon, also known as U vector boson, in inclusive dielectron spectra measured by HADES in the 3.5 GeV p+p and p+Nb reactions, as well as the 1.756 GeV/u Ar+KCl reaction. An upper limit on the kinetic mixing parameter squared ε2 at 90% CL has been obtained for the mass range MU = 0.02 - 0.55 GeV/c2 and is compared with the present world data set. For masses 0.03 - 0.1 GeV/c2, the limit has been lowered with respect to previous results, allowing now to exclude a large part of the parameter region favoured by the muon g -2 anomaly. Furthermore, an improved upper limit of 2.3x10-6 has been set on the helicity-suppressed direct decay of the eta meson, η-> e+e-, at 90% CL.

Published
2013

207. Baryonic resonances close to the $\mathit{\bar{K}N}$ threshold : the case of $\Lambda$ (1405) in $\mathit{pp}$ collisions

Author

Agakishiev, G., Bałanda, Andrzej, Belver, D., Belyaev, A., Berger-Chen, J. C., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, P., Castro, E., Chernenko, S., Christ, T., Destefanis, M., Dohrmann, F., Dybczak, Adrian, Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gernhäuser, R., Gilardi, C., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Heinz, T., 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., Krása, A., Krizek, F., Krücken, R., Kuc, Hubert, Kühn, W., Kugler, A., Kurepin, A., Lalik, R., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, Beata, Michel, J., Morinière, E., Mousa, J., Müntz, C., Münzer, R., Naumann, L., Otwinowski, Jacek, Pachmayer, Y. C., Pałka, Marek, Parpottas, Y., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, Witold, Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, Piotr, Schmah, A., Schwab, E., Siebenson, J., Sobolev, Yu. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trębacz, Radosław, Tsertos, H., Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., and Zanevsky, Y.

Published
2013

208. An upper limit on hypertriton production in collisions of Ar(1.76 A GeV) + KCl

Author

Krücken, R., Agakishiev, G., Belver, D., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, Pablo, Castro, E., Chernenko, S., Destefanis, M., Dohrmann, F., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gernhäuser, R., Gilardi, C., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Heinz, T., Hennino, T., Holzmann, R., Iori, I., Ivashkin, A., Jurkovic, M., Kämpfer, B., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Kotte, R., Krása, Antonín, Krizek, F., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Morinière, E., Mousa, J., Müntz, C., Naumann, L., Pachmayer, Y. C., Palka, M., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Rehnisch, L., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Scheib, T., Schmah, A., Schuldes, H., Schwab, E., Siebenson, J., Sobolev, Y. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, Haralambos, Wagner, V., Weber, M., Wendisch, C., Wisniowski, M., Wüstenfeld, J., Yurevich, S., Zanevsky, Y., Tsertos, Haralambos [0000-0001-5966-343X], Institut de Physique Nucléaire d'Orsay (IPNO), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Branching fraction, Hadron, Hyperon, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Lambda, 01 natural sciences, Nuclear physics, Pion, 0103 physical sciences, 010306 general physics, Hypertriton
Abstract

A high-statistic data sample of Ar(1.76 AGeV)+KCl events recorded with HADES is used to search for a hypertriton signal. An upper production limit per centrality-triggered event of $ 1.04\times 10^{-3}$ on the 3 $ \sigma$ level is derived. Comparing this value with the number of successfully reconstructed $ \Lambda$ hyperons allows to determine an upper limit on the ratio $ N_{_{\Lambda}^{3}H}/N_{\Lambda}$ , which is confronted with statistical and coalescence-type model calculations.

Published
2013

209. Deep sub-threshold K*(892)0 production in collisions of Ar + KCl at 1.76A GeV

Author

Krücken, R., Agakishiev, G., Bałanda, A., Bassini, R., Belver, D., Belyaev, A. V., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, Pablo, Castro, E., Chernenko, S., Christ, T., Destefanis, M., Diáz, J., Dohrmann, F., Dybczak, A., Eberl, T., Epple, E., Fabbietti, L., Fateev, O. V., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gernhäuser, R., Gil, A., Gilardi, C., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Heilmann, M., Heinz, T., Hennino, T., Holzmann, R., Huck, P., Iori, I., Ivashkin, A., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Kirschner, D., Koenig, I., Koenig, W., Kolb, B. W., Kotte, R., Krizek, F., Kühn, W., Kugler, A., Kurepin, A., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Mishra, D., Morinière, E., Mousa, J., Müntz, C., Naumann, L., Otwinowski, J., Pachmayer, Y. C., Palka, M., Parpottas, Yiannis, Pechenov, V., Pechenova, O., Pérez Cavalcanti, T., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Roy-Stephan, M., Rustamov, A., Sadovsky, A., Sailer, B., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Y. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, Haralambos, Wagner, V., Weber, M., Wendisch, C., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Yurevich, S., Zanevsky, Y. V., Zumbruch, P., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Meson, 010308 nuclear & particles physics, Branching fraction, Hadron, 7. Clean energy, 01 natural sciences, Hadronization, Nuclear physics, 0103 physical sciences, Production (computer science), Atomic physics, 010306 general physics, Nuclear Experiment, Energy (signal processing), Dimensionless quantity
Abstract

Results on the deep sub-threshold production of the short-lived hadronic resonance K*(892)0 are reported for collisions of Ar + KCl at 1.76A GeV beam energy, studied with the High Acceptance Di-Electron Spectrometer (HADES) at SIS18/GSI. The K*(892)0 production probability per central collision of \( P_{K^{*0}}=(4.4\pm 1.1 \pm 0.5)\times 10^{-4}\) and the K*(892)0/K0 ratio of \( P_{K^{*0}}/P_{K^0}=(1.9\pm 0.5\pm 0.3)\times 10^{-2}\) are determined at the lowest energy so far (i.e. deep below the threshold for the corresponding production in nucleon-nucleon collisions, \( \sqrt{s_{NN}}-\sqrt{s_{thr}}=-340\) MeV). The K*0/K0 ratio is compared with results of other experiments and with the predictions of the UrQMD transport approach and of the statistical hadronization model. The experimental K*0 yield and the K*0/K0 ratio are overestimated by the transport model by factors of about five and two, respectively. In a chemically equilibrated medium the ratio corresponds to a temperature of the thermalized system being systematically lower than the value determined by the yields of the stable and long-lived hadrons produced in Ar + KCl collisions. From the present measurement, we conclude that sub-threshold K* production either cannot be considered to proceed in a system being in thermal equilibrium or these short-lived resonances appear undersaturated, for example as a result of the rescattering of the decay particles in the ambient hadronic medium.

Published
2013

210. Baryonic resonances close to the K̄N threshold: The case of Λ(1405) in pp collisions

Author

Krücken, R., Agakishiev, G., Bałanda, A., Belver, D., Belyaev, A., Berger-Chen, J. C., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, Pablo, Castro, E., Chernenko, S., Christ, T., Destefanis, M., Dohrmann, F., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gernhäuser, R., Gilardi, C., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Heinz, T., 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., Krása, Antonín, Krizek, F., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Lalik, R., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Morinière, E., Mousa, J., Müntz, C., Münzer, R., Naumann, L., Otwinowski, J., Pachmayer, Y. C., Palka, M., Parpottas, Yiannis, Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Y. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, Haralambos, Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., Zanevsky, Y., and Tsertos, Haralambos [0000-0001-5966-343X]

Abstract

We present an analysis of the Λ(1405) resonance produced in the reaction p+p→Σ±+π+K++p at 3.5GeV kinetic beam energy measured with the High Acceptance Dielectron Spectrometer (HADES) at the Gesellschaft für Schwerionenforschung (GSI). The two charged decay channels Λ(1405)→Σ±π â̂ have been reconstructed for the first time in p+p collisions. The efficiency and acceptance-corrected spectral shapes show a peak position clearly below 1400MeV/c2. We find a total production cross section of σΛ(1405)=9.2±0.9±0.7-1.0+3.3μb. The analysis of its polar angle distribution suggests that the Λ(1405) is produced isotropically in the p-p center-of-mass system (CMS). © 2013 American Physical Society. 87 2 Cited By :39

Published
2013

211. Hades experiments : investigation of hadron in-medium properties

Author

Salabura, P., Agakishiev, G., Behnke, C., Belver, D., Belyaev, A., Berger-Chen, J. C., Blanco, A., Blume, C., Böhmer, M., Cabanelas, Pablo, Chernenko, S., Dritsa, Christina, Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gill, K., Golubeva, M., Gonázlez-Díaz, D., Guber, F., Gumberidze, M., Harabasz, S., Hennino, T., Holzmann, R., Huck, P., Höhne, C., Ierusalimov, A., Ivashkin, A., Jurkovic, M., Kämpfer, B., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Korcyl, G., Kornakov, G., Kotte, R., Krása, Antonín, Krebs, E., Krizek, F., Kuc, H., Kugler, A., Kurepin, A., Kurilkin, A., Kurilkin, P., Ladygin, V., Lalik, R., Lang, S., Lapidus, K., Lebedev, A., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michel, J., Müntz, C., Münzer, R., Naumann, L., Palka, M., Parpottas, Yiannis, Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Rehnisch, L., Reshetin, A., Rustamov, A., Sadovsky, A., Scheib, T., Schuldes, H., Siebenson, J., Sobolev, Y. G., Spataro, S., Ströbele, H., Stroth, J., Strzempek, P., Sturm, C., Svoboda, O., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Tsertos, Haralambos, Vasiliev, T., Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., Zanevsky, Y., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Nuclear reaction, Many-body effect, History, Particle physics, Meson, Hadron, Nuclear Theory, Elementary particle, Hadrons, 01 natural sciences, Particle identification, Education, Nuclear physics, Colliding beam accelerators, 0103 physical sciences, Hadron in-medium properties, 010306 general physics, Nuclear Experiment, Physics, Heavy ion collision, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Strangeness production, Second generation, Nuclear matter, ddc, Computer Science Applications, Baryon, Particle identifications, Baryonic matter, Chiral symmetry restoration, Experiments
Abstract

Hadron modifications in nuclear matter are discussed in connection to chiral symmetry restoration and/or hadronic many body effects. Experiments with photon, proton and heavy ion beams are used to probe properties of hadrons embedded in nuclear matter at different temperatures and densities. Most of the information has been gathered for the light vector mesons ρ ω and ø. HADES is a second generation experiment operating at GSI with the main aim to study in-medium modifications by means of dielectron production at the SIS18/Bevelac energy range. Large acceptance and excellent particle identification capabilities allows also for measurements of strangeness production. These abilities combined with the variety of beams provided by the SIS18 allow for a characterization of properties of the dense baryonic matter properties created in heavy ion collisions at these energies. A review of recent experimental results obtained by HADES is presented, with main emphasis on hadron properties in nuclear matter. 420 1 Conference code: 96468 Cited By :6

Published
2013

212. An upper limit on hypertriton production in collisions of Ar(1.76A GeV)+KCl

Author

Agakishiev, G., Belver, D., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, P., Castro, E., Chernenko, S., Destefanis, M., Dohrmann, F., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzon, J. A., Gernhäuser, R., Gilardi, C., Golubeva, M., Gonzalez-Diaz, D., Guber, F., Gumberidze, M., Heinz, T., Hennino, T., Holzmann, R., Iori, I., Ivashkin, A., Jurkovic, M., Kämpfer, B., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Kotte, R., Krasa, A., Krizek, F., Krücken, R., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Moriniere, E., Mousa, J., Müntz, C., Naumann, L., Pachmayer, Y. C., Palka, M., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Rehnisch, L., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Scheib, T., Schmah, A., Schuldes, H., Schwab, E., Siebenson, J., Sobolev, Y. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, H., Wagner, V., Weber, M., Wendisch, C., Wisniowski, M., Wüstenfeld, J., Yurevich, S., and Zanevsky, Y.

Abstract

A high-statistic data sample of Ar(1.76 AGeV)+KCl events recorded with HADES is used to search for a hypertriton signal. An upper production limit per centrality-triggered event of 1.04 x10-3 on the 3σ level is derived. Comparing this value with the number of successfully reconstructed Λ hyperons allows to determine an upper limit on the ratio N3HΛ/NΛ, which is confronted with statistical and coalescence-type model calculations.

Published
2013

213. Inclusive pion and η production in p+Nb collisions at 3.5 GeV beam energy

Author

Krücken, R., Agakishiev, G., Bałanda, A., Belver, D., Belyaev, A., Berger-Chen, J. C., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, Pablo, Chernenko, S., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gernhäuser, R., Göbel, K., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Heinz, T., Hennino, T., Holzmann, R., Ierusalimov, A., Iori, I., Ivashkin, A., Jurkovic, M., Kämpfer, B., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Kornakov, G., Kotte, R., Krása, Antonín, Krizek, F., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Ladygin, V., Lalik, R., Lang, S., Lapidus, K., Lebedev, A., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Müntz, C., Naumann, L., Pachmayer, Y. C., Palka, M., Parpottas, Yiannis, Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Y. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, Haralambos, Vasiliev, T., Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., Zanevsky, Y., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

Data on inclusive pion and η production measured with the dielectron spectrometer HADES in the reaction p+93Nb at a kinetic beam energy of 3.5 GeV are presented. Our results, obtained with the photon-conversion method, supplement the rather sparse information on neutral-meson production in proton-nucleus reactions existing for this bombarding energy regime. The reconstructed e+e-e+e- transverse-momentum and rapidity distributions are confronted with transport-model calculations, which account fairly well for both π0 and η production. © 2013 American Physical Society. 88 2 Cited By :8

Published
2013

214. Hades experiments: investigation of hadron in-medium properties

Author

Agakishiev, G., Behnke, C., Belver, D., Belyaev, A., Berger-Chen, J. C., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, P., Castro, E., Chernenko, S., Christ, T., Destefanis, M., Dohrmann, F., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzon, J. A., Gernhäuser, R., Gilardi, C., Golubeva, M., Gonzalez-Diaz, D., Guber, F., Gumberidze, M., Heinz, T., 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., Krasa, A., Krizek, F., Krücken, R., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Lalik, R., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Moriniere, E., Mousa, J., Müntz, C., Naumann, L., Otwinowski, J., Pachmayer, Y. C., Palka, M., Parpottas, Y., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Y. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, H., Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., and Zanevsky, Y.

Subjects
High Energy Physics::Phenomenology, Nuclear Theory, Nuclear Experiment
Abstract

Hadron modications in nuclear matter are discussed in connection to chiral symmetry restoration and/or hadronic many body eects. Experiments with photon, proton and heavy ion beams are used to probe properties of hadrons embedded in nuclear matter at different temperatures and densities. Most of the information has been gathered for the light vector mesons ρ, ω and φ. HADES is a second generation experiment operating at GSI with the main aim to study in-medium mass modication by means of dielectron production at SIS18/Bevelac energy range. Large acceptance and excellent particle identication capabilities allows also for measurement of strangeness production. These abilities combined with the variety of beams provided by the SIS18 allows for characterization of properties of the dense baryonic matter properties created in heavy ion collisions at these energies. A review of recent experimental results obtained by HADES is presented, with main emphasis on hadron properties in nuclear matter.

Published
2013

215. Proton induced dielectron radiation off Nb: Pt and Y distributions

Author

Lorenz, M., Weber, M., Agakishiev, G., Behnke, C., Belver, D., Belyaev, A., Berger-Chen, J. C., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, P., Castro, E., Chernenko, S., Christ, T., Destefanis, M., Dohrmann, F., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzon, J. A., Gernhäuser, R., Gilardi, C., Golubeva, M., Gonzalez-Diaz, D., Guber, F., Gumberidze, M., Heinz, T., 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., Krasa, A., Krizek, F., Krücken, R., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Lalik, R., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Moriniere, E., Mousa, J., Müntz, C., Naumann, L., Otwinowski, J., Pachmayer, Y. C., Palka, M., Parpottas, Y., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Y. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, H., Wagner, V., Wendisch, C., Wüstenfeld, J., Yurevich, S., and Zanevsky, Y.

Subjects
Nuclear Experiment
Abstract

Following our recent letter [1] on inclusive e+e− pair production in proton induced reactions at Ekin = 3.5 GeV on the nucleus Nb, we present here in addition the transverse and rapidity distributions for various e+e− invariant mass bins and compare them to reference data measured in p+p reactions.

Published
2013

216. Deep sub-threshold K∗(892)0 production in collisions of Ar+KCl at 1.76A GeV

Author

Agakishiev, G., Balanda, A., Bassini, R., Belver, D., Belyaev, A. V., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, P., Castro, E., Chernenko, S., Christ, T., Destefanis, M., Diaz, J., Dohrmann, F., Dybczak, A., Eberl, T., Epple, E., Fabbietti, L., Fateev, O. V., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzon, J. A., Gernhäuser, R., Gil, A., Gilardi, C., Golubeva, M., Gonzalez-Diaz, D., Guber, F., Gumberidze, M., Heilmann, M., Heinz, T., Hennino, T., Holzmann, R., Huck, P., Iori, I., Ivashkin, A., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Kirschner, D., Koenig, I., Koenig, W., Kolb, B. W., Kotte, R., Krizek, F., Krücken, R., Kühn, W., Kugler, A., Kurepin, A., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Mishra, D., Moriniere, E., Mousa, J., Müntz, C., Naumann, L., Otwinowski, J., Pachmayer, Y. C., Palka, M., Parpottas, Y., Pechenov, V., Pechenova, O., Perez Cavalcanti, T., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Roy-Stephan, M., Rustamov, A., Sadovsky, A., Sailer, B., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Y. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, H., Wagner, V., Weber, M., Wendisch, C., Wisniowski, M., Wojcik, T., Wüstenfeld, J., Yurevich, S., Zanevsky, Y. V., and Zumbruch, P.

Abstract

Results on the deep sub-threshold production of the short-lived hadronic resonance K^{*}(892)^{0} are reported for collisions of Ar\,+\,KCl at 1.76A~GeV beam energy, studied with the High Acceptance Di-Electron Spectrometer (HADES) at SIS18/GSI. The K^{*}(892)^{0} production probability per central collision of P_{K^{*0}}=(4.4 \pm 1.1 \pm 0.5)\times10^{-4} and the K^{*}(892)^{0}/K^{0} ratio of P_{\mbox{K}^{*0}}/P_{\mbox{K}^0}=(1.9 \pm 0.5 \pm 0.3)\times10^{-2} are determined at the lowest energy so far (sqrt{s_{NN}}-sqrt{s_{thr}}=-340~MeV). The K^{*0}/K^{0} ratio is compared with results of other experiments and with the predictions of the UrQMD transport approach and of the statistical hadronization model. The experimental K^{*0}/K^{0} ratio is in fair agreement with the results of the transport model. In a chemically equilibrated medium the ratio corresponds to a temperature of the thermalized system being systematically lower than the value determined by the yields of the stable and long-lived hadrons produced in Ar\,+\,KCl collisions. From the present measurement, we conclude that sub-threshold K^* production either can not be considered to proceed in a system being in thermal equilibrium or these short-lived resonances appear undersaturated, for example as a result of the rescattering of the decay particles in the ambient hadronic medium.

Published
2013

217. Inclusive pion and η production in p+Nb collisions at 3.5 GeV beam energy

Author

Agakishiev, G., Balanda, A., Belver, D., Belyaev, A., Berger Chen, J. C., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, P., Chernenko, S., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gernhäuser, R., Göbel, K., Golubeva, M., González Díaz, D., Guber, F., Gumberidze, M., Heinz, T., Hennino, T., Holzmann, R., Ierusalimov, A., Iori, I., Ivashkin, A., Jurkovic, M., Kämpfer, B., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Kornakov, G., Kotte, R., Krása, A., Krizek, F., Krücken, R., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Ladygin, V., Lalik, R., Lang, S., Lapidus, K., Lebedev, A., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Müntz, C., Naumann, L., Pachmayer, Y. C., Palka, M., Parpottas, Y., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Y. u. G., Spataro, STEFANO GIOVANNI, Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, H., Vasiliev, T., Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., and Zanevsky, Y.

Published
2013

218. Baryonic resonances close to the (K)over-barN threshold: The case of Lambda (1405) in pp collisions

Author

Agakishiev, G., Balanda, A., Belver, D., Belyaev, A., Berger Chen, J., Blanco, A., Böhmer, M., Boyard, J., Cabanelas, P., Castro, E., Chernenko, S., Christ, T., Destefanis, MARCO GIOVANNI, Dohrmann, F., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J., Gernhäuser, R., Gilardi, C., Golubeva, M., González Díaz, D., Guber, F., Gumberidze, M., Heinz, T., Hennino, T., Holzmann, R., Ierusalimov, A., Iori, I., Ivashkin, A., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kotte, R., Krása, A., Krizek, F., Krücken, R., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Lalik, R., Lang, S., Lange, J., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Morinière, E., Mousa, J., Müntz, C., Münzer, R., Naumann, L., Otwinowski, J., Pachmayer, Y., Palka, M., Parpottas, Y., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Y. u., Spataro, STEFANO GIOVANNI, Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, H., Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., and Zanevsky, Y.

Published
2013

219. PK +Λ final state: Towards the extraction of the p pK - contribution

Author

Fabbietti, L., Agakishiev, G., Behnke, C., Belver, D., Belyaev, A., Berger-Chen, J. C., Blanco, A., Blume, C., Böhmer, M., Cabanelas, Pablo, Chernenko, S., Dritsa, Christina, Dybczak, A., Epple, E., Fateev, O., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gill, K., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Harabasz, S., Hennino, T., Höhne, C., Holzmann, R., Huck, P., Ierusalimov, A., Ivashkin, A., Jurkovic, M., Kämpfer, B., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Korcyl, G., Kornakov, G., Kotte, R., Krása, Antonín, Krebs, E., Krizek, F., Kuc, H., Kugler, A., Kurepin, A., Kurilkin, A., Kurilkin, P., Ladygin, V., Lalik, R., Lang, S., Lapidus, K., Lebedev, A., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michel, J., Müntz, C., Münzer, R., Naumann, L., Palka, M., Parpottas, Yiannis, Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Rehnisch, L., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Scheib, T., Schuldes, H., Siebenson, J., Sobolev, Y., Spataro, S., Ströbele, H., Stroth, J., Strzempek, P., Sturm, C., Svoboda, O., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Tsertos, Haralambos, Vasiliev, T., Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., Zanevsky, Y., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Kaonic bound state, Meson-baryon interaction, Partial wave analysis, Λ(1405)
Abstract

The reaction p(3.5 GeV) + p → p + Λ + K + can be studied to search for the existence of kaonic bound states like p pK - leading to this final state. This effort has been motivated by the assumption that in p + p collisions the Λ(1405) resonance can act as a doorway to the formation of the kaonic bound states. The status of this analysis within the HADES Collaboration, with particular emphasis on the comparison to simulations, is shown in this work and the deviation method utilized by the DISTO Collaboration in a similar analysis is discussed. The outcome suggests the employment of a partial wave analysis do disentangle the different contributions to the measured pK +Λ final state. © 2013 Elsevier B.V. 914 60 68 Cited By :26

Published
2013

220. One and two-pion production in pp reactions with the high acceptance Di-electron spectrometer at GSI

Author

Ramstein, B., Agakishiev, G., Behnke, C., Belver, D., Belyaev, A., Berger-Chen, J. C., Blanco, A., Blume, C., Böhmer, M., Cabanelas, Pablo, Chernenko, S., Dritsa, Christina, Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gill, K., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Harabasz, S., Hennino, T., Holzmann, R., Huck, P., Höhne, C., Ierusalimov, A., Ivashkin, A., Jurkovic, M., Kämpfer, B., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Korcyl, G., Kornakov, G., Rotte, R., Krása, Antonín, Krebs, E., Krizek, F., Kozuch, A., Kuc, H., Kugler, A., Kurepin, A., Kurilkin, A., Kurilkin, P., Ladygin, V., Lalik, R., Lang, S., Lapidus, K., Lebedev, A., Lopes, L., Lorenz, M., Liu, T., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michel, J., Müntz, C., Münzet, R., Naumann, L., Palka, M., Parpottas, Yiannis, Perez-Cavalcanti, T., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Rehnisch, L., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Scheib, T., Schuldes, H., Siebenson, J., Sobolev, Yu G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Strzempek, P., Sturm, C., Svoboda, O., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Tsertos, Haralambos, Vasiliev, T., Wagner, V., Weber, M., Wendisch, C., Wisniowski, M., Wüstenfeld, J., Yurevich, S., Zanevsky, Y., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Lagrange multipliers, Spectrometers, Production channels, Invariant mass, Hadrons, Opening angle, Natural resources management, High acceptance di-electron spectrometers, Baryonic resonances, Spacecraft instruments, Differential cross-sections, High Energy Physics::Experiment, Nuclear reactions, Resonance model, Nuclear Experiment, Effective Lagrangian
Abstract

We present exclusive meaurements of the pp→pnπ+ and pp→ppπO reactions at 1.25 GeV, 2.2 GeV and 3.5 GeV and of the pp→ppπ+π- reaction at 1.25 GeV with the High Acceptance Di-Electron Spectrometer at GSI. Total and differential cross-sections for the one-pion production channels are analyzed with the resonance model to extract the differential baryonic resonance contributions. A comparison of the two-pion production channels to effective lagrangian model predictions is on-going. The two-pion invariant mass and opening angle distributions show sensitivity to the double Δ(1232) and N(1440) → Δπ decays. 541 546 Sponsors: Conference code: 103419

Published
2013

221. Di-pion and di-electron production in NN reactions with HADES at 1.25GeV incident beam energy

Author

Agakishiev, G., Behnke, C., Belver, D., Belyaev, A., Berger-Chen, J. C., Blanco, A., Blume, C., Böhmer, M., Cabanelas, Pablo, Chernenko, S., Dritsa, Christina, Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gill, K., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Harabasz, S., Hennino, T., Höhne, C., Holzmann, R., Huck, P., Ierusalimov, A., Ivashkin, A., Jurkovic, M., Kämpfer, B., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Korcyl, G., Kornakov, G., Kotte, R., Krása, Antonín, Krebs, E., Krizek, F., Kugler, A., Kurepin, A., Kurilkin, A., Kurilkin, P., Ladygin, V., Lalik, R., Lang, S., Lapidus, K., Lebedev, A., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michel, J., Müntz, C., Münzer, R., Naumann, L., Palka, M., Parpottas, Yiannis, Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Rehnisch, L., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Scheib, T., Schuldes, H., Siebenson, J., Sobolev, Yu G., Spataro, S., Ströbele, H., Stroth, J., Strzempek, P., Sturm, C., Svoboda, O., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Tsertos, Haralambos, Vasiliev, T., Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., Zanevsky, Y., Kuc, H., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Beam energies, Isospin, Nuclear physics, Incident beam energy, Pion production, Hadrons, Dilepton production, Dileptons
Abstract

Significant isospin effects are observed by the HADES collaboration in inclusive dilepton production channels in the pp and quasi free np experiments at 1.25 GeV kinetic beam energy. Triggered by this observation, analyses of several exclusive channels within either dilepton or pion production have been started to shed more light on the possible explanations. Furthermore, the exclusive π+π- production in np and pp collisions provide tests for a consistent description of double pion production in different isospin states, which is necessary to understand contributions of double δ(1232) and N*(1440) production. This is also important in the context of the recent results from the WASA collaboration on the ABC effect with reference to a d* dibaryon resonance in the isospin 0 channel. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence. Conference code: 100843

Published
2013

222. pK+��final state: towards the extraction of the ppK- contribution

Author

Fabbietti, L., Agakishiev, G., Balanda, A., Belver, D., Belyaev, A. V., Berger-Chen, J-C, Blanco, A., B��hmer, M., Boyard, J. L., Cabanelas, P., Castro, E., Chernenko, S., Christ, T., Destefanis, M., Dohrmann, F., Dybczak, A., Epple, E., Eberl, T., Fateev, O. V., Finocchiaro, P., Fonte, P., Friese, J., Fr��hlich, I., Galatyuk, T., Garzon, J. A., Gernh��user, R., Gilardi, C., Golubeva, M., Gonzalez-Diaz, D., Guber, F., Gumberidze, M., Heinz, T., Hennino, T., Holzmann, R., Iori, I., Ivashkin, A., Jurkovic, M., K��mpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Kotte, R., Krasa, A., Krizek, F., Kr��cken, R., Kuc, H., K��hn, W., Kugler, A., Kurepin, A., Lalik, R., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Moriniere, E., Mousa, J., M��ntz, C., Naumann, L., Otwinowski, J., Pachmayer, Y. C., Palka, M., Parpottas, Y., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Yu. G., Spataro, A. Solaguren-Beascoa Negre S., Spruck, B., Str��bele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, H., Wagner, V., Weber, M., Wendisch, C., W��stenfel, J., Yurevich, S., and Zanevsky, Y. V.

Subjects
FOS: Physical sciences, Nuclear Experiment (nucl-ex)
Abstract

The reaction p(@3.5\,GeV)+p -> p+��+ K^+ can be studied to search for the existence of kaonic bound states like ppK^- leading to this final state. This effort has been motivated by the assumption that in p+p collisions the ��(1405) resonance can act as a doorway to the formation of the kaonic bound states. The status of this analysis within the HADES collaboration, with particular emphasis on the comparison to simulations, is shown in this work and the deviation method utilized by the DISTO collaboration in a similar analysis is discussed. The outcome suggests the employment of a partial wave analysis to disentangle the different contributions to the measured pK^+��final state., 9 pages, 6 figures, proceeding of the HYP2012 conference Nucl. Phys. A (2013)

Published
2013
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223. Proton induced dielectron radiation off Nb: Pt and Y distributions

Author

Lorenz, M., Weber, M., Agakishiev, G., Behnke, C., Belver, D., Belyaev, A., Berger-Chen, J. C., Blanco, A., Blume, C., Böhmer, M., Cabanelas, Pablo, Chernenko, S., Dritsa, Christina, Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gill, K., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Harabasz, S., Hennino, T., Holzmann, R., Huck, P., Hhne, C., Ierusalimov, A., Ivashkin, A., Jurkovic, M., Kämpfer, B., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Korcyl, G., Kornakov, G., Kotte, R., Krása, Antonín, Krebs, E., Krizek, F., Kuc, H., Kugler, A., Kurepin, A., Kurilkin, A., Kurilkin, P., Ladygin, V., Lalik, R., Lang, S., Lapidus, K., Lebedev, A., Lopes, L., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michel, J., Müntz, C., Münzer, R., Naumann, L., Palka, M., Parpottas, Yiannis, Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Rehnisch, L., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Scheib, T., Schuldes, H., Siebenson, J., Sobolev, Y. G., Spataro, S., Ströbele, H., Stroth, J., Strzempek, P., Sturm, C., Svoboda, O., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Tsertos, Haralambos, Vasiliev, T., Wagner, V., Wendisch, C., Wüstenfeld, J., Yurevich, S., Zanevsky, Y., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Pair production, History, Proton, Rapidity distribution, Niobium, chemistry.chemical_element, Radiation, Education, Nuclear physics, Reference data, medicine, Rapidity, Invariant mass, Nuclear Experiment, Physics, Computer Science Applications, ddc, Transverse plane, medicine.anatomical_structure, chemistry, Proton induced reaction, Protons, Atomic physics, Nucleus
Abstract

Submitted by Helmut Wolters (helmut@coimbra.lip.pt) on 2019-02-03T22:44:29Z No. of bitstreams: 2 1.pdf: 577739 bytes, checksum: c342abc1fd9a62a2fbeb3a4f1fedc0b4 (MD5) zip/1229112.zip: 555432 bytes, checksum: b1c1f08ce3a030e66d2d1b060251c1e5 (MD5) Made available in DSpace on 2019-02-03T22:44:29Z (GMT). No. of bitstreams: 2 1.pdf: 577739 bytes, checksum: c342abc1fd9a62a2fbeb3a4f1fedc0b4 (MD5) zip/1229112.zip: 555432 bytes, checksum: b1c1f08ce3a030e66d2d1b060251c1e5 (MD5) Previous issue date: 2013

Published
2012

224. EU Fiscal Stance Vulnerability: Are the Old Members the Gold Members?

Author

Dybczak, Kamil and Melecky, Martin

Subjects
Macroeconomic Shocks, Fiscal Stance, European Union, Panel Data Analysis, Pooled Structural Vector Autoregression Model, jel:H68, jel:E62, jel:E37
Abstract

This paper investigates the effect of aggregate shocks on the fiscal stance of the EU, and of its old (OMS) and new (NMS) member states over a business cycle. The fiscal stance is measured by the government deficit. To study the impact of aggregate shocks, we use impulse responses derived from a pooled structural vector autoregression model estimated on annual panel data. We find that the fiscal deficits of OMS could be vulnerable to discretionary changes in government expenditures and revenues. In contrast, the fiscal stance of NMS shows vulnerability to GDP shocks, because the increase in revenues after a positive GDP shock is often outpaced by greater expenditure increases in NMS. The estimated fiscal vulnerabilities stem from disproportionate policy responses concerning government expenditures and a lacking discipline to control pro-cyclical fiscal spending. Our findings for the EU thus support application of fiscal rules focused on government expenditure rather than other fiscal variables.

Published
2012

225. Baryonic resonances close to theK¯Nthreshold: The case ofΣ(1385)+inppcollisions

Author

T. Hennino, C. Gilardi, Jacek Tomasz Otwinowski, Marek Palka, A. Blanco, P. Fonte, A. Ivashkin, R. Kotte, B. Kämpfer, W. Kühn, L. Lopes, J. A. Garzón, I. Koenig, R. Krücken, Yu.V. Zanevsky, Tatiana Karavicheva, E. Schwab, M. Jurkovic, M. Gumberidze, Laura Fabbietti, D. Belver, A. Sadovsky, B. Ramstein, F. Dohrmann, R. Trebacz, V. Pechenov, Andrey Reshetin, Alexander Belyaev, C. Sturm, A.P. Ierusalimov, H. Kuc, A. Balanda, K. Teilab, J. S. Lange, R. H. Munzer, S. Spataro, I. Fröhlich, R. Holzmann, J. Markert, L. Naumann, M. Weber, H. Ströbele, B. Spruck, W. Koenig, Yvonne Chiara Pachmayer, A. Dybczak, T. Galatyuk, J. C. Berger-Chen, T. Christ, C. Wendisch, V. Wagner, Eliane Epple, Jehad Mousa, O. Pechenova, L. Maier, A. Krása, S. P. Chernenko, A. Rustamov, J. Michel, J. Pietraszko, M. Destefanis, T. Heinz, I. Iori, J. Wüstenfeld, J. Stroth, Yiannis Parpottas, Roman Gernhäuser, A. Kugler, S. Yurevich, E. Morinière, Yu. G. Sobolev, Alexey Kurepin, D. González-Díaz, P. Cabanelas, C. Müntz, Kalliopi Kanaki, H. Tsertos, V. Metag, O. V. Fateev, M. Traxler, M. Lorenz, R. Lalik, T. Liu, M.B. Golubeva, P. Tlusty, B. W. Kolb, Kirill Lapidus, J. Siebenson, A. M. Schmah, E. Castro, P. Salabura, Filip Krizek, S. Lang, J. L. Boyard, G. Agakishiev, Paolo Finocchiaro, J. Friese, B. Michalska, Witold Przygoda, F.F. Guber, M. Böhmer, A. Mangiarotti, and A. Tarantola

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Hyperon, Sigma, 01 natural sciences, Baryon, Angular distribution, 0103 physical sciences, Production (computer science), Invariant mass, Atomic physics, 010306 general physics, Beam energy, Bar (unit)
Abstract

We present results of an exclusive measurement of the first-excited state of the $\ensuremath{\Sigma}$ hyperon, $\ensuremath{\Sigma}{(1385)}^{+}$, produced in $p+p\ensuremath{\rightarrow}{\ensuremath{\Sigma}}^{+}+{K}^{+}+n$ at $3.5\phantom{\rule{0.28em}{0ex}}\mathrm{GeV}$ beam energy. The extracted data allow the detailed study of the invariant mass distribution of the $\ensuremath{\Sigma}{(1385)}^{+}$. The mass distribution is well described by a relativistic Breit-Wigner function with a maximum at ${m}_{0}=1383.2\ifmmode\pm\else\textpm\fi{}0.9\phantom{\rule{0.28em}{0ex}}\mathrm{MeV}/{c}^{2}$ and a width of $40.2\ifmmode\pm\else\textpm\fi{}2.1\phantom{\rule{0.28em}{0ex}}\mathrm{MeV}/{c}^{2}$. The exclusive production cross section comes out to be $22.27\ifmmode\pm\else\textpm\fi{}0.89\ifmmode\pm\else\textpm\fi{}1.{56}_{\ensuremath{-}2.10}^{+3.07}\phantom{\rule{0.28em}{0ex}}\ensuremath{\mu}b$. Angular distributions of the $\ensuremath{\Sigma}{(1385)}^{+}$ in different reference frames are found to be compatible with the hypothesis that $33%$ of $\ensuremath{\Sigma}{(1385)}^{+}$ result from the decay of an intermediate broad ${\ensuremath{\Delta}}^{++}$ excitation at about $2000\phantom{\rule{0.28em}{0ex}}\mathrm{MeV}/{c}^{2}$.

Published
2012

226. Production of σ ±π ∓pK + in p+p reactions at 3.5 GeV beam energy

Author

Krücken, R., Agakishiev, G., Bałanda, A., Belver, D., Belyaev, A., Berger-Chen, J. C., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, Pablo, Castro, E., Chernenko, S., Christ, T., Destefanis, M., Dohrmann, F., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gernhäuser, R., Gilardi, C., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Heinz, T., 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., Krása, Antonín, Krizek, F., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Lalik, R., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Morinière, E., Mousa, J., Müntz, C., Münzer, R., Naumann, L., Otwinowski, J., Pachmayer, Y. C., Palka, M., Parpottas, Yiannis, Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Y., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, Haralambos, Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., Zanevsky, Y., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
P+p collisions, Λ(1405)
Abstract

We study the production of σ ±π ∓ pK + particle quartets in p + p reactions at 3.5 GeV kinetic beam energy. The data were taken with the HADES experiment at GSI. This report evaluates the contribution of resonances like Λ(1405), σ(1385) 0, Λ(1520), δ(1232), N* and K *0 to the σ ±π ∓ pK + final state. The resulting simulation model is compared to the experimental data in several angular distributions and it shows itself as suitable to evaluate the acceptance corrections properly. © 2012 Elsevier B.V. 881 178 186 Cited By :13

Published
2012

227. Determination of the Σ(1385) 0/Λ(1405) ratio in p+p collisions at 3.5 GeV

Author

Krücken, R., Agakishiev, G., Bałanda, A., Belver, D., Belyaev, A. V., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, Pablo, Castro, E., Berger-Chen, J. C., Chernenko, S., Christ, T., Destefanis, M., Dohrmann, F., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O. V., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gernhäuser, R., Gilardi, C., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Heinz, T., 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., Krása, Antonín, Krizek, F., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Lalik, R., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Morinière, E., Mousa, J., Müntz, C., Naumann, L., Otwinowski, J., Pachmayer, Y. C., Palka, M., Parpottas, Yiannis, Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Y. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, Haralambos, Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., Zanevsky, Y. V., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Kaon-nucleon interaction, Sigma, Strangeness, Condensed Matter Physics, Lambda, 01 natural sciences, Atomic and Molecular Physics, and Optics, strangeness, Resonances, 0103 physical sciences, Production (computer science), Physical and Theoretical Chemistry, 010306 general physics, RESONANCES
Abstract

The aim of the present analysis is to determine the relative production cross sections of the $\Lambda$(1405) and $\Sigma(1385)^{0}$ resonances in p+p collisions at E$_{kin}$=3.5 GeV measured with HADES. Upper and lower limits have been determined for the ratio $\sigma_{(\Sigma(1385)^{0}+p+K^{+})}/\sigma_{(\Lambda(1405)+p+K^{+})}=0.76_{-0.26}^{+0.54}$. The knowledge of this ratio is an essential input for the analysis of the decay $\Lambda(1405)\rightarrow\Sigma^{\pm}\pi^{\mp}$, where an unambiguous separation of the $\Lambda$(1405) and $\Sigma(1385)^{0}$ signals is not possible.

Published
2012

228. Strange baryon resonances in pp collisions measured with HADES

Author

Siebenson, J., Agakishiev, G., Belver, D., Belyaev, A., Blanco, A., Böhmer, M., Cabanelas, P., Chernenko, S., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Hennino, T., Holzmann, R., Huck, P., Ierusalimov, A., Ivashkin, A., Jurkovic, M., Kämpfer, B., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Korcyl, G., Kornakov, G., Kotte, R., Kozuch, A., Krása, A., Krizek, F., Krücken, R., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Kurilkin, A., Kurilkin, P., Ladygin, V., Lang, S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Müntz, C., Naumann, L., Pachmayer, Y. C., Palka, M., Parpottas, Y., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Sobolev, Y. G., Spataro, S., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, H., Vasiliev, T., Wagner, V., Weber, M., Wüstenfeld, J., Yurevich, S., and Zanevsky, Y.

Abstract

We present an analysis of the hyperons Λ(1405) and Σ(1385)+ for p+p reactions at 3.5 GeV kinetic beam energy. The data were taken with the High Acceptance Di-Electron Spectrometer (HADES). A Λ(1405) signal could be reconstructed in both charged decay channels Λ(1405) → Σ±π∓. The obtained statistics of the Σ(1385)+ signal allows also differential studies.

Published
2012

229. Baryonic resonances close to the K[over ¯]N threshold: The case of Σ(1385)^{+} in pp collisions

Author

Agakishiev, G., Balanda, A., Belver, D., Belyaev, A., Berger Chen, J., Blanco, A., Böhmer, M., Boyard, J., Cabanelas, P., Castro, E., Chernenko, S., Christ, T., Destefanis, MARCO GIOVANNI, Dohrmann, F., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J., Gernhäuser, R., Gilardi, C., Golubeva, M., González Díaz, D., Guber, F., Gumberidze, M., Heinz, T., Hennino, T., Holzmann, R., Ierusalimov, A., Iori, I., Ivashkin, A., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B., Kotte, R., Krása, A., Krizek, F., Krücken, R., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Lalik, R., Lang, S., Lange, J., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Morinière, E., Mousa, J., Müntz, C., Naumann, L., Otwinowski, J., Pachmayer, Y., Palka, M., Parpottas, Y., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Y. u., Spataro, STEFANO GIOVANNI, Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, H., Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., and Zanevsky, Y.

Published
2012

230. New data on the differential cross section of the dp-elastic scattering at 2.5 GeV obtained with HADES detector

Author

Agakishiev, G., Behnke, C., Belver, D., Belyaev, A., Berger-Chen, J. C., Blanco, A., Blume, C., Böhmer, M., Cabanelas, Pablo, Chernenko, S., Dritsa, Christina, Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gill, K., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Harabasz, S., Hennino, T., Holzmann, R., Huck, P., Höhne, C., Ierusalimov, A., Ivashkin, A., Jurkovic, M., Kämpfer, B., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Korcyl, G., Kornakov, G., Kotte, R., Krása, Antonín, Krebs, E., Krizek, F., Kuc, H., Kugler, A., Kurepin, A., Kurilkin, A., Kurilkin, P., Ladygin, V., Lalik, R., Lang, S., Lapidus, K., Lebedev, A., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michel, J., Müntz, C., Münzer, R., Naumann, L., Palka, M., Parpottas, Yiannis, Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Rehnisch, L., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Scheib, T., Schuldes, H., Siebenson, J., Sobolev, Yu G., Spataro, S., Ströbele, H., Stroth, J., Strzempek, P., Sturm, C., Svoboda, O., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Tsertos, Haralambos, Vasiliev, T., Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., Zanevsky, Y., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Counting rules, Angular range, Nuclear Theory, Deuterium, Center of mass, Multiple scattering models, Relativity, Kinetics, New results, Scattering angles, High energy physics, Elastic scattering, Nuclear Experiment, Differential cross section, Kinetic energy, Wave functions
Abstract

New results on the differential cross section in deuteron-proton elastic scattering are obtained at the deuteron kinetic energy of 2.5 GeV with the HADES spectrometer. The angular range of 69°-125° in the center of mass system is covered. The obtained results are compared with the relativistic multiple scattering model calculation using the CD-Bonn deuteron wave function. The data at fixed scattering angles in the c.m. are in qualitative agreement with the constituent counting rules prediction. 2012-January Sponsors: Conference code: 117673

Published
2012

231. Double pion production in np and pp collisions at 1.25 GeV with HADES

Author

Agakishiev, G., Behnke, C., Belver, D., Belyaev, A., C. Berger-Chen, J., Blanco, A., Blume, C., Böhmer, M., Cabanelas, Pablo, Chernenko, S., Dritsa, Christina, Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gill, K., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Harabasz, S., Hennino, T., Holzmann, R., Huck, P., Höhne, C., Ierusalimov, A., Ivashkin, A., Jurkovic, M., Kämpfer, B., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Korcyl, G., Kornakov, G., Kotte, R., Krása, Antonín, Krebs, E., Krizek, F., Kuc, H., Kugler, A., Kurepin, A., Kurilkin, A., Kurilkin, P., Ladygin, V., Lalik, R., Lang, S., Lapidus, K., Lebedev, A., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michel, J., Müntz, C., Münzer, R., Naumann, L., Palka, M., Parpottas, Yiannis, Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Rehnisch, L., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Scheib, T., Schuldes, H., Siebenson, J., Sobolev, Yu G., Spataro, S., Ströbele, H., Stroth, J., Strzempek, P., Sturm, C., Svoboda, O., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Tsertos, Haralambos, Vasiliev, T., Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., Zanevsky, Y., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Phase space methods, Elementary particles, Incident beam energy, Pion production, High energy physics, Hadrons, Phase space distributions, Nuclear Experiment
Abstract

The results of double pion production in np and pp collisions at an incident beam energy of 1.25 GeV with the HADES spectrometer at GSI are presented. The np-reactions were studied in d p collisions at 1.25 GeV/u using Forward Wall hodoscope aimed at registering spectator protons. High statistic invariantmass and angular distributions are obtained within the HADES acceptance which are compared with phase-space distributions. 2012-January Sponsors: Conference code: 117673

Published
2012

232. Baryonic resonances close to the K̄N threshold: The case of Σ(1385)+ in pp collisions

Author

Krücken, R., Agakishiev, G., Bałanda, A., Belver, D., Belyaev, A., Berger-Chen, J. C., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, Pablo, Castro, E., Chernenko, S., Christ, T., Destefanis, M., Dohrmann, F., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O. V., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gernhäuser, R., Gilardi, C., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Heinz, T., 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., Krása, Antonín, Krizek, F., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Lalik, R., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Morinière, E., Mousa, J., Müntz, C., Naumann, L., Otwinowski, J., Pachmayer, Y. C., Palka, M., Parpottas, Yiannis, Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Y. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, Haralambos, Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., Zanevsky, Y., and Tsertos, Haralambos [0000-0001-5966-343X]

Abstract

We present results of an exclusive measurement of the first-excited state of the Σ hyperon, Σ(1385)+, produced in p+p→Σ++K++n at 3.5GeV beam energy. The extracted data allow the detailed study of the invariant mass distribution of the Σ(1385)+. The mass distribution is well described by a relativistic Breit-Wigner function with a maximum at m 0=1383.2±0.9MeV/c2 and a width of 40.2±2.1MeV/c2. The exclusive production cross section comes out to be 22.27±0.89±1. 56-2.10+3.07μb. Angular distributions of the Σ(1385 )+ in different reference frames are found to be compatible with the hypothesis that 33% of Σ(1385 )+ result from the decay of an intermediate broad Δ++ excitation at about 2000MeV/c2. © 2012 American Physical Society. 85 3 Cited By :34

Published
2012

233. Production of Σ±π∓pK+ in p+p reactions at 3.5 GeV beam energy

Author

Agakishiev, G., Balanda, A., Belver, D., Belyaev, A., Berger Chen, J. C., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, P., Castro, E., Chernenko, S., Christ, T., Destefanis, MARCO GIOVANNI, Dohrmann, F., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gernhäuser, R., Gilardi, C., Golubeva, M., González Díaz, D., Guber, F., Gumberidze, M., Heinz, T., 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., Krása, A., Krizek, F., Krücken, R., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Lalik, R., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Morinière, E., Mousa, J., Müntz, C., Münzer, R., Naumann, L., Otwinowski, J., Pachmayer, Y. C., Palka, M., Parpottas, Y., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Y. u. G., Spataro, STEFANO GIOVANNI, Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, H., Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., and Zanevsky, Y.

Published
2012

234. One and two pion production in pp reactions with High Acceptance Di-Electron Spectrometer at GSI

Author

Ramstein, B, Agakishiev, G, Behnke, C, Belver, D, Belyaev, A, Berger-Chen, J C, Blanco, A, Blume, C, Böhmer, M, Cabanelas, P, Chernenko, S, Dritsa, C, Dybczak, A, Epple, E, Fabbietti, L, Fateev, O, Fonte, P, Friese, J, Fröhlich, I, Galatyuk, T, Garzón, J A, Gill, K, Golubeva, M, González-Díaz, D, Guber, F, Gumberidze, M, Harabasz, S, Hennino, T, Holzmann, R, Huck, P, Höhne, C, Ierusalimov, A, Ivashkin, A, Jurkovic, M, Kämpfer, B, Karavicheva, T, Koenig, I, Koenig, W, Kolb, B W, Korcyl, G, Kornakov, G, Kotte, R, Krása, A, Krebs, E, Krizek, F, Kozuch, A, Kuc, H, Kugler, A, Kurepin, A, Kurilkin, A, Kurilkin, P, Ladygin, V, Lalik, R, Lang, S, Lapidus, K, Lebedev, A, Lopes, L, Lorenz, M, Liu, T, Maier, L, Mangiarotti, A, Markert, J, Metag, V, Michel, J, Müntz, C, Münzer, R, Naumann, L, Palka, M, Parpottas, Y, Perez-Cavalcanti, T, Pechenov, V, Pechenova, O, Pietraszko, J, Przygoda, W, Rehnisch, L, Reshetin, A, Rustamov, A, Sadovsky, A, Salabura, P, Scheib, T, Schuldes, H, Siebenson, J, Sobolev, Yu G, Spataroe, S, Spruck, B, Ströbele, H, Stroth, J, Strzempek, P, Sturm, C, Svoboda, O, Tarantola, A, Teilab, K, Tlusty, P, Traxler, M, Tsertos, H, Vasiliev, T, Wagner, V, Weber, M, Wendisch, C, Wisniowski, M, Wüstenfeld, J, Yurevich, S, and Zanevsky, Y

Subjects
Nuclear Physics - Experiment
Published
2012

235. First measurement of proton-induced low-momentum dielectron radiation off cold nuclear matter

Author

Agakishiev, G., Balanda, A., Belver, D., Belyaev, A., Berger-Chen, J. C., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, P., Castro, E., Chernenko, S., Christ, T., Destefanis, M., Dohrmann, F., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzon, J. A., Gernhäuser, R., Gilardi, C., Golubeva, M., Gonzalez-Diaz, D., Guber, F., Gumberidze, M., Heinz, T., 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., Krasa, A., Krizek, F., Krücken, R., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Lalik, R., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Moriniere, E., Mousa, J., Müntz, C., Naumann, L., Otwinowski, J., Pachmayer, Y. C., Palka, M., Parpottas, Y., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Y. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, H., Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., and Zanevsky, Y.

Subjects
Nuclear Experiment
Abstract

We present data on dielectron emission in proton induced reactions on a Nb target at 3.5 GeV kinetic beam energy measured with HADES installed at GSI. The data represent the first high statistics measurement of dielectrons radiated from cold nuclear matter in a kinematic regime, where strong medium effects are expected. Combined with the good mass resolution of 2\%, it is the first measurement sensitive to changes of the spectral functions of vector mesons, as predicted by models for hadrons at rest or small relative momenta. Comparing the e^+e^- invariant mass spectra to elementary p+p data, we observe for e^+e^- momenta P_{ee}

Published
2012

236. Baryonic resonances close to the Kbar N threshold: the case of Λ(1405) in pp collisions

Author

Agakishiev, G., Balanda, A., Belver, D., Belyaev, A., Berger-Chen, J. C., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, P., Chernenko, S., Dybczak, A., Epple, E., Fabbietti, L., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzon, J. A., Gernhäuser, R., Göbel, K., Golubeva, M., Gonzalez-Diaz, D., Guber, F., Gumberidze, M., Heinz, T., Hennino, T., Holzmann, R., Ierusalimov, A., Iori, I., Ivashkin, A., Jurkovic, M., Kämpfer, B., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Kornakov, G., Kotte, R., Krasa, A., Krizek, F., Krücken, R., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Ladygin, V., Lalik, R., Lang, S., Lapidus, K., Lebedev, A., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Müntz, C., Naumann, L., Pachmayer, Y. C., Palka, M., Parpottas, Y., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, H., Vasiliev, T., Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., and Zanevsky, Y.

Abstract

We present an analysis of the Λ(1405) hyperon produced in p+p collisions at 3.5GeV kinetic beam energy measured with HADES at GSI. The two charged decay channels Λ(1405)->Σ±π∓ have been reconstructed for the first time in p+p collisions. The efficiency and acceptance-corrected spectral shapes show a peak position clearly below 1390MeV/c2 and a total production cross section of σΛ(1405)=9.2±0.9±0.7+3.3−1.0 μb has been extracted. The analysis of its polar angle distribution suggests that the Λ(1405) is produced isotropically in the p-p center of mass system.

Published
2012

237. Inclusive dielectron spectra in p+p collisions at 3.5 GeV kinetic beam energy

Author

Krücken, R., Agakishiev, G., Bałanda, A., Belver, D., Belyaev, A., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, Pablo, Castro, E., Chen, J. C., Chernenko, S., Christ, T., Destefanis, M., Dohrmann, F., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gernhäuser, R., Gilardi, C., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Heinz, T., 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., Krása, Antonín, Krizek, F., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Lalik, R., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Morinière, E., Mousa, J., Müntz, C., Naumann, L., Otwinowski, J., Pachmayer, Y. C., Palka, M., Parpottas, Yiannis, Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Y. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, Haralambos, Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., Zanevsky, Y., 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
DYNAMICS, Particle physics, Nuclear and High Energy Physics, Meson, MESON PRODUCTION, SIS ENERGIES, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], HEAVY-ION COLLISIONS, Kinetic energy, 01 natural sciences, 7. Clean energy, Upper and lower bounds, DECAYS, 0103 physical sciences, Rapidity, Vector meson, 010306 general physics, Nuclear Experiment, Physics, PROTON-NUCLEUS, ELECTROMAGNETIC FORM-FACTORS, 010308 nuclear & particles physics, Branching fraction, INTERMEDIATE-ENERGY, DILEPTON PRODUCTION, nucleus-nucleus collisions, Production (computer science), High Energy Physics::Experiment, Energy (signal processing)
Abstract

We present the inclusive invariant mass, transverse momentum and rapidity distributions of dielectrons (e+e- pairs) in p+p interactions at 3. 5GeV beam kinetic energy. In the vector meson mass region, a distinct peak corresponding to direct ω decays is reconstructed with a 2% mass resolution. The data is compared to predictions from three model calculations. Due to the large acceptance of the HADES apparatus for e+e- invariant masses above 0. 2 GeV/c2 and for transverse pair momenta pt < 1 GeV/c, acceptance corrections are, to a large extent, model independent. This allows us to extract from dielectron data for the first time at this energy the inclusive production cross-sections for light vector mesons. Inclusive production cross-sections for π0 and η mesons are also reported. The obtained results will serve as an important reference for the study of vector meson production in proton-nucleus and heavy-ion collisions. Furthermore, using this data, an improved value for the upper bound of the branching ratio for direct η decays into the electron-positron channel is obtained. © 2012 The Author(s). 48 5 1 11 Cited By :9

Published
2012

238. Resonance production in p+p, p+A and A+A collisions measured with HADES

Author

Lorenz, M., Agakishiev, G., Behnke, C., Belver, D., Belyaev, A., Berger-Chen, J. C., Blanco, A., Blume, C., Böhmer, M., Cabanelas, Pablo, Dritsa, Christina, Dybczak, A., Epple, E., Fabbietti, L., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gill, K., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Harabasz, S., Hennino, T., Holzmann, R., Huck, P., Höhne, C., Ierusalimov, A., Ivashkin, A., Jurkovic, M., Kämpfer, B., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Korcyl, G., Kornakov, G., Kotte, R., Krása, Antonín, Krebs, E., Krizek, F., Kuc, H., Kugler, A., Kurepin, A., Kurilkin, A., Kurilkin, P., Ladygin, V., Lalik, R., Lang, S., Lapidus, K., Lebedev, A., Lopes, L., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michel, J., Müntz, C., Münzer, R., Naumann, L., Palka, M., Parpottas, Yiannis, Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Rehnisch, L., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Scheib, T., Schuldes, H., Siebenson, J., Sobolev, Yu G., Spataro, S., Ströbele, H., Stroth, J., Strzempek, P., Sturm, C., Svoboda, O., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Tsertos, Haralambos, Vasiliev, T., Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., Zanevsky, Y., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Nuclear physics, Baryon, Physics, Particle physics, Meson, QC1-999, Nuclear Theory, Strangeness production, High Energy Physics::Experiment, Nuclear matter, Nuclear Experiment, Resonance (particle physics)
Abstract

The knowledge of baryonic resonance properties and production cross sections plays an important role for the extraction and understanding of medium modifications of mesons in hot and/or dense nuclear matter. We present and discuss systematics on dielectron and strangeness production obtained with HADES on p+p, p+A and A+A collisions in the few GeV energy regime with respect to these resonances. © Owned by the authors 2012. 36

Published
2012

239. Determination of the $\Sigma (1385)^{0}/\Lambda$ (1405) ratio in p+p collisions at 3.5 GeV

Author

Agakishiev, G., Bałanda, Andrzej, Belver, D., Belyaev, A. V., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, P., Castro, E., Berger-Chen, J. C., Chernenko, S., Christ, T., Destefanis, M., Dohrmann, F., Dybczak, Adrian, Epple, E., Fabbietti, L., Fateev, O. V., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gernhäuser, R., Gilardi, C., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Heinz, T., 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., Krása, A., Krizek, F., Krücken, R., Kuc, Hubert, Kühn, W., Kugler, A., Kurepin, A., Lalik, R., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, Beata, Michel, J., Morinière, E., Mousa, J., Müntz, C., Naumann, L., Otwinowski, Jacek, Pachmayer, Y. C., Pałka, Marek, Parpottas, Y., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, Witold, Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, Piotr, Schmah, A., Schwab, E., Siebenson, J., Sobolev, Yu. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trębacz, Radosław, Tsertos, H., Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., and Zanevsky, Y. V.

Subjects
strangeness, resonances, kaon-nucleon interaction
Published
2012

240. The HADES-at-FAIR Project

Author

Hutsch, J., Krücken, R., Lapidus, K., Agakishiev, G., Bałanda, A., Bassini, R., Behnke, C., Belyaev, A., Blanco, A., Böhmer, M., Cabanelas, Pablo, Carolino, N., Chen, J. C., Chernenko, S., Diáz, J., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gernhäuser, R., Gil, A., Göbel, K., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Harabasz, S., Heidel, K., Heinz, T., Hennino, T., Holzmann, R., Huck, P., Ierusalimov, A., Iori, I., Ivashkin, A., Jurkovic, M., Kämpfer, B., Kajetanowicz, M., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Korcyl, G., Kornakov, G., Kotte, R., Kozuch, A., Krebs, E., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Kurilkin, A., Kurilkin, P., Ladygin, V., Lalik, R., Lange, J. S., Liu, M., Liu, T., Lopes, L., Lorenz, M., Lykasov, G., Maier, L., Malakhov, A., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Müntz, C., Münzer, R., Naumann, L., Palka, M., Parpottas, Yiannis, Pechenov, V., Pechenova, O., Pereira, A., Pietraszko, J., Przygoda, W., Ramstein, B., Rehnisch, C., Reshetin, A., Rosier, P., Rustamov, A., Sadovsky, A., Salabura, P., Scheib, T., Schmah, A., Schuldes, H., Schwab, E., Siebenson, J., Smolyankin, V., Sobiella, M., Sobolev, Y. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tiflov, V., Tlusty, P., Traxler, M., Trebacz, R., Troyan, A., Tsertos, Haralambos, Usenko, E., Vasiliev, T., Visotski, S., Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., Zanevsky, Y., 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
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, nucleus nucleus collisions, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Atomic and Molecular Physics, and Optics, Upgrade, 0103 physical sciences, Systems engineering, High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment
Abstract

After the completion of the experimental program at SIS18 the HADES setup will migrate to FAIR, where it will deliver high-quality data for heavy-ion collisions in an unexplored energy range of up to 8 A GeV. In this contribution, we briefly present the physics case, relevant detector characteristics and discuss the recently completed upgrade of HADES. © 2012 Pleiades Publishing, Ltd. 75 5 589 593 Cited By :6

Published
2012

241. Determination of the Σ(1385)0/Λ(1405) ratio in p+p collisions at 3.5 GeV

Author

E. Schwab, O. V. Fateev, M. Lorenz, A. Dybczak, S. P. Chernenko, Volker Metag, J. Michel, J. C. Berger-Chen, A.P. Ierusalimov, Michael Weber, M. Böhmer, Y. V. Zanevsky, A. Krása, A. Sadovsky, A. B. Kurepin, I. Iori, H. Kuc, V. Pechenov, C. Wendisch, M. B. Golubeva, A. Balanda, J. A. Garzón, Alexander Belyaev, S. Yurevich, R. Gernhäuser, J. S. Lange, Marek Palka, E. Castro, J. Friese, T. Christ, A. Rustamov, Burkhard Kampfer, E. Morinière, Yu. G. Sobolev, Fedor Guber, I. Koenig, Tatiana Karavicheva, D. González-Díaz, L. Fabbietti, Y. Parpottas, Wolfgang Kuhn, R. Holzmann, J. Markert, I. Fröhlich, Luis Lopes, A. Kugler, M. Jurkovic, V. Wagner, H. Ströbele, A. Mangiarotti, D. Belver, C. Gilardi, Jacek Tomasz Otwinowski, J. Pietraszko, Andrey Reshetin, C. Sturm, B. W. Kolb, T. Heinz, Witold Przygoda, P. Fonte, R. Trebacz, Yvonne Chiara Pachmayer, O. Pechenova, J. L. Boyard, T. Hennino, A. Ivashkin, R. Kotte, M. Traxler, C. Müntz, B. Spruck, G. Agakishiev, F. Krizek, E. Epple, F. Dohrmann, Piotr Salabura, Paolo Finocchiaro, S. Spataro, L. Naumann, Kalliopi Kanaki, P. Cabanelas, L. Maier, A. Tarantola, A. Blanco, Tetyana Galatyuk, B. Ramstein, W. Koenig, Joachim Stroth, R. Krücken, Jehad Mousa, M. Gumberidze, J. Siebenson, M. Destefanis, H. Tsertos, P. Tlusty, Kirill Lapidus, J. Wüstenfeld, R. Lalik, K. Teilab, T. Liu, A. M. Schmah, S. Lang, and B. Michalska

Subjects
Physics, Sigma, Production (computer science), Atomic physics, Lambda
Abstract

The aim of the present analysis is to determine the relative production cross sections of the Λ(1405) and Σ(1385)0 resonances in p+p collisions at Ekin = 3.5 GeV measured with HADES. Upper and lower limits have been determined for the ratio \(\sigma_{(\Sigma(1385)^{0}+p+K^{+})}/\sigma_{(\Lambda(1405)+p+K^{+})}=0.76_{-0.26}^{+0.54}\). The knowledge of this ratio is an essential input for the analysis of the decay Λ(1405)→Σ± π ∓ , where an unambiguous separation of the Λ(1405) and Σ(1385)0 signals is not possible.

Published
2012

242. Baryonic resonances close to the Kbar-N threshold: the case of Sigma(1385)^+ in pp collisions

Author

Agakishiev, G., Balanda, A., Belver, D., Belyaev, A. V., Blanco, A., Boehmer, M., Boyard, J. L., Cabanelas, P., Castro, E., Chen, J. C., Chernenko, S., Christ, T., Destefanis, M., Dohrmann, F., Dybczak, A., Epple, E., Eberl, T., Fabbietti, L., Fateev, O. V., Finocchiaro, P., Fonte, P., Friese, J., Froehlich, I., Galatyuk, T., Garzon, J. A., Gernhaeuser, R., Gilardi, C., Golubeva, M., Gonzalez-Diaz, D., Guber, F., Gumberidze, M., Heinz, T., Hennino, T., Holzmann, R., Iori, I., Ivashkin, A., Jurkovic, M., Kaempfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Kotte, R., Krasa, A., Krizek, F., Kruecken, R., Kuc, H., Kuehn, W., Kugler, A., Kurepin, A., Lalik, R., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Moriniere, E., Mousa, J., Muentz, C., Naumann, L., Otwinowski, J., Pachmayer, Y. C., Palka, M., Parpottas, Y., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Yu. G., Spataro, S., Spruck, B., Stroebele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, H., Wagner, V., Weber, M., Wendisch, C., Wuestenfeld, J., Yurevich, S., Zanevsky, Y. V., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and HADES

Subjects
FOS: Physical sciences, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

We present results of an exclusive measurement of the first excited state of the Sigma hyperon, Sigma(1385)^+, produced in p+p -> Sigma^+ + K^+ + n at 3.5 GeV beam energy. The extracted data allow to study in detail the invariant mass distribution of the Sigma(1385)^+. The mass distribution is well described by a relativistic Breit-Wigner function with a maximum at m_0 = 1383.2 +- 0.9 MeV/c^2 and a width of 40.2 +- 2.1 MeV/c^2. The exclusive production cross-section comes out to be 22.27 +- 0.89 +- 1.56 +3.07 -2.10 mu b. Angular distributions of the Sigma(1385)^+ in different reference frames are found to be compatible with the hypothesis that 33 % of Sigma(1385)^+ result from the decay of an intermediate Delta^{++} resonance., 12 pages; 12 figures; submitted to PRC

Published
2012

243. Production of $\Sigma ^{\pm }\pi ^{\mp }pK^{+}$ in reactions at 3.5 GeV beam energy

Author

Agakishiev, G., Bałanda, Andrzej, Belver, D., Belyaev, A., Berger-Chen, J. C., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, P., Castro, E., Chernenko, S., Christ, T., Destefanis, M., Dohrmann, F., Dybczak, Adrian, Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gernhäuser, R., Gilardi, C., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Heinz, T., 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., Krása, A., Krizek, F., Krücken, R., Kuc, Hubert, Kühn, W., Kugler, A., Kurepin, A., Lalik, R., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, Beata, Michel, J., Morinière, E., Mousa, J., Müntz, C., Münzer, R., Naumann, L., Otwinowski, Jacek, Pachmayer, Y. C., Pałka, Marek, Parpottas, Y., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, Witold, Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, Piotr, Schmah, A., Schwab, E., Siebenson, J., Sobolev, Yu. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trębacz, Radosław, Tsertos, H., Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., and Zanevsky, Y.

Published
2012

244. Baryonic resonances close to the Kbar N threshold: the case of Σ(1385)+ in pp collisions

Author

Agakishiev, G., Balanda, A., Belver, D., Belyaev, A., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, P., Castro, E., Chen, J. C., Chernenko, S., Christ, T., Destefanis, M., Dohrmann, F., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzon, J. A., Gernhäuser, R., Gilardi, C., Golubeva, M., Gonzalez-Diaz, D., Guber, F., Gumberidze, M., Heinz, T., Hennino, T., Holzmann, R., Iori, I., Ivashkin, A., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Kotte, R., Krasa, A., Krizek, F., Krücken, R., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Lalik, R., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Moriniere, E., Mousa, J., Müntz, C., Naumann, L., Otwinowski, J., Pachmayer, Y. C., Palka, M., Parpottas, Y., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Y. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, H., Wagner, V., Weber, M., Wendisch, C., Wüstenfeld, J., Yurevich, S., and Zanevsky, Y.

Subjects
TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY
Abstract

We present results of an exclusive measurement of the first excited state of the Σ hyperon, Σ(1385)+, produced in p+p->Σ++K++n at 3.5 GeV beam energy. The extracted data allow to study in detail the invariant mass distribution of the Σ(1385)+. The mass distribution is well described by a relativistic Breit-Wigner function with a maximum at m0=1383.2±0.9 MeV/c2 and a width of 40.2±2.1 MeV/c2. The exclusive production cross-section comes out to be 22.27±0.89±1.56+3.07−2.10 μb. Angular distributions of the Σ(1385)+ in different reference frames are found to be compatible with the hypothesis that 33% of Σ(1385)+ result from the decay of an intermediate Δ++ resonance.

Published
2012

245. Determination of the Σ(1385)0/Λ(1405) ratio in p+p collisions at 3.5 GeV

Author

Epple, E., Fabbietti, L., Agakishiev, G., Belver, D., Belyaev, A., Blanco, A., Böhmer, M., Cabanelas, P., Chernenko, S., Dybczak, A., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Hennino, T., Holzmann, R., Huck, P., Ierusalimov, A., Ivashkin, A., Jurkovic, M., Kämpfer, B., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Korcyl, G., Kornakov, G., Kotte, R., Kozuch, A., Krása, A., Krizek, F., Krücken, R., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Kurilkin, A., Kurilkin, P., Ladygin, V., Lang, S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Müntz, C., Naumann, L., Pachmayer, Y. C., Palka, M., Parpottas, Y., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Siebenson, J., Sobolev, Y. G., Spataro, S., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, H., Vasiliev, T., Wagner, V., Weber, M., Wüstenfeld, J., Yurevich, S., and Zanevsky, Y.

Subjects
TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY
Abstract

The aim of the present analysis is to determine the relative production cross sections of the Λ(1405) and Σ(1385)0 resonances in p+p collisions at Ekin = 3.5 GeV measured with HADES. Upper and lower limits have been determined for the ratio (Σ(1385)0+p+K+)(Λ(1405)+p+K+)=0.76+0.54−0.26. The knowledge of this ratio is an essential input for the analysis of the decay Λ(1405)→Σ±π∓ , where an unambiguous separation of the Λ(1405) and Σ(1385)0 signals is not possible.

Published
2012

246. Probing properties of nuclear matter with HADES

Author

Yu.V. Zanevsky, S. P. Chernenko, J. Michel, T. A. Vasiliev, A. Sadovsky, J. Wüstenfeld, J. Friese, A.P. Ierusalimov, A. Dybczak, H. Kuc, B. Kämpfer, L. Naumann, M. Weber, A. Balanda, T. Galatyuk, R. Holzmann, J. Markert, A. Rustamov, A. Krása, Andrey Reshetin, M. Gumberidze, J. Stroth, L. Maier, Marek Palka, P. Cabanelas, A. Tarantola, O. V. Fateev, A. Kugler, K. Teilab, V. Pechenov, B. Michalska, J. Lamas-Valverde, A. K. Kurilkin, J. Siebenson, B. W. Kolb, W. Kühn, Yvonne Chiara Pachmayer, T. Liu, S. Yurevich, P. Tlusty, Kirill Lapidus, Tatiana Karavicheva, G. Agakishiev, R. Krücken, Grzegorz Korcyl, D. Belver, I. Koenig, A. Kozuch, V. Metag, A. M. Schmah, O. Pechenova, Paolo Finocchiaro, H. Tsertos, M. Lorenz, Witold Przygoda, L. Lopes, B. Ramstein, F.F. Guber, H. Ströbele, P. K. Kählitz, S. Lang, W. Koenig, M. Böhmer, A. Mangiarotti, Laura Fabbietti, V. Wagner, J. Roskoss, Ana M. Gil, J. Pietraszko, S. Spataro, I. Fröhlich, T. Hennino, Yiannis Parpottas, J. A. Garzón, Eliane Epple, M.B. Golubeva, Alexey Kurepin, D. González-Díaz, J. S. Díaz, M. Jurkovic, A. Blanco, P. Fonte, Yu. G. Sobolev, R. Trebacz, A. Ivashkin, R. Kotte, C. Müntz, Alexander Belyaev, M. Traxler, P. K. Kurilkin, Filip Krizek, E. Castro, P. Salabura, V. P. Ladygin, J. L. Boyard, G. Kornakov, C. Sturm, I. Iori, and P. Huck

Subjects
Physics, Nuclear physics, Particle physics, Nuclear matter
Abstract

G. Agakishiev6, A. Balanda3, D. Belver16, A. Belyaev6, A. Blanco2, M. Bohmer9, J. L. Boyard14, P. Cabanelas16, E. Castro16, S. Chernenko6, J. Diaz17, A. Dybczak3, E. Epple8, L. Fabbietti8, O. Fateev6, P. Finocchiaro1, P. Fonte2,b, J. Friese9, I. Frohlich7, T. Galatyuk7,c, J. A. Garzon16, A. Gil17, M. Golubeva12, D. Gonzalez-Diazd , F. Guber12, M. Gumberidze14, T. Hennino14, R. Holzmann4, P. Huck9, A. Ierusalimov6, I. Iori11, f , A. Ivashkin12, M. Jurkovic9, B. Kampfer5,e, T. Karavicheva12, I. Koenig4, W. Koenig4, B. W. Kolb4, G. Korcyl3, G. Kornakov16, R. Kotte5, A. Kozuch3,g, A. Krasa15, F. Krizek15, R. Krucken9, H. Kuc3,14, W. Kuhn10, A. Kugler15, A. Kurepin12, A. Kurilkin6, P. Kurilkin6, P. Kahlitz5, V. Ladygin6, J. Lamas-Valverde16, S. Lang4, K. Lapidus8, T. Liu14, L. Lopes2, M. Lorenz7, L. Maier9, A. Mangiarotti2, J. Markert7, V. Metag10, B. Michalska3, J. Michel7, C. Muntz7, L. Naumann5, Y. C. Pachmayer7, M. Palka7, Y. Parpottas13, V. Pechenov4, O. Pechenova7, J. Pietraszko7, W. Przygoda3, B. Ramstein14, A. Reshetin12, J. Roskoss10, A. Rustamov4, A. Sadovsky12, P. Salabura3, A. Schmaha, J. Siebenson8, Yu.G. Sobolev15, S. Spataroh, H. Strobele7, J. Stroth7,4, C. Sturm4, A. Tarantola7, K. Teilab7, P. Tlusty15, M. Traxler4, R. Trebacz3, H. Tsertos13, T. Vasiliev6, V. Wagner15, M. Weber9, J. Wustenfeld5, S. Yurevich4, Y. Zanevsky6 (HADES collaboration)

Published
2011

247. Macroeconomic Shocks and the Fiscal Stance within the EU: A Panel Regression Analysis

Author

Dybczak, Kamil and Melecky, Martin

Subjects
jel:H68, jel:E62, jel:E37, Macroeconomic shocks, Fiscal Stance, European Union, Panel Data Analysis, Structural Vector Autoregression Models
Abstract

The recent global financial crisis has had a diverse effect on countries’ fiscal stance, especially throughout the EU. This paper examines the impact of macroeconomic shocks, including those to government revenues and expenditures, on EU countries’ fiscal stance, on aggregate, and within the EU’s sub-regions as defined by the length of countries’ membership in the EU and their level of indebtedness. The fiscal stance is measured by means of the government deficit, and the impact of macroeconomic shocks is examined using impulse responses from a structural vector autoregression (SVAR) model estimated on annual panel data. The analyzed system of macroeconomic variables includes, government revenues and expenditures, GDP growth, CPI inflation, the interest rate, the terms of trade, and the real effective exchange rate. The paper discusses the policy implications and the challenges for the EU and its sub-regions concerning the fiscal policy setting and balanced fiscal stance.

Published
2011

248. Probing properties of nuclear matter with HADES

Author

Krücken, R., Pietraszko, J., Agakishiev, G., Bałanda, A., Belver, D., Belyaev, A., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, Pablo, Castro, E., Chernenko, S., Diáz, J., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gil, A., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Hennino, T., Holzmann, R., Huck, P., Ierusalimov, A., Iori, I., Ivashkin, A., Jurkovic, M., Kämpfer, B., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Korcyl, G., Kornakov, G., Kotte, R., Kozuch, A., Krása, Antonín, Krizek, F., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Kurilkin, A., Kurilkin, P., Kählitz, P., Ladygin, V., Lamas-Valverde, J., Lang, S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Müntz, C., Naumann, L., Pachmayer, Y. C., Palka, M., Parpottas, Yiannis, Pechenov, V., Pechenova, O., Przygoda, W., Ramstein, B., Reshetin, A., Roskoss, J., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Siebenson, J., Sobolev, Yu G., Spataro, S., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, Haralambos, Vasiliev, T., Wagner, V., Weber, M., Wüstenfeld, J., Yurevich, S., Zanevsky, Y., and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
High acceptance di-electron spectrometers, Strangeness production, Nuclear matters, Astrophysics, Heavy ions
Abstract

This paper presents a review of selected physics results obtained at GSI Helmholtzzentrum für Schwerionenforschung GmbH by HADES (High-Acceptance Di-Electron Spectrometer). The e+e- pair emission measured for proton and heavy-ion induced collisions is reported together with results on strangeness production. The future HADES activities at the planned FAIR facility are also discussed. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence. 2011-January Sponsors: Conference code: 114465

Published
2011

249. Inclusive e+e− pair production in p+p and p+Nb collisions at Ekin = 3.5 GeV

Author

Weber, M., Agakishiev, G., Belver, D., Belyaev, A., Blanco, A., Böhmer, M., Cabanelas, P., Chernenko, S., Dybczak, A., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzon, J. A., Golubeva, M., Gonzalez-Diaz, D., Guber, F., Gumberidze, M., Hennino, T., Holzmann, R., Huck, P., Ierusalimov, A., Ivashkin, A., Jurkovic, M., Kämpfer, B., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Korcyl, G., Kornakov, G., Kotte, R., Kozuch, A., Krasa, A., Krizek, F., Krücken, R., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Kurilkin, A., Kurilkin, P., Ladygin, V., Lang, S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Müntz, C., Naumann, L., Pachmayer, Y. C., Palka, M., Parpottas, Y., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Siebenson, J., Sobolev, Y. G., Spataro, S., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, H., Vasiliev, T., Wagner, V., Wüstenfeld, J., Yurevich, S., and Zanevsky, Y.

Subjects
Nuclear Experiment
Abstract

We report on recent data of e+e- pair emission in proton nucleus collisions at energies above the light vector meson production thresholds. Invariant mass distributions for the p+Nb system at Ekin = 3.5 GeV are compared to data from elementary p+p reactions at the same beam energy. We observe a constant π0/ω yield ratio for both systems but an excess in the mass region above the π0 mass. Furthermore we present here the normalization procedure that was applied to p+Nb collisions by measuring the production of negative pions in the HADES acceptance.

Published
2011

250. Dielectron production in Ar+KCl collisions at 1.76A GeV

Author

Krücken, R., Agakishiev, G., Bałanda, A., Belver, D., Belyaev, A., Blanco, A., Böhmer, M., Boyard, J. L., Cabanelas, Pablo, Castro, E., Chernenko, S., Christ, T., Destefanis, M., Dohrmann, F., Dybczak, A., Eberl, T., Epple, E., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Fröhlich, I., Galatyuk, T., Garzón, J. A., Gernhäuser, R., Gilardi, C., Golubeva, M., González-Díaz, D., Guber, F., Gumberidze, M., Heinz, T., Hennino, T., Holzmann, R., Huck, P., Iori, I., Ivashkin, A., Jurkovic, M., Kämpfer, B., Kanaki, K., Karavicheva, T., Koenig, I., Koenig, W., Kolb, B. W., Kotte, R., Krása, Antonín, Krizek, F., Kuc, H., Kühn, W., Kugler, A., Kurepin, A., Lang, S., Lange, J. S., Lapidus, K., Liu, T., Lopes, L., Lorenz, M., Maier, L., Mangiarotti, A., Markert, J., Metag, V., Michalska, B., Michel, J., Morinière, E., Mousa, J., Müntz, C., Naumann, L., Otwinowski, J., Pachmayer, Y. C., Palka, M., Pechenov, V., Pechenova, O., Pietraszko, J., Przygoda, W., Ramstein, B., Reshetin, A., Rustamov, A., Sadovsky, A., Sailer, B., Salabura, P., Schmah, A., Schwab, E., Siebenson, J., Sobolev, Y. G., Spataro, S., Spruck, B., Ströbele, H., Stroth, J., Sturm, C., Tarantola, A., Teilab, K., Tlusty, P., Traxler, M., Trebacz, R., Tsertos, Haralambos, Wagner, V., Weber, M., Wendisch, C., Wisniowski, M., Wüstenfeld, J., Yurevich, S., Zanevsky, Y., 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), Instituto de Fisica Corpuscular (IFIC), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Universitat de València (UV), HADES, and Tsertos, Haralambos [0000-0001-5966-343X]

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Particle physics, Meson, ta114, 010308 nuclear & particles physics, Hadron, Nuclear Theory, FOS: Physical sciences, Elementary particle, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, Baryon, Antimatter, 0103 physical sciences, Invariant mass, Nuclear Experiment (nucl-ex), 010306 general physics, Nucleon, Nuclear Experiment
Abstract

We present results on dielectron production in Ar+KCl collisions at 1.76A GeV. For the first time $\omega$ mesons could be reconstructed in a heavy-ion reaction at a bombarding energy which is well below the production threshold in free nucleon-nucleon collisions. The omega multiplicity has been extracted and compared to the yields of other particles, in particular of the phi meson. At intermediate e+e- invariant masses, we find a strong enhancement of the pair yield over a reference spectrum from elementary nucleon-nucleon reactions suggesting the onset of non-trivial effects of the nuclear medium. Transverse-mass spectra and angular distributions have been reconstructed in three invariant mass bins. In the former unexpectedly large slopes are found for high-mass pairs. The latter, in particular the helicity-angle distributions, are largely consistent with expectations for a pair cocktail dominated at intermediate masses by delta Dalitz decays., Comment: 16 pages, 14 figures, accepted for publication by Phys. Rev. C

Published
2011
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