Study of exclusive one-pion and one-eta production using hadron and dielectron channels in pp reactions at kinetic beam energies of 1.25 GeV and 2.2 GeV with HADES
Year: 2012
Type: article
Abstract: We present measurements of exclusive $\ensuremath \pi^{+,0}$ and $ \eta$ production in pp reactions at 1.25GeV and 2.2GeV beam kinetic energy in hadron and dielectron channels. In the case of $ \pi^{+}_{}$ and $ \pi^{0}_{}$ , high-statistics invariant-mass and angular distributions are obtained within the HADES acceptance as well as acceptance-corrected distributions, which are compared to a resonance model. The sensitivity of the data to the yield and production angular distribution of $ \Delta$ (1232) and higher-lying baryon resonances is shown, and an improved parameterization is proposed. The extracted cross-sections are of special interest in the case of pp $ \rightarrow$ pp $ \eta$ , since controversial data exist at 2.0GeV; we find $\ensuremath \sigma=0.142\pm0.022$ mb. Using the dielectron channels, the $ \pi^{0}_{}$ and $ \eta$ Dalitz decay signals are reconstructed with yields fully consistent with the hadronic channels. The electron invariant masses and acceptance-corrected helicity angle distributions are found in good agreement with model predictions.
Source: The European Physical Journal A
Authors: G. Agakishiev, H. Alvarez-Pol, A. Balanda, R. Bassini, M. Böhmer, H. Bokemeyer, J. L. Boyard, P. Cabanelas, S. Chernenko, T. Christ, M. Destefanis, F. Dohrmann, A. Dybczak, T. Eberl, L. Fabbietti, O. Fateev, P. Finocchiaro, J. Friese, I. Fröhlich, T. Galatyuk, J. A. Garzón, R. Gernhäuser, C. Gilardi, M. Golubeva, D. González-Dıaz, F. Guber, M. Gumberidze, T. Hennino, R. Holzmann, A. Ierusalimov, I. Iori, A. Ivashkin, M. Jurkovic, B. Kämpfer, K. Kanaki, T. Karavicheva, I. Koenig, W. Koenig, B. W. Kolb, R. Kotte, A. Kozuch, F. Krizek, W. Kühn, A. Kugler, A. Kurepin, S. Lang, K. Lapidus, T. Liu, L. Maier, J. Markert, V. Metag, B. Michalska, E. Morinière, J. Mousa, M. Münch, C. Müntz, L. Naumann, J. Otwinowski, Y. C. Pachmayer, V. Pechenov, O. Pechenova, T. Pérez Cavalcanti, J. Pietraszko, V. Pospısil, W. Przygoda, B. Ramstein, A. Reshetin, M. Roy-Stephan, A. Rustamov, A. Sadovsky, B. Sailer, P. Salabura, M. Sánchez, A. Schmah, E. Schwab, Yu. G. Sobolev, S. Spataro, B. Spruck, H. Ströbele, J. Stroth, C. Sturm, A. Tarantola, K. Teilab, P. Tlusty, A. Toia, M. Traxler, R. Trebacz, H. Tsertos, V. Wagner, M. Wisniowski, T. Wojcik, J. Wüstenfeld, S. Yurevich, Y. Zanevsky, P. Zumbruch
Institutions: Joint Institute for Nuclear Research, Universidade de Santiago de Compostela, Jagiellonian University, Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Technical University of Munich, GSI Helmholtz Centre for Heavy Ion Research, Université Paris-Sud, Centre National de la Recherche Scientifique, Institut National de Physique Nucléaire et de Physique des Particules, Justus-Liebig-Universität Gießen, Helmholtz-Zentrum Dresden-Rossendorf, Excellence Cluster Universe, Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud, Goethe University Frankfurt, Russian Academy of Sciences, Institute for Nuclear Research, Czech Academy of Sciences, Nuclear Physics Institute, University of Cyprus
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,990
Funders: Deutsche Forschungsgemeinschaft, Bundesministerium für Bildung und Forschung, Centre National de la Recherche Scientifique, Emberi Eroforrások Minisztériuma, Helmholtz International Center for FAIR, Helmholtz-Zentrum Dresden-Rossendorf, Institut National de Physique Nucléaire et de Physique des Particules
OpenAlex ID: W2018494926