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

Geydar Agakishiev, Héctor Álvarez-Pol, Andrzej Balanda, Roberto Bassini, Michael Böhmer, Helmut Bokemeyer, Jean-Louis Boyard, Pablo Cabanelas Eiras, Sergey Chernenko, Tassilo Christ, Marco Giovanni Maria Destefanis, Frank Dohrmann, Adrian Dybczak, Thomas Eberl, Laura Fabbietti, Oleg Fateev, Paolo Finocchiaro, Jürgen Friese, Ingo Fröhlich, Tetyana Galatyuk, Juan A. Garzón, Roman Gernhäuser, Camilla Gilardi, Marina Golubeva, Diégo González-Díaz, Fedor Guber, Malgorzata Gumberidze, Thierry Hennino, Romain Holzmann, Alexander P. Ierusalimov, Ileana Iori, Alexander Ivashkin, Martin Jurkovič, Burkhard Kämpfer, Kalliopi Kanaki, Tatiana L. Karavicheva, Ilse Koenig, Wolfgang Koenig, Burkhard W. Kolb, Roland Kotte, Anna Kozuch, Filip Krizek, Wolfgang Kühn, Andrej Kugler, Alexei Kurepin, Simon Martin Lang, Kirill Lapidus, Tong Liu, Ludwig W. Maier, Jochen Markert, Volker Metag, Beata Michalska, Emilie Morinière, Jehad Mousa, Mathias Münch, Christian Müntz, Lothar Naumann, Jacek Tomasz Otwinowski, Yvonne C. Pachmayer, Vladimir Pechenov, Olga Pechenova, Tiago Pérez Cavalcanti, Jerzy Pietraszko, Vladimir Pospısil, Witold Przygoda, Béatrice Ramstein, Andrey Reshetin, M. Roy-Stephan, Anar Rustamov, Alexander Sadovsky, Benjamin Sailer, Piotr Salabura, M. Sánchez, Alexander Schmah, Erwin Schwab, Yuri G. Sobolev, Stefano Spataro, Björn Spruck, Herbert Ströbele, Joachim Stroth, Christian Thomas Sturm, Attilio Tarantola Peloni, Khaled Teilab, Pavel Tlustý, Alberica Toia, Michael Traxler, Radoslaw Trebacz, Haralabos Tsertos, Vladimir Wagner, Marcin Wisniowski, Tomasz Wojcik, Jörn Wüstenfeld, Sergey Yurevich, Yuri V. Zanevsky, Peter W. Zumbruch

  • We present measurements of exclusive ensuremathπ+,0 and η production in pp reactions at 1.25GeV and 2.2GeV beam kinetic energy in hadron and dielectron channels. In the case of π+ and π0 , 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 Δ (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 → pp η , since controversial data exist at 2.0GeV; we find \ensuremathσ=0.142±0.022 mb. Using the dielectron channels, the π0 and η 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.

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Author:Geydar AgakishievGND, Héctor Álvarez-PolORCiD, Andrzej Balanda, Roberto Bassini, Michael BöhmerORCiDGND, Helmut Bokemeyer, Jean-Louis Boyard, Pablo Cabanelas EirasORCiD, Sergey Chernenko, Tassilo Christ, Marco Giovanni Maria DestefanisORCiDGND, Frank Dohrmann, Adrian Dybczak, Thomas Eberl, Laura FabbiettiORCiDGND, Oleg Fateev, Paolo FinocchiaroORCiD, Jürgen Friese, Ingo FröhlichORCiD, Tetyana GalatyukORCiDGND, Juan A. Garzón, Roman GernhäuserORCiDGND, Camilla Gilardi, Marina Golubeva, Diégo González-DíazORCiDGND, Fedor GuberORCiD, Malgorzata Gumberidze, Thierry Hennino, Romain HolzmannORCiD, Alexander P. Ierusalimov, Ileana IoriGND, Alexander IvashkinORCiD, Martin JurkovičGND, Burkhard KämpferORCiDGND, Kalliopi Kanaki, Tatiana L. KaravichevaORCiD, Ilse KoenigGND, Wolfgang KoenigGND, Burkhard W. Kolb, Roland KotteORCiD, Anna Kozuch, Filip KrizekORCiD, Wolfgang KühnORCiD, Andrej KuglerORCiD, Alexei Kurepin, Simon Martin LangGND, Kirill LapidusORCiD, Tong Liu, Ludwig W. MaierGND, Jochen MarkertGND, Volker MetagORCiDGND, Beata Michalska, Emilie Morinière, Jehad Mousa, Mathias Münch, Christian MüntzORCiD, Lothar NaumannORCiD, Jacek Tomasz OtwinowskiORCiD, Yvonne C. PachmayerORCiDGND, Vladimir Pechenov, Olga Pechenova, Tiago Pérez Cavalcanti, Jerzy Pietraszko, Vladimir Pospısil, Witold PrzygodaORCiD, Béatrice RamsteinORCiD, Andrey ReshetinORCiD, M. Roy-Stephan, Anar RustamovORCiDGND, Alexander SadovskyGND, Benjamin Sailer, Piotr SalaburaORCiD, M. Sánchez, Alexander SchmahORCiDGND, Erwin Schwab, Yuri G. SobolevORCiDGND, Stefano SpataroORCiD, Björn Spruck, Herbert Ströbele, Joachim StrothORCiDGND, Christian Thomas Sturm, Attilio Tarantola PeloniGND, Khaled TeilabGND, Pavel Tlustý, Alberica ToiaORCiD, Michael TraxlerORCiDGND, Radoslaw Trebacz, Haralabos TsertosORCiD, Vladimir Wagner, Marcin Wisniowski, Tomasz Wojcik, Jörn WüstenfeldGND, Sergey YurevichGND, Yuri V. ZanevskyGND, Peter W. ZumbruchGND
URN:urn:nbn:de:hebis:30:3-273091
DOI:https://doi.org/10.1140/epja/i2012-12074-9
ISSN:1434-601X
ISSN:1434-6001
Parent Title (English):The European physical journal A
Publisher:Springer
Place of publication:Berlin ; Heidelberg
Document Type:Article
Language:English
Date of Publication (online):2012/05/29
Date of first Publication:2012/05/29
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2012/12/13
Volume:48
Issue:74
Page Number:17
First Page:1
Last Page:17
Note:
This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
HeBIS-PPN:450987116
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - Namensnennung 3.0