Baryon resonance production and dielectron decays in proton-proton collisions at 3.5 GeV

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

doi:10.1140/epja/i2014-14082-1

2022 Impact factor 2.7

Hadrons and Nuclei

Open Access

Eur. Phys. J. A (2014) 50: 82
https://doi.org/10.1140/epja/i2014-14082-1

Regular Article - Experimental Physics

Baryon resonance production and dielectron decays in proton-proton collisions at 3.5 GeV

G. Agakishiev⁷, A. Balanda³, D. Belver¹⁸, A. Belyaev⁷, J. C. Berger-Chen⁹, A. Blanco², M. Böhmer¹⁰, J. L. Boyard¹⁶, P. Cabanelas¹⁸, S. Chernenko⁷, A. Dybczak³, E. Epple⁹, L. Fabbietti⁹, O. Fateev⁷, P. Finocchiaro¹, P. Fonte², J. Friese¹⁰, I. Fröhlich⁸, T. Galatyuk⁵, J. A. Garzón¹⁸, R. Gernhäuser¹⁰, K. Göbel⁸, M. Golubeva¹³, D. González-Dıaz⁵, F. Guber¹³, M. Gumberidze⁵, T. Heinz⁴, T. Hennino¹⁶, R. Holzmann⁴, A. Ierusalimov⁷, I. Iori¹², A. Ivashkin¹³, M. Jurkovic¹⁰, B. Kämpfer⁶, T. Karavicheva¹³, I. Koenig⁴, W. Koenig⁴, B. W. Kolb⁴, G. Kornakov⁵, R. Kotte⁶, A. Krása¹⁷, F. Krizek¹⁷, R. Krücken¹⁰, H. Kuc³^,16, W. Kühn¹¹, A. Kugler¹⁷, A. Kurepin¹³, V. Ladygin⁷, R. Lalik⁹, S. Lang⁴, K. Lapidus⁹, A. Lebedev¹⁴, T. Liu¹⁶, L. Lopes², M. Lorenz⁸, L. Maier¹⁰, A. Mangiarotti², J. Markert⁸, V. Metag¹¹, B. Michalska³, J. Michel⁸, C. Müntz⁸, L. Naumann⁶, Y. C. Pachmayer⁸, M. Palka³, Y. Parpottas¹⁵, V. Pechenov⁴, O. Pechenova⁸, J. Pietraszko⁴, W. Przygoda³^*, B. Ramstein¹⁶, A. Reshetin¹³, A. Rustamov⁸, A. Sadovsky¹³, P. Salabura³, A. Schmah¹, E. Schwab⁴, J. Siebenson⁹, Yu. G. Sobolev¹⁷, S. Spataro¹, B. Spruck¹¹, H. Ströbele⁸, J. Stroth⁸^,4, C. Sturm⁴, A. Tarantola⁸, K. Teilab⁸, P. Tlusty¹⁷, M. Traxler⁴, R. Trebacz³, H. Tsertos¹⁵, T. Vasiliev⁷, V. Wagner¹⁷, M. Weber¹⁰, C. Wendisch⁶, J. Wüstenfeld⁶, S. Yurevich⁴ and Y. Zanevsky⁷

¹ INFN, Laboratori Nazionali del Sud, 95125, Catania, Italy
² LIP-Laboratório de Instrumentação e Física Experimental de Partículas, 3004-516, Coimbra, Portugal
³ Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059, Kraków, Poland
⁴ GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
⁵ Technische Universität Darmstadt, 64289, Darmstadt, Germany
⁶ Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314, Dresden, Germany
⁷ Joint Institute of Nuclear Research, 141980, Dubna, Russia
⁸ Institut für Kernphysik, Goethe-Universität, 60438, Frankfurt, Germany
⁹ Excellence Cluster “Origin and Structure of the Universe”, 85748, Garching, Germany
¹⁰ Physik Department E12, Technische Universität München, 85748, Garching, Germany
¹¹ II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392, Giessen, Germany
¹² INFN, Sezione di Milano, 20133, Milano, Italy
¹³ Institute for Nuclear Research, Russian Academy of Science, 117312, Moscow, Russia
¹⁴ Institute of Theoretical and Experimental Physics, 117218, Moscow, Russia
¹⁵ Department of Physics, University of Cyprus, 1678, Nicosia, Cyprus
¹⁶ Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3, Université Paris Sud, F-91406, Orsay Cedex, France
¹⁷ Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068, Rez, Czech Republic
¹⁸ LabCAF. F. Física, Univ. de Santiago de Compostela, 15706, Santiago de Compostela, Spain

^* e-mail: witold.przygoda@uj.edu.pl

Received: 3 January 2014
Revised: 12 March 2014
Accepted: 25 March 2014
Published online: 9 May 2014

Abstract

We report on baryon resonance production and decay in proton-proton collisions at a kinetic energy of 3.5 GeV based on data measured with HADES. The exclusive channels and as well as are studied simultaneously for the first time. The invariant masses and angular distributions of the pion-nucleon systems were studied and compared to simulations based on a resonance model ansatz assuming saturation of the pion production by an incoherent sum of baryonic resonances (R with masses < 2 GeV/c². A very good description of the one-pion production is achieved allowing for an estimate of individual baryon resonance production cross sections which are used as input to calculate the dielectron yields from decays. Two models of the resonance decays into dielectrons are examined assuming a point-like coupling and the dominance of the meson. The results of model calculations are compared to data from the exclusive channel by means of the dielectron and invariant mass distributions.

Conference announcements

ANPC 2023
29 November - 3 December 2023
Kruger Park Region, South Africa

Winter Workshop on Complex Systems
21-26 January 2024
Catalonia, Spain

AQC Days 2024
15-17 May 2024
Vogüé (Domaine Lou Capitelle, Ardèche), France

Self-Organizing Matter: From Inanimate to the Animate
July 1-26, 2024
Boulder Summer School 2024
Boulder, Colorado, USA

EPJ

Baryon resonance production and dielectron decays in proton-proton collisions at 3.5 GeV

Conference announcements