Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

2 Publications

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

Agakishiev, G.; Alvarez-Pol, H.; Balanda, A.; Bassini, R.; Böhmer, M.; Boyard, J. L.; Cabanelas, P.; Chernenko, S.; Christ, T.; Destefanis, M.; Dohrmann, F.; Dybczak, A.; Eberl, T.; Fabbietti, L.; Fateev, O.; Finocchiaro, P.; Friese, J.; Fröhlich, I.; Galatyuk, T.; Garzon, J. A.; Gernhäuser, R.; Gilardi, C.; Golubeva, M.; Gonzalez-Diaz, D.; Guber, F.; Gumberidze, M.; 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.; Kozuch, A.; Krizek, F.; Kühn, W.; Kugler, A.; Kurepin, A.; Lang, S.; Lapidus, K.; Liu, T.; Maier, L.; Markert, J.; Metag, V.; Michalska, B.; Moriniere, E.; Mousa, J.; Müntz, C.; Naumann, L.; Otwinowski, J.; Pachmayer, Y. C.; Pechenov, V.; Pechenova, O.; Pietraszko, J.; Przygoda, W.; Ramstein, B.; Reshetin, A.; Roy-Stephan, M.; Rustamov, A.; Sadovsky, A.; Sailer, B.; Salabura, P.; Sanchez, M.; Schmah, A.; Schwab, E.; Sobolev, Y. G.; Spataro, S.; Spruck, B.; Ströbele, H.; Stroth, J.; Sturm, C.; Tarantola, A.; Teilab, K.; Tlusty, P.; Toia, A.; Traxler, M.; Trebacz, R.; Tsertos, H.; Wagner, V.; Wisniowski, M.; Wüstenfeld, J.; Yurevich, S.; Zanevsky, Y.

Abstract

We present exclusive measurements of π+, π0 and ω production in pp reactions at 1.25 GeV and 2.2 GeV beam kinetic energy, in hadronic and dielectron channels. Using the former, high statistics invariant mass and angular distributions within the HADES acceptance are obtained for π+ and π0 exclusive production, as well as acceptance corrected distributions, which are compared to a resonance model. The sensitivity of the data to the Δ(1232) production angular distribution and to the contribution of higher lying baryon resonances is shown and an improved parameterization of the data is proposed. Cross sections are extracted especially in the case of pp->ppη at 2.2 GeV (σ=0.142 ± 0.022 mb) for which only old and controversial data existed. Using the dielectron channels, the π0 and η Dalitz decay signals could be 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.

Permalink: https://www.hzdr.de/publications/Publ-16376

Years: 2023 2022 2021 2020 2019 2018 2017 2016 2015