Σ0 production in proton nucleus collisions near threshold

Jörn Adamczewski-Musch, Geydar Agakishiev, Oliver Werner Arnold, E.T. Atomssa, Claudia Behnke, Jia-Chii Berger-Chen, Jacek Biernat, Alberto Blanco, Christoph Blume, Michael Böhmer, Paula Bordalo, S. Chernenko, Christina Anna Deveaux, A. Dybczak, Eliane Epple, Laura Fabbietti, Oleg Fateev, Paulo Fonte, C. Franco, J. Friese, I. Fröhlich, Tetyana Galatyuk, J.A. Garzón, Roman Gernhäuser, K. Gill, Marina Golubeva, Fedor Guber, Malgorzata Gumberidze, Szymon Harabasz, T. Hennino, Stanislav Hlaváč, Claudia Höhne, R. Holzmann, Alexander P. Ierusalimov, Ivashkin Ivashkin, M. Jurkovic, B. Kämpfer, Tatiana L. Karavicheva, Behruz Kardan, I. Koenig, W. Koenig, B.W. Kolb, Grzegorz Korcyl, G. Kornakov, R. Kotte, A. Krása, E. Krebs, H. Kuc, Andrej Kugler, Tobias Kunz, Alexander Kurepin, A. Kurilkin, P. Kurilkin, Vladimir P. Ladygin, Rafał Tomasz Lalik, Kirill Lapidus, Alexei Lebedev, L. Lopes, M. Lorenz, Tariq Mahmoud, L. Maier, Steffen Maurus, Alessio Mangiarotti, Jochen Markert, Volker Metag, J. Michel, Christian Müntz, Robert Helmut Münzer, L. Naumann, Marek Palka, Y. Parpottas, Vladimir Pechenov, Olga Pechenova, Vlasios Petousis, Jerzy Pietraszko, Witold Przygoda, S. Ramos, Béatrice Ramstein, Laura Rehnisch, Andrey Reshetin, Adrian Rost, Anar Rustamov, A. Sadovsky, Piotr Salabura, T. Scheib, Korbinian Schmidt-Sommerfeld, Heidi Schuldes, Patrick Sellheim, Johannes Stephan Siebenson, L. Silva, Yuri G. Sobolev, Stefano Spataro, Herbert Ströbele, Joachim Stroth, Paweł Strzempek, C. Sturm, Ondřej Svoboda, A. Tarantola, K. Teilab, Pavel Tlustý, Michael Traxler, Haralabos Tsertos, T. Vasiliev, V. Wagner, Christian Wendisch, Joana Wirth, Jörn Wüstenfeld, Y. Zanevsky, Peter W. Zumbruch

  • The production of Σ0 baryons in the nuclear reaction p (3.5 GeV) + Nb (corresponding to sNN=3.18 GeV) is studied with the detector set-up HADES at GSI, Darmstadt. Σ0s were identified via the decay Σ0→Λγ with subsequent decays Λ→pπ− in coincidence with a e+e− pair from either external (γ→e+e−) or internal (Dalitz decay γ⁎→e+e−) gamma conversions. The differential Σ0 cross section integrated over the detector acceptance, i.e. the rapidity interval 0.5<y<1.1, has been extracted as ΔσΣ0=2.3±(0.2)stat±(−0.6+0.6)sys±(0.2)norm mb, yielding the inclusive production cross section in full phase space σΣ0total=5.8±(0.5)stat±(−1.4+1.4)sys±(0.6)norm±(1.7)extrapol mb by averaging over different extrapolation methods. The Λall/Σ0 ratio within the HADES acceptance is equal to 2.3±(0.2)stat±(−0.6+0.6)sys. The obtained rapidity and momentum distributions are compared to transport model calculations. The Σ0 yield agrees with the statistical model of particle production in nuclear reactions. Keywords: Hyperons, Strangeness, Proton, Nucleus.

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Author:Jörn Adamczewski-MuschORCiD, Geydar AgakishievGND, Oliver Werner Arnold, E.T. Atomssa, Claudia BehnkeORCiDGND, Jia-Chii Berger-Chen, Jacek BiernatORCiD, Alberto BlancoORCiD, Christoph BlumeORCiDGND, Michael BöhmerORCiDGND, Paula BordaloORCiD, S. Chernenko, Christina Anna DeveauxORCiDGND, A. Dybczak, Eliane EppleORCiD, Laura FabbiettiORCiDGND, Oleg Fateev, Paulo FonteORCiDGND, C. Franco, J. Friese, I. Fröhlich, Tetyana GalatyukORCiDGND, J.A. Garzón, Roman GernhäuserORCiDGND, K. Gill, Marina Golubeva, Fedor GuberORCiD, Malgorzata Gumberidze, Szymon HarabaszORCiD, T. Hennino, Stanislav HlaváčORCiD, Claudia HöhneGND, R. Holzmann, Alexander P. Ierusalimov, Ivashkin IvashkinORCiD, M. Jurkovic, B. Kämpfer, Tatiana L. KaravichevaORCiD, Behruz KardanORCiD, I. Koenig, W. Koenig, B.W. Kolb, Grzegorz KorcylORCiD, G. Kornakov, R. Kotte, A. Krása, E. Krebs, H. Kuc, Andrej KuglerORCiD, Tobias Kunz, Alexander KurepinORCiD, A. Kurilkin, P. Kurilkin, Vladimir P. Ladygin, Rafał Tomasz Lalik, Kirill LapidusORCiD, Alexei Lebedev, L. Lopes, M. Lorenz, Tariq MahmoudGND, L. Maier, Steffen Maurus, Alessio MangiarottiORCiD, Jochen MarkertGND, Volker MetagORCiDGND, J. Michel, Christian Müntz, Robert Helmut MünzerORCiDGND, L. Naumann, Marek PalkaORCiD, Y. Parpottas, Vladimir Pechenov, Olga Pechenova, Vlasios Petousis, Jerzy Pietraszko, Witold PrzygodaORCiD, S. Ramos, Béatrice RamsteinORCiD, Laura RehnischGND, Andrey ReshetinORCiD, Adrian RostGND, Anar RustamovORCiDGND, A. Sadovsky, Piotr SalaburaORCiD, T. Scheib, Korbinian Schmidt-SommerfeldORCiD, Heidi SchuldesGND, Patrick SellheimGND, Johannes Stephan SiebensonGND, L. Silva, Yuri G. SobolevORCiDGND, Stefano SpataroORCiD, Herbert Ströbele, Joachim StrothORCiD, Paweł Strzempek, C. Sturm, Ondřej Svoboda, A. Tarantola, K. Teilab, Pavel Tlustý, Michael TraxlerORCiD, Haralabos TsertosORCiD, T. Vasiliev, V. Wagner, Christian WendischGND, Joana WirthORCiD, Jörn WüstenfeldGND, Y. Zanevsky, Peter W. ZumbruchGND
URN:urn:nbn:de:hebis:30:3-700498
DOI:https://doi.org/https://doi.org/10.1016/j.physletb.2018.02.043
ISSN:0370-2693
ISSN:1873-2445
Parent Title (English):Physics Letters B
Publisher:Elsevier
Place of publication:Amsterdam
Document Type:Article
Language:English
Date of Publication (online):2018/06/10
Date of first Publication:2018/06/10
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2022/09/26
Tag:Hyperons; Nucleus; Proton; Strangeness
Volume:781
Page Number:6
First Page:735
Last Page:740
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - Namensnennung 4.0