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Exclusive measurement of the pp -> nn pi(+)pi(+) reaction at 1.1 GeV
Uppsala University, The Svedberg Laboratory.
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2011 (English)In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 47, no 9, 108- p.Article in journal (Refereed) Published
Abstract [en]

First exclusive data for the pp -> nnp(+)pi(+) reaction have been obtained at CELSIUS with the WASA detector setup at a beam energy of T(p) - 1.1 GeV. Total and differential cross-sections disagree with theoretical calculations, which predict the Delta Delta excitation to be the dominant process at this beam energy. Instead, the data require the excitation of one of the nucleons to a higher-lying Delta state, preferably the Delta(1600)P(33), to be the leading process.

Place, publisher, year, edition, pages
2011. Vol. 47, no 9, 108- p.
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Physical Sciences
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URN: urn:nbn:se:uu:diva-162716DOI: 10.1140/epja/i2011-11108-2ISI: 000296632400009OAI: oai:DiVA.org:uu-162716DiVA: diva2:461742
Available from: 2011-12-05 Created: 2011-12-05 Last updated: 2017-12-08Bibliographically approved

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Calén, HansEkström, CurtFransson, KjellGustafsson, LeifHöistad, BoJacewicz, MarekJohansson, TordKullander, SvenKupsc, AndrzejMarciniewski, PawelRuber, Roger J. M. Y.Schönning, KarinWolke, MagnusZlomanczuk, Jozef

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Calén, HansEkström, CurtFransson, KjellGustafsson, LeifHöistad, BoJacewicz, MarekJohansson, TordKullander, SvenKupsc, AndrzejMarciniewski, PawelRuber, Roger J. M. Y.Schönning, KarinWolke, MagnusZlomanczuk, Jozef
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The Svedberg LaboratoryDepartment of Physics and AstronomyNuclear Physics
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