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Examination of the production of an isotensor dibaryon in the pp -> pp pi(+)pi(-) reaction
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
Natl Ctr Nucl Res, Div Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England.
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2019 (English)In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 99, no 2, article id 025201Article in journal (Refereed) Published
Abstract [en]

The quasifree pp -> pp pi(+)pi(-) reaction has been measured by means of pd collisions at T-p = 1.2 GeV using the WASA detector setup at COSY enabling exclusive and kinematically complete measurements. Total and differential cross sections have been extracted for the energy region T-p = 1.08-1.36 GeV (root s = 2.35-2.46 GeV) covering thus the regions of N* (1440 ) and Delta(1232)Delta(1232) resonance excitations. Calculations describing these excitations by t-channel meson exchange as well as isospin relations based on the pp -> pp pi(0)pi(0) data underpredict substantially the measured total cross section. The calculations are also at variance with specific experimental differential cross sections. An isotensor Delta N dibaryon resonance with I(J(P)) = 2(1(+) ) produced associatedly with a pion is able to overcome these deficiencies. Such a dibaryon was predicted by Dyson and Xuong [Phys. Rev. Lett. 13, 815 (1964)] and more recently calculated by A. Gal and H. Garcilazo [Nucl. Phys. A 928, 73 (2014)].

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AMER PHYSICAL SOC , 2019. Vol. 99, no 2, article id 025201
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Subatomic Physics
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URN: urn:nbn:se:uu:diva-377601DOI: 10.1103/PhysRevC.99.025201ISI: 000457696100003OAI: oai:DiVA.org:uu-377601DiVA, id: diva2:1291772
Available from: 2019-02-26 Created: 2019-02-26 Last updated: 2019-03-07Bibliographically approved

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Adlarson, PatrikCalén, HansFransson, KjellHeijkenskjöld, LenaJohansson, TordKupsc, AndrzejMarciniewski, PawelPszczel, DamianWolke, MagnusZlomanczuk, Jozef

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Adlarson, PatrikCalén, HansFransson, KjellHeijkenskjöld, LenaJohansson, TordKupsc, AndrzejMarciniewski, PawelPszczel, DamianWolke, MagnusZlomanczuk, Jozef
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