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Measurement of the ...
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Skorodko, TatianaTuebingen University, Physikalisches Institut,WASA-at-COSY
(author)
Measurement of the p n ---> p p pi0 pi- reaction in search of the ABC resonance
- Article/chapterEnglish2012
Publisher, publication year, extent ...
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Les Ulis Cedex, France :EDP Sciences,2012
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Numbers
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LIBRIS-ID:oai:DiVA.org:uu-196967
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-196967URI
Supplementary language notes
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Language:English
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Summary in:English
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Classification
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Subject category:vet swepub-contenttype
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Subject category:kon swepub-publicationtype
Notes
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With pd collisions at T_p = 1.2 GeV exclusive measurements of the quasi-free pn -> pppi^0pi^- reaction have been carried out. Using the WASA detector setup at COSY total and differential cross sections have been obtained for the energy region &radics = 2.35 - 2.48 GeV. Though this includes the region of the ABC effect and its associated resonance structure, no low-mass enhancement (ABC effect) is found in the pi^0pi^--invariant mass spectrum - in agreement with the constraint from Bose statistics demanding the isovector pion pair to be in relative p-wave. Conventional calculations including t-channel processes for Roper, Delta(1600) and DeltaDelta excitations and their decays, which are well-known from the study of the two-pion production in pp collisions, provide a reasonable description of the data at high energies, but fall low at low energies. From this we conclude that a large contribution from a so far unknown isoscalar low-energy process is missed in the calculations. Inclusion of the ABC resonance at m = 2.37 GeV with Gamma = 70 MeV and I(J^P) = 0(3^+), which was recently observed in the pn -> dpi^0pi^0 reaction, leads to a much improved description of the data at low energies.
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Bashkanov, MikhailTuebingen University, Physikalisches Institut,WASA-at-COSY
(author)
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Clement, HeinzTuebingen University, Physikalisches Institut,WASA-at-COSY
(author)
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Doroshkevich, EvguenyTuebingen University, Physikalisches Institut,WASA-at-COSY
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Perez del Rio, ElenaTuebingen University, Physikalisches Institut,WASA-at-COSY
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Pricking, AnnetteTuebingen University, Physikalisches Institut,WASA-at-COSY
(author)
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Wagner, Gerhard J.Tuebingen University, Physikalisches Institut,WASA-at-COSY
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Adlarson, PatrikUppsala universitet,Kärnfysik,WASA-at-COSY(Swepub:uu)patad399
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Calen, HansUppsala universitet,Kärnfysik,WASA-at-COSY(Swepub:uu)hanscale
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Fransson, KjellUppsala universitet,Kärnfysik,WASA-at-COSY(Swepub:uu)kjelfran
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Gullström, Carl-OscarUppsala universitet,Kärnfysik,WASA-at-COSY(Swepub:uu)cargu704
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Heijkenskjöld, LenaUppsala universitet,Kärnfysik,WASA-at-COSY(Swepub:uu)lenhe965
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Höistad, BoUppsala universitet,Kärnfysik,WASA-at-COSY(Swepub:uu)bohoista
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Johansson, TordUppsala universitet,Kärnfysik,WASA-at-COSY(Swepub:uu)tordjoha
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Kupsc, AndrzejUppsala universitet,Kärnfysik,WASA-at-COSY(Swepub:uu)andrkups
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Marciniewski, PawelUppsala universitet,Kärnfysik,WASA-at-COSY(Swepub:uu)pawemarc
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Plucinski, PawelUppsala universitet,Kärnfysik,WASA-at-COSY(Swepub:uu)pawpl866
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Pszczel, DamianUppsala universitet,Kärnfysik,WASA-at-COSY(Swepub:uu)damps525
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Pyszniak, AndrzejUppsala universitet,Kärnfysik,WASA-at-COSY(Swepub:uu)andpy741
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Redmer, Christoph FlorianUppsala universitet,Kärnfysik,WASA-at-COSY
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Wolke, MagnusUppsala universitet,Kärnfysik,WASA-at-COSY(Swepub:uu)mawol031
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Zlomanczuk, JozefUppsala universitet,Kärnfysik,WASA-at-COSY(Swepub:uu)jozezlom
(author)
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Tuebingen University, Physikalisches InstitutWASA-at-COSY
(creator_code:org_t)
Related titles
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In:Proceedings of 12th International Workshop on Production, properties and interaction of mesons (MESON 2012)Les Ulis Cedex, France : EDP Sciences, s. 09033-
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Skorodko, Tatian ...
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Bashkanov, Mikha ...
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Clement, Heinz
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Doroshkevich, Ev ...
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Perez del Rio, E ...
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Pricking, Annett ...
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Wagner, Gerhard ...
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Adlarson, Patrik
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Calen, Hans
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Fransson, Kjell
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Gullström, Carl- ...
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Heijkenskjöld, L ...
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Höistad, Bo
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Johansson, Tord
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Kupsc, Andrzej
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Marciniewski, Pa ...
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Plucinski, Pawel
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Pszczel, Damian
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Pyszniak, Andrze ...
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Redmer, Christop ...
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Wolke, Magnus
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Zlomanczuk, Joze ...
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