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Excitation of the Roper resonance in single- and double-pion production in nucleon-nucleon collisions
- Skorodko, T. (author)
- Bashkanov, M. (author)
- Bogoslawsky, D. (author)
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- Clement, H. (author)
- Demiroers, L. (author)
- Doroshkevich, E. (author)
- Ivanov, G. (author)
- Jiganov, E. (author)
- Khakimova, O. (author)
- Kaskulov, M. (author)
- Keleta, S. (author)
- Kren, F. (author)
- Kuznetsov, A. (author)
- Meier, R. (author)
- Morosov, B. (author)
- Pauly, C. (author)
- Petukhov, Y. (author)
- Povtorejko, A. (author)
- Scobel, W. (author)
- Shwartz, B. (author)
- Sopov, V. (author)
- Stepeniak, J. (author)
- Tikhomirov, V. (author)
- Wagner, G. J. (author)
- Wolke, M. (author)
- Yamamoto, A. (author)
- Zabierowski, J. (author)
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- (creator_code:org_t)
- 2008-04-09
- 2008
- English.
- In: European Physical Journal A. - : Springer Science and Business Media LLC. - 1434-6001 .- 1434-601X. ; 35:3, s. 317-319
- Journal article (peer-reviewed)
Abstract
Subject headings
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- In most investigations the Roper resonance is sensed only very indirectly via complex partial-wave analyses. We find indications for its excitation in the invariant n pi(+) mass spectrum of the pp -> np pi(+) reaction at M approximate to 1360 MeV with a width of approximate to 150 MeV . The values fit very favorably to the most recent phase shift results as well as to the observations at BES. In the near-threshold two-pion production pp -> pp pi(0)pi(0) , where the Roper excitation and its subsequent decays via the routes N* -> Delta pi -> N pi pi and N* -> N sigma are the only dominant processes, we find its direct decay into the N sigma channel to be the by far dominating decay process -in favor of a monopole excitation of the Roper resonance.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Physics
- Fysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Skorodko, T.
- Bashkanov, M.
- Bogoslawsky, D.
- Calén, Hans
- Cappellaro, Fili ...
- Clement, H.
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- Demiroers, L.
- Doroshkevich, E.
- Duniec, David
- Ekström, Curt
- Franssen, Kjell
- Gustafsson, Leif
- Höistad, Bo
- Ivanov, G.
- Jacewicz, Marek
- Jiganov, E.
- Johansson, Tord
- Khakimova, O.
- Kaskulov, M.
- Keleta, S.
- Koch, Inken
- Kren, F.
- Kullander, Sven
- Kupsc, Andrzej
- Kuznetsov, A.
- Marciniewski, Pa ...
- Meier, R.
- Morosov, B.
- Pauly, C.
- Petterson, Henri ...
- Petukhov, Y.
- Povtorejko, A.
- Schönning, Karin
- Scobel, W.
- Shwartz, B.
- Sopov, V.
- Stepeniak, J.
- Thörngren-Engblo ...
- Tikhomirov, V.
- Wagner, G. J.
- Wolke, M.
- Yamamoto, A.
- Zabierowski, J.
- Zlomanczuk, Joze ...
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- NATURAL SCIENCES
- NATURAL SCIENCES
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- European Physica ...
- By the university
- Uppsala University
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