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ISOSPIN DECOMPOSITION OF pp -> NN pi pi CROSS SECTIONS : DO WE SEE A SIGN OF Delta(1600) EXCITATION IN THE nn pi(+)pi(+) CHANNEL?
- Skorodko, T. (author)
- Bashkanov, M. (author)
- Bogoslowsky, D. (author)
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- Clement, H. (author)
- Ivanov, G. (author)
- Jiganov, E. (author)
- Khakimova, O. (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)
- Stepaniak, J. (author)
- Tikhomirov, V. (author)
- Turowiecki, A. (author)
- Wagner, G. J. (author)
- Wolke, M. (author)
- Yamamoto, A. (author)
- Zabierowski, J. (author)
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- (creator_code:org_t)
- 2009
- 2009
- English.
- In: International Journal of Modern Physics A. - 0217-751X .- 1793-656X. ; 24:2-3, s. 450-453
- Journal article (peer-reviewed)
Abstract
Subject headings
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- The two-pion production in pp-collisions has been investigated in exclusive measurements from threshold up to T-p = 1.36 GeV. Total and differential cross sections have been obtained for the channels pn pi(+) pi(0), pp pi(+) pi(-), pp pi(0)pi(0) and also nn pi(+)pi(+). For intermediate incident energies T-p > 1 GeV, i.e. in the region, which is beyond the Roper excitation but at the onset of Delta Delta excitation the total pp pi(0)pi(0) cross section falls behind theoretical predictions by as much as an order of magnitude near 1.2 GeV, whereas the nn pi(+)pi(+) cross section is a factor of five larger than predicted. A model-unconstrained isospin decompostion of the cross section points to a significant contribution of an isospin 3/2 resonance other than the Delta(1232). As a possible candidate the Delta(1600) is discussed.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Isospin decomposition
- poper resonance
- Delta Delta excitation
- Delta (1600) excitation
- Physics
- Fysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Skorodko, T.
- Bashkanov, M.
- Bogoslowsky, D.
- Calén, Hans
- Clement, H.
- Ekström, Curt
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- Fransson, Kjell
- Gustafsson, Leif
- Höistad, Bo
- Ivanov, G.
- Jacewicz, Marek
- Jiganov, E.
- Johansson, Tord
- Keleta, Samson
- Khakimova, O.
- Koch, Inken
- Kren, F.
- Kullander, Sven
- Kupsc, Andrzej
- Kuznetsov, A.
- Marciniewski, Pa ...
- Meier, R.
- Morosov, B.
- Pauly, C.
- Petterson, Henri ...
- Petukhov, Y.
- Povtorejko, A.
- Ruber, Roger J. ...
- Schönning, Karin
- Scobel, W.
- Shwartz, B.
- Sopov, V.
- Stepaniak, J.
- Thörngren-Engblo ...
- Tikhomirov, V.
- Turowiecki, A.
- Wagner, G. J.
- Wolke, M.
- Yamamoto, A.
- Zabierowski, J.
- Zlomanczuk, Joze ...
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- Uppsala University
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