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Delta Delta excitation in proton-proton induced pi(0)pi(0) production
- Skorodko, T. (author)
- Bashkanov, M. (author)
- Bogoslawsky, D. (author)
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- Clement, H. (author)
- Doroshkevich, E. (author)
- Demiroers, L. (author)
- Ivanov, G. (author)
- Jiganov, E. (author)
- Khakimova, O. (author)
- Kren, F. (author)
- Meier, R. (author)
- Morosov, B. (author)
- Pauly, C. (author)
- Petukhov, Y. (author)
- Povtorejko, A. (author)
- Scobel, W. (author)
- Shwartz, B. (author)
- Stepaniak, J. (author)
- Tikhomirov, V. (author)
- Wagner, G. J. (author)
- Yamamoto, A. (author)
- Zabierowski, J. (author)
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- (creator_code:org_t)
- Elsevier BV, 2011
- 2011
- English.
- In: Physics Letters B. - : Elsevier BV. - 0370-2693 .- 1873-2445. ; 695:1-4, s. 115-123
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Exclusive measurements of the pp -> pp pi(0)pi(0) reaction have been performed at CELSIUS/WASA at energies from threshold up to T-p = 1.3 GeV. Total and differential cross sections have been obtained. Here we concentrate on energies T-p >= GeV. where the Delta Delta excitation becomes the leading process. No evidence is found for a significant ABC effect beyond that given by the conventional t-channel Delta Delta excitation. This holds also for the double-pionic fusion to the quasibound He-2. The data are compared to model predictions, which are based on both pi- and rho-exchange. Total and differential cross sections are at variance with these predictions and call for a profound modification of the rho-exchange. A phenomenological modification allowing only a small rho-exchange contribution leads to a quantitative description of the data.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Delta Delta excitation
- Two-pion production
- pi-exchange
- rho-exchange
- Physics
- Fysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Skorodko, T.
- Bashkanov, M.
- Bogoslawsky, D.
- Calén, Hans
- Clement, H.
- Doroshkevich, E.
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- Demiroers, L.
- Ekström, Curt
- Fransson, Kjell
- Gustafsson, Leif
- Höistad, Bo
- Ivanov, G.
- Jacewicz, Marek
- Jiganov, E.
- Johansson, Tord
- Khakimova, O.
- Keleta, S. Negas ...
- Koch, I.
- Kren, F.
- Kullander, Sven
- Kupsc, Andrzej
- Marciniewski, Pa ...
- Meier, R.
- Morosov, B.
- Pauly, C.
- Petrén, Henrik
- Petukhov, Y.
- Povtorejko, A.
- Ruber, Roger
- Schönning, Karin
- Scobel, W.
- Shwartz, B.
- Stepaniak, J.
- Thörngren Engblo ...
- Tikhomirov, V.
- Wagner, G. J.
- Wolke, Magnus
- Yamamoto, A.
- Zabierowski, J.
- Zlomanczuk, Joze ...
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- About the subject
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- NATURAL SCIENCES
- NATURAL SCIENCES
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- By the university
- Uppsala University
- Stockholm University
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