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Double-Pionic Fusion of Nuclear Systems and the "ABC" Effect : Approaching a Puzzle by Exclusive and Kinematically Complete Measurements
- Bashkanov, M. (author)
-
- Bargholtz, C. (author)
- Stockholms universitet,Fysikum,kärnfysik
- Berlowski, M. (author)
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- Bogoslawsky, D. (author)
- Clement, H. (author)
- Demiroers, L. (author)
- Doroshkevich, E. (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)
- Pricking, A. (author)
- Scobel, W. (author)
- Shwartz, B. (author)
- Skorodko, T. (author)
- Sopov, V. (author)
- Stepaniak, J. (author)
- Tikhomirov, V. (author)
- Turowiecki, A. (author)
- Wagner, G. J. (author)
- Wolke, M. (author)
- Zabierowski, J. (author)
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- (creator_code:org_t)
- 2009
- 2009
- English.
- In: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 102:5, s. 052301-
- Journal article (peer-reviewed)
Abstract
Subject headings
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- The ABC effect-a puzzling low-mass enhancement in the pi pi invariant mass spectrum, first observed by Abashian, Booth, and Crowe-is well known from inclusive measurements of two-pion production in nuclear fusion reactions. Here we report on the first exclusive and kinematically complete measurements of the most basic double-pionic fusion reaction pn -> d pi(0)pi(0) at beam energies of 1.03 and 1.35 GeV. The measurements, which have been carried out at CELSIUS-WASA, reveal the ABC effect to be a (pi pi)(I=L=0) channel phenomenon associated with both a resonancelike energy dependence in the integral cross section and the formation of a Delta Delta system in the intermediate state. A corresponding simple s-channel resonance ansatz provides a surprisingly good description of the data.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Keyword
- Physics
- Fysik
- Nuclear physics
- Nuclear Physics
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Bashkanov, M.
- Bargholtz, C.
- Berlowski, M.
- Bogoslawsky, D.
- Calén, Hans
- Clement, H.
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- Demiroers, L.
- Doroshkevich, E.
- Duniec, David
- Ekström, Curt
- Fransson, Kjell
- Geren, L.
- Gustafsson, Leif
- Höistad, Bo
- Ivanov, G.
- Ruber, Roger J. ...
- Jiganov, E.
- Johansson, Tord
- Khakimova, O.
- Keleta, Samson
- Koch, Inken
- Kren, F.
- Kullander, Sven
- Kupsc, Andrzej
- Lindberg, K.
- Marciniewski, Pa ...
- Meier, R.
- Morosov, B.
- Pauly, C.
- Pettersson, Henr ...
- Petukhov, Y.
- Povtorejko, A.
- Pricking, A.
- Schönning, Karin
- Scobel, W.
- Shwartz, B.
- Skorodko, T.
- Sopov, V.
- Stepaniak, J.
- Tegner, P. -E
- Thörngren-Engblo ...
- Tikhomirov, V.
- Turowiecki, A.
- Wagner, G. J.
- Wolke, M.
- Zabierowski, J.
- Zartova, I.
- Zlomanczuk, Joze ...
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