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WHAT IS THE NATURE OF THE ABC EFFECT?
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
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2011 (English)In: International Journal of Modern Physics A, ISSN 0217-751X, E-ISSN 1793-656X, Vol. 26, no 3-4, 627-629 p.Article in journal (Refereed) Published
Abstract [en]

The ABC effect - an intriguing low-mass enhancement in the pi pi invariant mass spectrum - is known from inclusive measurements of two-pion production in nuclear fusion reactions. Exclusive measurements have been carried out at CELSIUS/WASA and WASA-at-COSY for the fusion reactions leading to d, (3)He and (4)He. They all reveal this effect to be of isoscalar nature and associated with a narrow Lorentzian-shaped structure in the total cross section. The latter could point to the formation of an isoscalar resonance, which couples to the pn channel as well as to an intermediate Delta Delta state.

Place, publisher, year, edition, pages
2011. Vol. 26, no 3-4, 627-629 p.
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-171015DOI: 10.1142/S0217751X11052256ISI: 000287529800064OAI: oai:DiVA.org:uu-171015DiVA: diva2:510043
Available from: 2012-03-14 Created: 2012-03-14 Last updated: 2017-12-07

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