Double-Pionic Fusion of Nuclear Systems and the ABCEffect -- Aproaching a Puzzle by Exclusive and Kinematically Complete Measurements

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dc.creatorBashkanov, M.
dc.creatorBargholtz, C.
dc.creatorBerlowski, M.
dc.creatorBogoslawsky, D.
dc.creatorCalen, H.
dc.creatorClement, H.
dc.creatorDemiroers, L.
dc.creatorDoroshkevich, E.
dc.creatorDuniec, D.
dc.creatorEkstrom, C.
dc.creatorFransson, K.
dc.creatorGeren, L.
dc.creatorGustafsson, L.
dc.creatorHoistad, B.
dc.creatorIvanov, G.
dc.creatorJacewicz, M.
dc.creatorJiganov, E.
dc.creatorJohansson, T.
dc.creatorKhakimova, O.
dc.creatorKeleta, S.
dc.creatorKoch, I.
dc.creatorKren, F.
dc.creatorKullander, S.
dc.creatorKupsc, A.
dc.creatorLindberg, K.
dc.creatorMarciniewski, P.
dc.creatorMeier, R.
dc.creatorMorosov, B.
dc.creatorPauly, C.
dc.creatorPettersson, H.
dc.creatorPetukhov, Y.
dc.creatorPovtorejko, A.
dc.creatorPricking, A.
dc.creatorRuber, R. J. M. Y.
dc.creatorSchonning, K.
dc.creatorScobel, W.
dc.creatorShwartz, B.
dc.creatorSkorodko, T.
dc.creatorSopov, V.
dc.creatorStepaniak, J.
dc.creatorTegner, P. -E.
dc.creatorThorngren-Engblom, P.
dc.creatorTikhomirov, V.
dc.creatorTurowiecki, A.
dc.creatorWagner, G. J.
dc.creatorWolke, M.
dc.creatorZabierowski, J.
dc.creatorZartova, I.
dc.creatorZlomanczuk, J.
dc.date2008-06-30
dc.date2009-01-07
dc.date.accessioned2026-07-07T12:46:54Z
dc.date.available2026-07-07T12:46:54Z
dc.descriptionThe ABC effect - a puzzling low-mass enhancement in the $ππ$ invariant mass spectrum - is well-known from inclusive measurements of two-pion production in nuclear fusion reactions. Here we report on first exclusive and kinematically complete measurements of the most basic double pionic fusion reaction $pn \to d π^0π^0$ at 1.03 and 1.35 GeV. The measurements, which have been carried out at CELSIUS-WASA, reveal the ABC effect to be a $(ππ)_{I=L=0}$ channel phenomenon associated with both a resonance-like energy dependence in the integral cross section and the formation of a $ΔΔ$ system in the intermediate state. A corresponding simple s-channel resonance ansatz provides a surprisingly good description of the data.
dc.identifierhttps://arxiv.org/abs/0806.4942
dc.identifierhttp://arxiv.org/abs/0806.4942
dc.identifierPhys.Rev.Lett.102:052301,2009
dc.identifierdoi:10.1103/PhysRevLett.102.052301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/221542
dc.subjectNuclear Experiment
dc.titleDouble-Pionic Fusion of Nuclear Systems and the ABCEffect -- Aproaching a Puzzle by Exclusive and Kinematically Complete Measurements
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