Exclusive Measurements of $pd\to ^3He ππ$ : the $ABC$ Effect Revisited

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dc.creatorBashkanov, M.
dc.creatorBogoslawsky, D.
dc.creatorCalén, H.
dc.creatorCappellaro, F.
dc.creatorClement, H.
dc.creatorDemiroers, L.
dc.creatorEkström, C.
dc.creatorFransson, K.
dc.creatorGreiff, J.
dc.creatorGustafsson, L.
dc.creatorHöistad, B.
dc.creatorIvanov, G.
dc.creatorJacewicz, M.
dc.creatorJiganov, E.
dc.creatorJohansson, T.
dc.creatorKaskulov, M. M.
dc.creatorKeleta, S.
dc.creatorKoch, I.
dc.creatorKullander, S.
dc.creatorKupść, A.
dc.creatorKuznetsov, A.
dc.creatorMarciniewski, P.
dc.creatorMeier, R.
dc.creatorMorosov, B.
dc.creatorOelert, W.
dc.creatorPauly, C.
dc.creatorPetukhov, Y.
dc.creatorPovtorejko, A.
dc.creatorRuber, R. J. M. Y.
dc.creatorScobel, W.
dc.creatorSkorodko, T.
dc.creatorShwartz, B.
dc.creatorSopov, V.
dc.creatorStepaniak, J.
dc.creatorTchernyshev, V.
dc.creatorThörngren-Engblom, P.
dc.creatorTikhomirov, V.
dc.creatorTurowiecki, A.
dc.creatorWagner, G. J.
dc.creatorWolke, M.
dc.creatorYamamoto, A.
dc.creatorZabierowski, J.
dc.creatorZlomanczuk, J.
dc.date2005-08-11
dc.date2006-09-10
dc.date.accessioned2026-07-07T11:07:23Z
dc.date.available2026-07-07T11:07:23Z
dc.descriptionExclusive measurements of the reactions $pd\to$ $^3He π^+ π^-$ and $pd\to$ $^3He π^0π^0$ have been carried out at $T_p=0.895$ GeV at the CELSIUS storage ring using the WASA detector. The $π^+π^-$ channel evidences a pronounced enhancement at low invariant $ππ$ masses - as anticipated from previous inclusive measurements of the ABC effect. This enhancement is seen to be even much larger in the isoscalar $π^0π^0$ channel. The differential distributions prove this enhancement to be of scalar-isoscalar nature. $ΔΔ$ calculations give a good description of the data, if a boundstate condition is imposed for the intermediate $ΔΔ$ system.
dc.descriptionextended version, 8 pages, 7 figures, theoretical model calculations added
dc.identifierhttps://arxiv.org/abs/nucl-ex/0508011
dc.identifierhttp://arxiv.org/abs/nucl-ex/0508011
dc.identifierPhys.Lett.B637:223-228,2006
dc.identifierdoi:10.1016/j.physletb.2006.03.082
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/189824
dc.subjectNuclear Experiment
dc.titleExclusive Measurements of $pd\to ^3He ππ$ : the $ABC$ Effect Revisited
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