Mesonic and nonmesonic weak decay widths of medium-heavy lambda hypernuclei

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dc.creatorSato, Y.
dc.creatorAjimura, S.
dc.creatorAoki, K.
dc.creatorBhang, H.
dc.creatorHasegawa, T.
dc.creatorHashimoto, O.
dc.creatorHotchi, H.
dc.creatorKim, Y. D.
dc.creatorKishimoto, T.
dc.creatorMaeda, K.
dc.creatorNoumi, H.
dc.creatorOhta, Y.
dc.creatorOmata, K.
dc.creatorOuta, H.
dc.creatorPark, H.
dc.creatorSekimoto, M.
dc.creatorShibata, T.
dc.creatorTakahashi, T.
dc.creatorYoun, M.
dc.date2004-09-12
dc.date2005-03-15
dc.date.accessioned2026-07-07T05:37:23Z
dc.date.available2026-07-07T05:37:23Z
dc.descriptionWe have measured the energy spectra of pions and protons emitted in the weak decay of 12_Lambda_C, 28_Lambda_Si, and Lambda_Fe hypernuclei produced via the (pi+, K+) reaction. The decay widths of the pi- mesonic decay (Lambda -> p + pi-) and the nonmesonic decay (Lambda + N -> N + N) were extracted. The present results demonstrate an increase of the mesonic decay width due to a distortion of the pion wave function in nuclear medium for the first time. The ratios of the neutron- to proton-induced nonmesonic decay widths, Gamma_n(Lambda + n -> n + n)/Gamma_p(Lambda + p -> n + p), were evaluated by a direct comparison of the measured proton energy spectra with the calculated ones. No theoretical calculation which has been proposed so far can simultaneously account for both the nonmesonic decay widths and the Gamma_n/Gamma_p ratios in the present data.
dc.description28 pages, 11 figures, Published in Physical Review C
dc.identifierhttps://arxiv.org/abs/nucl-ex/0409007
dc.identifierhttp://arxiv.org/abs/nucl-ex/0409007
dc.identifierPhysical Review C71, 025203 (2005)
dc.identifierdoi:10.1103/PhysRevC.71.025203
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/81282
dc.subjectNuclear Experiment
dc.titleMesonic and nonmesonic weak decay widths of medium-heavy lambda hypernuclei
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