Exclusive proton asymmetry measurement in non-mesonic weak decay of polarized 5_Lambda_He

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dc.creatorMaruta, T.
dc.creatorAjimura, S.
dc.creatorAoki, K.
dc.creatorBanu, A.
dc.creatorBhang, H.
dc.creatorFukuda, T.
dc.creatorHashimoto, O.
dc.creatorHwang, J. I.
dc.creatorKameoka, S.
dc.creatorKang, B. H.
dc.creatorKim, E. H.
dc.creatorKim, J. H.
dc.creatorKim, M. J.
dc.creatorMiura, Y.
dc.creatorMiyake, Y.
dc.creatorNagae, T.
dc.creatorNakamura, M.
dc.creatorNakamura, S. N.
dc.creatorNoumi, H.
dc.creatorOkada, S.
dc.creatorOkayasu, Y.
dc.creatorOuta, H.
dc.creatorPark, H.
dc.creatorSaha, P. K.
dc.creatorSato, Y.
dc.creatorSekimoto, M.
dc.creatorTakahashi, T.
dc.creatorTamura, H.
dc.creatorTanida, K.
dc.creatorToyoda, A.
dc.creatorTsukada, K.
dc.creatorWatanabe, T.
dc.creatorYim, H. J.
dc.date2005-09-13
dc.date.accessioned2026-07-07T05:37:38Z
dc.date.available2026-07-07T05:37:38Z
dc.descriptionThe asymmetry parameter alpha_p^NM for a proton exclusively emitted in the Lambda p -> np process was, for the first time, measured in the non-mesonic weak decay of a polarized 5_La,bda_He hypernucleus by selecting the proton-neutron pairs emitted in the back-to-back kinematics. The highly polarized 5_Lambda_He was abundantly produced with the (pi+,K+) reaction at 1.05GeV/c in the scattering angular range of +-15$ degrees. The obtained value alpha_p^NM=0.31+-0.22, as well as that for inclusive protons, alpha_p^NM=0.11+-0.08+-0.04, largely contradicts recent theoretical values of around -0.6, although these calculations well reproduce the branching ratios of non-mesonic weak decay.
dc.description4pages, 2 figures, submitted to Physical Review Letters
dc.identifierhttps://arxiv.org/abs/nucl-ex/0509016
dc.identifierhttp://arxiv.org/abs/nucl-ex/0509016
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/81349
dc.subjectNuclear Experiment
dc.titleExclusive proton asymmetry measurement in non-mesonic weak decay of polarized 5_Lambda_He
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