Pi-mesonic decay of the hypertriton

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dc.creatorKamada, H.
dc.creatorGolak, J.
dc.creatorMiyagawa, K.
dc.creatorWitala, H.
dc.creatorGloeckle, W.
dc.date1997-09-17
dc.date.accessioned2026-07-07T11:11:22Z
dc.date.available2026-07-07T11:11:22Z
dc.descriptionThe pi-mesonic decay of the hypertriton is calculated based on a hypertriton wavefunction and 3N scattering states, which are rigorous solutions of 3-body Faddeev equations using realistic NN and hyperon-nucleon interactions. The total pi-mesonic decay rate is found to be 92% of the free Lambda decay rate, which is close to the experimental data. Together with the nonmesonic decay the total life time of 3Lambda H is predicted to be 2.78 x 10^-10 sec which is 6 % larger than for the free Lambda particle. The differential decay rate is evaluated as a function of the pion momentum. The decay into the N+d+pi channel is stronger than in the 3N+pi channel in contrast to the situation for the nonmesonic decay. The ratio for the decay rate into 3He + pi^- to the decay rate into all channels including pi^- is found to be 0.40, which is close to the experimental value. We visualise the decay into the dominant channel p+d+pi^- in a Dalitz plot. Finally we compare the polarisation of the outgoing proton in free unpolarised Lambda-decay to the polarisation of 3He in unpolarised 3_Lambda H-decay and we compare the closely related asymmetry of pi^- emitted parallel and antiparallel with respect to the spin-direction for a polarised Lambda to the corresponding asymmetry for a polarised 3_Lambda H.
dc.description19pages, REVTeX, 9fugures
dc.identifierhttps://arxiv.org/abs/nucl-th/9709035
dc.identifierhttp://arxiv.org/abs/nucl-th/9709035
dc.identifierPhys.Rev.C57:1595-1603,1998
dc.identifierdoi:10.1103/PhysRevC.57.1595
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/191071
dc.subjectNuclear Theory
dc.titlePi-mesonic decay of the hypertriton
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