Neutron–proton coincidences from Non-Mesonic Weak Decay of p-shell Λ-hypernuclei and determination of the two-nucleon induced process
Academic Article
Publication Date:
2011
abstract:
The decay of Λ-hypernuclei without π emission, known as Non-Mesonic Weak Decay (NMWD), gives an effective tool to investigate S = 1 four-baryon interactions. It was theoretically suggested that the two-nucleon induced mechanism could play a substantial role in reproducing the observed NMWD decay
rates and nucleon spectra, but at present no direct evidence of such a mechanism has been obtained.
The FINUDA experiment, exploiting the possibility to detect both charged and neutral particles coming from the hypernucleus decay, has allowed us to deduce the relative weight of the two nucleon induced decay rate to the total NMWD rate. The value of Γ2N/ΓNMWD = 0.21 ± 0.07stat+0.03sys−0.02sys
has been deduced, well consistent with the previous determinations.
Iris type:
1.1 Articolo in rivista
Keywords:
Λ-hypernuclei; Non-mesonic weak decay; Two nucleon induced decay
List of contributors:
M., Agnello; L., Benussi; M., Bertani; H. C., Bhang; G., Bonomi; E., Botta; M., Bregant; T., Bressani; S., Bufalino; L., Busso; D., Calvo; P., Camerini; B., Dalena; F., De Mori; G., Dʼerasmo; F. L., Fabbri; A., Feliciello; A., Filippi; E. M., Fiore; H., Fujioka; Genova, Pablo; P., Gianotti; N., Grion; V., Lucherini; S., Marcello; N., Mirfakhrai; F., Moia; Montagna, PAOLO MARIA; O., Morra; T., Nagae; H., Outa; A., Pantaleo; V., Paticchio; S., Piano; R., Rui; G., Simonetti; R., Wheadon; A., Zenoni; G., Garbarino
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