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An improved determination of the two--nucleon induced non mesonic weak decay of $\Lambda$-hypernuclei
The decay of $\Lambda$-hypernuclei without pion emission, known as Non Mesonic Weak Decay (NMWD), gives an effective tool to investigate $\Delta$S=1 four-baryon interactions. It was theoretically suggested that the two-nucleon induced mechanism could play a substantial role in reproducing the observ...
| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
2011
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| Materias: | |
| Acceso en línea: | http://cds.cern.ch/record/1324367 |
| _version_ | 1780921624010162176 |
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| author | Agnello, M. Benussi, L. Bertani, M. Bhang, H.C. Bonomi, G. Botta, E. Bregant, M. Bressani, T. Bufalino, S. Busso, L. Calvo, D. Camerini, P. Dalena, B. De mori, F. D'Erasmo, G. Fabbri, F.L. Feliciello, A. Filippi, A. Fiore, E.M. Fujioka, H. Genova, P. Gianotti, P. Grion, N. Lucherini, V. Marcello, S. Mirfakhrai, N. Moia, F. Montagna, P. Morra, O. Nagae, T. Outa, H. Pantaleo, A. Paticchio, V. Piano, S. Rui, R. Simonetti, G. Wheadon, R. Zenoni, A. Garbarino, G. |
| author_facet | Agnello, M. Benussi, L. Bertani, M. Bhang, H.C. Bonomi, G. Botta, E. Bregant, M. Bressani, T. Bufalino, S. Busso, L. Calvo, D. Camerini, P. Dalena, B. De mori, F. D'Erasmo, G. Fabbri, F.L. Feliciello, A. Filippi, A. Fiore, E.M. Fujioka, H. Genova, P. Gianotti, P. Grion, N. Lucherini, V. Marcello, S. Mirfakhrai, N. Moia, F. Montagna, P. Morra, O. Nagae, T. Outa, H. Pantaleo, A. Paticchio, V. Piano, S. Rui, R. Simonetti, G. Wheadon, R. Zenoni, A. Garbarino, G. |
| author_sort | Agnello, M. |
| collection | CERN |
| description | The decay of $\Lambda$-hypernuclei without pion emission, known as Non Mesonic Weak Decay (NMWD), gives an effective tool to investigate $\Delta$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 $\Gamma_{2N}$/$\Gamma_{NMWD}$=0.24$\pm |
| id | cern-1324367 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2011 |
| record_format | invenio |
| spelling | cern-13243672023-03-14T17:33:48Zhttp://cds.cern.ch/record/1324367engAgnello, M.Benussi, L.Bertani, M.Bhang, H.C.Bonomi, G.Botta, E.Bregant, M.Bressani, T.Bufalino, S.Busso, L.Calvo, D.Camerini, P.Dalena, B.De mori, F.D'Erasmo, G.Fabbri, F.L.Feliciello, A.Filippi, A.Fiore, E.M.Fujioka, H.Genova, P.Gianotti, P.Grion, N.Lucherini, V.Marcello, S.Mirfakhrai, N.Moia, F.Montagna, P.Morra, O.Nagae, T.Outa, H.Pantaleo, A.Paticchio, V.Piano, S.Rui, R.Simonetti, G.Wheadon, R.Zenoni, A.Garbarino, G.An improved determination of the two--nucleon induced non mesonic weak decay of $\Lambda$-hypernucleiNuclear Physics - ExperimentThe decay of $\Lambda$-hypernuclei without pion emission, known as Non Mesonic Weak Decay (NMWD), gives an effective tool to investigate $\Delta$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 $\Gamma_{2N}$/$\Gamma_{NMWD}$=0.24$\pmThe decay of $\Lambda$-hypernuclei without pion emission, known as Non Mesonic Weak Decay (NMWD), gives an effective tool to investigate $\Delta$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 $\Gamma_{2N}$/$\Gamma_{NMWD}$=0.24$\pm {0.03_{stat}}^{+0.03_{sys}}_{{-{0.02_{sys}}}}$ has been deduced, with an error reduced by a factor more than two compared with the previous assessment.arXiv:1101.4481oai:cds.cern.ch:13243672011-01-25 |
| spellingShingle | Nuclear Physics - Experiment Agnello, M. Benussi, L. Bertani, M. Bhang, H.C. Bonomi, G. Botta, E. Bregant, M. Bressani, T. Bufalino, S. Busso, L. Calvo, D. Camerini, P. Dalena, B. De mori, F. D'Erasmo, G. Fabbri, F.L. Feliciello, A. Filippi, A. Fiore, E.M. Fujioka, H. Genova, P. Gianotti, P. Grion, N. Lucherini, V. Marcello, S. Mirfakhrai, N. Moia, F. Montagna, P. Morra, O. Nagae, T. Outa, H. Pantaleo, A. Paticchio, V. Piano, S. Rui, R. Simonetti, G. Wheadon, R. Zenoni, A. Garbarino, G. An improved determination of the two--nucleon induced non mesonic weak decay of $\Lambda$-hypernuclei |
| title | An improved determination of the two--nucleon induced non mesonic weak decay of $\Lambda$-hypernuclei |
| title_full | An improved determination of the two--nucleon induced non mesonic weak decay of $\Lambda$-hypernuclei |
| title_fullStr | An improved determination of the two--nucleon induced non mesonic weak decay of $\Lambda$-hypernuclei |
| title_full_unstemmed | An improved determination of the two--nucleon induced non mesonic weak decay of $\Lambda$-hypernuclei |
| title_short | An improved determination of the two--nucleon induced non mesonic weak decay of $\Lambda$-hypernuclei |
| title_sort | improved determination of the two--nucleon induced non mesonic weak decay of $\lambda$-hypernuclei |
| topic | Nuclear Physics - Experiment |
| url | http://cds.cern.ch/record/1324367 |
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