First determination of the one-proton induced Non-Mesonic Weak Decay width of p-shell {\Lambda}-Hypernuclei
| Autor: | Agnello, M., Benussi, L., Bertani, M., Bhang, H. C., Bonomi, G., Botta, E., Bressani, T., Bufalino, S., Calvo, D., Camerini, P., Dalena, B., De Mori, F., Erasmo, G. D, Feliciello, A., Filippi, A., Fujioka, H., Gianotti, P., Grion, N., Lucherini, V., Marcello, S., Nagae, T., Outa, H., Paticchio, V., Piano, S., Rui, R., Simonetti, G., Zenoni, A. |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Phys. Lett. B 738 (2014) 499 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.physletb.2014.10.024 |
| Popis: | Previous studies of proton and neutron spectra from Non-Mesonic Weak Decay of eight Lambda-Hypernuclei (A = 5-16) have been revisited. New values of the ratio of the two-nucleon and the one-proton induced decay widths, Gamma_2N/Gamma_p, are obtained from single proton spectra, Gamma_2N/Gamma_p = 0.50 +/- 0.24, and from neutron and proton coincidence spectra, Gamma_2N/Gamma_p = 0.36 +/- 0.14stat +0.05sys -0.04sys , in full agreement with previously published ones. With these values, a method is developed to extract the one-proton induced decay width in units of the free Lambda decay width, Gamma_p/Gamma_Lambda, without resorting to Intra Nuclear Cascade models but by exploiting only experimental data, under the assumption of a linear dependence on A of the Final State Interaction contribution. This is the first systematic determination ever done and it agrees within the errors with recent theoretical calculations. Comment: 16 pages, 3 figures, 2 tables |
| Databáze: | arXiv |
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