The A(K 12stop,\u3c0\ub1\u3a3 13)A reaction on p-shell nuclei
- 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. D\u2019Erasmo
- F.L. Fabbri
- A. Feliciello
- A. Filippi
- E.M. Fiore
- A. Fontana
- H. Fujioka
- P. Genova
- P. Gianotti
- N. Grion
- V. Lucherini
- S. Marcello
- N. Mirfakhrai
- F. Moia
- P. Montagna
- O. Morra
- T. Nagae
- H. Outa
- A. Pantaleo
- V. Paticchio
- S. Piano
- R. Rui
- G. Simonetti
- R. Wheadon
- A. Zenoni
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DOIAbstract
This Letter is concerned with the study of the K 12 stop A\u2192\u3c0\ub1 \u3a3 13 A reaction in p-shell nuclei, i.e., 6,7Li, 9Be, 13C and 16O. The \u3c0\ub1 \u3a3 13 /K 12 stop emission rates are reported as a function of A. These rates are discussed in comparison with previous findings. The ratio \u3c0 12 \u3a3 + /\u3c0+ \u3a3 12 in p-shell nuclei is found to depart largely from that on hydrogen, which provides support for large in-medium effects possibly generated by the sub-threshold \u39b(1405). The continuum momentum spectra of prompt pions and free sigmas are also discussed as well as the \u3c0\ub1 \u3a3 13 missing mass behavior and the link with the reaction mechanism. The apparatus used for the investigation is the FINUDA spect...