Archivio Istituzionale della RicercaThis Letter is concerned with the study of the K(stop)(-)A -> pi(+/-)Sigma(-/+)A ' reaction in p-shell nuclei, i.e., (6.7)Li, (9)Be, (13)C and (16)O. The pi(+/-)Sigma(-/+)/K(stop)(-) emission rates are reported as a function of A. These rates are discussed in comparison with previous findings. The ratio pi(-)Sigma(+)/pi(+)Sigma(-) 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 Lambda(1405). The continuum momentum spectra of prompt pions and free sigmas are also discussed as well as the pi(+/-)Sigma(-/+) missing mass behavior and the link with the reaction mechanism. The apparatus used for the investigation is the FINUDA spectrometer operating at the DA Phi NE phi-factory (LNF-INFN, Italy). (C) 2011 Elsevier B.V. All rights reserved.
The A(K(stop)(-), pi(+/-)Sigma(-/+))A ' reaction on p-shell nuclei / Agnello, Michelangelo; Benussi, L.; Bertani, M.; Bhang, H. C.; Bonomi, G.; Botta, E.; Bregant, M.; Bressani, T.; Bufalino, Stefania; Busso, L.; Calvo, D.; Camerini, P.; Dalena, B.; De Mori, F.; D'Erasmo, G.; Fabbri, F. L.; Feliciello, A.; Filippi, A.; Fiore, E. M.; Fontana, A.; Fujioka, H.; Genova, P.; Gianotti, P. .; Grion, N.; Lucherini, V.; Marcello, S.; Mirfakhrai, N.; Moia, F.; Montagna, R.; Morra, O.; Nagae, T.; Outa, H.; Pantaleo, A.; Paticchio, V.; Piano, S.; Rui, R.; Simonetti, G.; Wheadon, R.; Zenoni, A.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 704:5(2011), pp. 474-480. [10.1016/j.physletb.2011.09.076]
The A(K(stop)(-), pi(+/-)Sigma(-/+))A ' reaction on p-shell nuclei
AGNELLO, MICHELANGELO;BUFALINO, STEFANIA;
2011
Abstract
This Letter is concerned with the study of the K(stop)(-)A -> pi(+/-)Sigma(-/+)A ' reaction in p-shell nuclei, i.e., (6.7)Li, (9)Be, (13)C and (16)O. The pi(+/-)Sigma(-/+)/K(stop)(-) emission rates are reported as a function of A. These rates are discussed in comparison with previous findings. The ratio pi(-)Sigma(+)/pi(+)Sigma(-) 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 Lambda(1405). The continuum momentum spectra of prompt pions and free sigmas are also discussed as well as the pi(+/-)Sigma(-/+) missing mass behavior and the link with the reaction mechanism. The apparatus used for the investigation is the FINUDA spectrometer operating at the DA Phi NE phi-factory (LNF-INFN, Italy). (C) 2011 Elsevier B.V. All rights reserved.
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https://hdl.handle.net/11583/2496866
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