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FINUDA Collaboration,Agnello, M.,Beer, G.,Benussi, L.,Bertani, M.,Bhang, H.C.,Bianco, S.,Bonomi, G.,Botta, E.,Bregant, M.,Bressani, T.,Bufalino, S.,Busso, L.,Calvo, D.,Camerini, P.,Caponero, M.,Cerell North-Holland Pub. Co 2007 Physics letters: B Vol.649 No.1
The inelastic charge exchange reaction (K<SUP>+</SUP>, K<SUP>0</SUP>) on <SUP>7</SUP>Li has been experimentally investigated close to threshold with the FINUDA spectrometer at the e<SUP>+</SUP>e<SUP>-</SUP> collider DAΦNE by searching for K<SUB>S</SUB><SUP>0</SUP> decays. It is the first time that this process has been studied at such low momentum. An upper limit of 2.0 mb (at 95% confidence level) has been measured for the total cross section.
Correlated Λd pairs from the K<sub>stop</sub><sup>-</sup>A->ΛdA<sup>'</sup> reaction
FINUDA Collaboration,Agnello, M.,Beer, G.,Benussi, L.,Bertani, M.,Bhang, H.C.,Bianco, S.,Bonomi, G.,Botta, E.,Bregant, M.,Bressani, T.,Bufalino, S.,Busso, L.,Calvo, D.,Camerini, P.,Caponero, M.,Cerell North-Holland Pub. Co 2007 Physics letters: B Vol.654 No.3
Correlated Λd pairs emitted after the absorption of negative kaons at rest K<SUB>stop</SUB><SUP>-</SUP>A->ΛdA<SUP>'</SUP> in light nuclei <SUP>6</SUP>Li and <SUP>12</SUP>C are studied. Λ-hyperons and deuterons are found to be preferentially emitted in opposite directions. The Λd invariant mass spectrum of <SUP>6</SUP>Li shows a bump whose mass is 3251+/-6 MeV/c<SUP>2</SUP>. The bump mass (binding energy), width and yield are reported. The appearance of a bump is discussed in the realm of the [K@?3N] clustering process in nuclei. The experiment was performed with the FINUDA spectrometer at DAΦNE (LNF).