Author/Authors :
FINUDA Collaboration، نويسنده , , M. Agnello، نويسنده , , G. Beer، نويسنده , , L. Benussi، نويسنده , , M. Bertani، نويسنده , , H.C Bhang، نويسنده , , S. Bianco، نويسنده , , G. Bonomi، نويسنده , , E. Botta، نويسنده , , M. Bregant، نويسنده , , T. Bressani، نويسنده , , S. Bufalino، نويسنده , , L. Busso، نويسنده , , D. Calvo، نويسنده , , P. Camerini، نويسنده , , P. Cerello، نويسنده , , B. Dalena، نويسنده , , F. De Mori، نويسنده , , G. DʹErasmo، نويسنده , , D. Di Santo، نويسنده , , et al.، نويسنده ,
Abstract :
Momenta spectra of protons emitted following the capture of K− in 6Li and 12C have been measured with 1% resolution. The 12C spectrum is smooth whereas for 6Li a well defined peak appears at about 500 MeV/c. The first observation of a structure in this region was identified as a strange tribaryon or, possibly, a View the MathML source-nuclear state. The peak is correlated with a π− coming from Σ− decay in flight, selected by setting the π momentum larger than 275 MeV/c. The Σ− could be produced, together with a 500 MeV/c proton, by the capture of a K− in a deuteron-cluster substructure of the 6Li nucleus. The capture rate for such a reaction is View the MathML source, in agreement with the existing observations on 4He targets and with the hypothesis that the 6Li nucleus can be interpreted as a (d+α) cluster.
Keywords :
K? induced reaction in nuclei , FINUDA experiment , Proton inclusive spectra , Deeply bound K?-nucleons states
