par Calicchio, Marco;Bertrand, Daniel 
;Marage, Pierre ;Moreels, J.;Sacton, Jean ;Vander Velde, Catherine ;Van Doninck, Walter;Wilquet, Gaston ; [et al.]
Référence Physics letters. Section B, 93, 4, page (521-524)
Publication Publié, 1980-06
;Marage, Pierre ;Moreels, J.;Sacton, Jean ;Vander Velde, Catherine ;Van Doninck, Walter;Wilquet, Gaston ; [et al.]Référence Physics letters. Section B, 93, 4, page (521-524)
Publication Publié, 1980-06
Article révisé par les pairs
| Résumé : | An event with the decay chain Σc+ → Λc+ + π0, Λc+ → K- + p + π+, has been observed in an exposure of BEBC, equipped with a track sensitive target, to the wide band neutrino beam from the SPS at CERN. The event has a unique three constraint kinematic fit to the ΔS = -ΔQ reaction v + p → μ- + p + K- + π+ + π+ + π0 with both gammas from the π0 decay detected. The proton and other final state particles are identified. The masses are M(Λc+) = 2290 ± 3 MeV/c2, M(Σc+) = 2457 ± 4 MeV/c2 and M(Σc+) - M(Λc+) = 168 ± 3 MeV/c2. Including other data one obtains M (Σc++) - M(Σc+) = 0 ± 4 MeV/c2. © 1980. |
