Observation of Two Excited Charmed Baryons Decaying into Λ+cπ±
Brandenburg, G.; Briere, R.A.; Kim, D.Y.; Liu, T.; Saulnier, M.; Wilson, R.; Yamamoto, H.; Browder, T.E.; Li, F.; Li, Y.; Rodriguez, J.L.; Bergfeld, T.; Eisenstein, B.I.; Ernst, J.; Gladding, G.E.; Gollin, G.D.; Johnson, E.; Karliner, I.; Palmer, M.; Selen, M.; Thaler, J.J.; Edwards, K.W.; Bellerive, A.; Britton, D.I.; Janicek, R.; MacFarlane, D.B.; McLean, K.W.; Patel, P.M.; Sadoff, A.J.; Ammar, R.; Baringer, P.; Bean, A.; Besson, D.; Coppage, D.; Darling, C.; Davis, R.; Hancock, N.; Kotov, S.; Kravchenko, I.; Kwak, N.; Anderson, S.; Kubota, Y.; Lattery, M.; ONeill, J.J.; Patton, S.; Poling, R.; Riehle, T.; Smith, A.; Savinov, V.; Alam, M.S.; Athar, S.B.; Ling, Z.; Mahmood, A.H.; Severini, H.; Timm, S.; Wappler, F.; Anastassov, A.; Blinov, S.; Duboscq, J.E.; Fulton, R.; Fujino, D.; Gan, K.K.; Hart, T.; Honscheid, K.; Kagan, H.; Kass, R.; Lee, J.; Sung, M.; Undrus, A.; Wanke, R.; Wolf, A.; Zoeller, M.M.; Nemati, B.; Richichi, S.J.; Ross, W.R.; Skubic, P.; Wood, M.; Bishai, M.; Fast, J.; Gerndt, E.; Hinson, J.W.; Miller, D.H.; Shibata, E.I.; Shipsey, I.P.; Yurko, M.; Gibbons, L.; Johns.1997
AbstractAbstract
[en] Using data recorded by the CLEO-II detector at CESR, we report evidence of a pair of excited charmed baryons, one decaying into Λ+cπ+ and the other into Λ+cπ-. The doubly charged state has a measured mass difference M(Λ+cπ+) -M(Λ+c) of 234.5±1.1±0.8 MeV/c2 and a width of 17.9+3.8-3.2±4.0MeV/c2, and the neutral state has a measured mass difference M(Λ+cπ-) -M(Λ+c) of 232.6±1.0±0.8 MeV/c2 and a width of 13.0+3.7-3.0±4.0MeV/c2. We interpret these data as evidence of the Σ*++c and Σ*0c, the spin (3)/(2)+ excitations of the Σc baryons. copyright 1997 The American Physical Society
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