We report on the study of charm baryons decaying to Λ+c: Λ*+c(2625) → Λ+cπ+π-(2593) → Λ+cπ+π-, Σ0c → Λ+cπ- and Σ++c → Λ+cπ+. We present a confirmation of the state Λ*+c (2593) and determine its mass difference to be M(Λ*+c(2593) ) - M(Λ+c) = 309.2 ± 0.7 ± 0.3 MeV/c2. We determine the lower limit on the resonant branching ratio to be BR(Λ*+c(2593) → Σcπ± (2593) → Λ+cπ+π- ) > 0.51 (90% c.l.). We also measure the mass differences W(Σ0c) - M(Λ+c ) = 166.6 ± 0.5 ± 0.6 MeV/c2 and M(Σ++c) - M(Λ+c) = 167.6 ± 0.6 ± 0.6 MeV/c2. Finally, we measure the relative photoproduction cross sections for Λ*+c and Σc with respect to the (inclusive) photoproduction cross section for Λ+c.
|Original language||English (US)|
|Number of pages||9|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - Jan 4 1996|
ASJC Scopus subject areas
- Nuclear and High Energy Physics