Baryonic resonances close to the Kbar-N threshold: the case of   Sigma(1385)^+ in pp collisions
  We present results of an exclusive measurement of the first excited state of the Sigma hyperon, Sigma(1385)^+, produced in p+p -> Sigma^+ + K^+ + n at 3.5 GeV beam energy. The extracted data allow to study in detail the invariant mass distribution of the Sigma(1385)^+. The mass distribution is well described by a relativistic Breit-Wigner function with a maximum at m_0 = 1383.2 +- 0.9 MeV/c^2 and a width of 40.2 +- 2.1 MeV/c^2. The exclusive production cross-section comes out to be 22.27 +- 0.89 +- 1.56 +3.07 -2.10 mu b. Angular distributions of the Sigma(1385)^+ in different reference frames are found to be compatible with the hypothesis that 33 % of Sigma(1385)^+ result from the decay of an intermediate Delta^{++} resonance. 
G.Agakishiev, A.Balanda, D.Belver, A.V.Belyaev, A.Blanco, M.Boehmer,   J.L.Boyard, P.Cabanelas, E.Castro, J.C. Chen, S.Chern...
nucl-ex