Constraints on narrow exotic states from K+p and K0_Lp scattering data
  We consider the effect of exotic S=+1 resonances Theta+ and Theta++ on K+p elastic scattering data (total cross section) and the process K0_Lp-->K0_Sp. Data near the observed Theta+(1540) are examined for evidence of additional states. The width limit for a Theta++ state is reconsidered and shown to be much less than 1 MeV. 
R.L. Workman, R.A. Arndt, I.I. Strakovsky (GWU), D.M. Manley, J.   Tulpan (KSU)