New results on the limit for the width of the exotic Θ+ resonance

AbstractWe investigate the impact of the Θ+(1540) resonance on differential and integrated cross sections for the reaction K+d→K0pp, where experimental information is available at kaon momenta below 640MeV/c. The calculation utilizes the Jülich KN model and extensions of it that include contributions from a Θ+(1540) state with different widths. The evaluation of the reaction K+d→K0pp takes into account effects due to the Fermi motion of the nucleons within the deuteron and the final three-body kinematics. We conclude that the available data constrain the width of the Θ+(1540) to be less than 1 MeV