Explaining the Ds(2317)

Abstract

The recently observed Ds(2317) meson is explained as a scalar c+anti-s system which appears as a bound state pole, below threshold, in the DK scattering amplitude. The standard c+anti-s charmed scalar D_{s0} is found at about 2.9 GeV, with a width of some 150 MeV. For the scattering length of DK in S wave we predict 5+-1 1/GeV.

Comments: Talk given at The 25th annual Montreal-Rochester-Syracuse-Toronto Conference on High-Energy Physics, Joefest, in the honor of the 65th birthday of Joseph Schechter, May 13 - 15, 2003, Syracuse (NY); 14 pages + 7 figures