Observation of New Narrow Ds states
Abstract
The BABAR experiment has discovered a new narrow state, D*sJ(2317)+, near 2.32 GeV in the inclusive Ds+ pi0 invariant mass distribution from e+e- annihilation data at energies near 10.6 GeV. The same experiment has also shown evidence for structure in the 2.46 GeV region in the D*s(2112)+ pi0 mass spectrum. These discoveries have triggered several experiments in a search for new states coupled to the Ds+ meson which confirmed the existence of D*sJ(2317)+ together with DsJ(2458)+ --> D*s(2112)+ pi0 both in inclusive e+ e- annihilation and in B decays. These two new states are difficult to explain in terms of potential models.
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