Observation of New Narrow D_s states

Details Observation of New Narrow D_s states Observation of New Narrow D_s states

2003-09-08

arxiv.org/abs/hep-ex/0309028v2

ECONF C030626:SAAT01,2003

Physics

High Energy Physics

High Energy Physics - Experiment

Invited talk at the XXIII Physics in Collisions Conference (PIC03), Zeuthen, Germany, June 2003, 12 pages, LaTeX, 9 figures. P

Scientific paper

The BABAR experiment has discovered a new narrow state, D^*_{sJ}(2317)^+, near 2.32 GeV in the inclusive D_s^+ pi^0 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)^+ pi^0 mass spectrum. These discoveries have triggered several experiments in a search for new states coupled to the D_s^+ meson which confirmed the existence of D^*_{sJ}(2317)^+ together with D_{sJ}(2458)^+ --> D^*_s(2112)^+ pi^0 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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