The New Narrow "D_s" States -- A Minireview

Details The New Narrow "D_s" States -- A Minireview The New Narrow "D_s" States -- A Minireview

2003-12-04

arxiv.org/abs/hep-ex/0312019v2

Eur.Phys.J.C33:s219-s222,2004

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, 10 figures LaTeX; To appear in Proceedings of the International Europhysics Conference on High Energy Physics, July 1

Scientific paper

10.1140/epjcd/s2004-03-1785-7

The experimental status concerning the two new narrow states with charm-strange content is reviewed. The states have masses of 2317 and 2460 MeV, widths less than 10 MeV, isospin consistent with zero, and spin-parities consistent with being 0^+ and 1^+, respectively. Although the masses are lower than the conventional expectation, these states appear to be the j=1/2 P-wave levels of the D_s system, where j is the light quark angular momentum; there may be mixing with the j=3/2 level for the 1^+ state.

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