Eur Phys J C (2004) 33: s219-s222
https://doi.org/10.1140/epjcd/s2004-03-1785-7

PS01 Heavy Flavour Physics

The new narrow “D _s ” states – A minireview

Lauritsen Laboratory of Physics 356-48, California Institute of Technology, Pasadena, CA 91125,  

Received: 9 October 2003
Accepted: 9 March 2004
Published online: 19 March 2004

Abstract

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.

PACS: 14.40.Lb Charmed mesons – 13.66.Bc Hadron production in e-e+ interactions