Mass spectra and strong decays of charmed and charmed-strange mesons

A semirelativistic potential model is adopted to calculate the mass spectra of charmed and charmed-strange meson states up to the 2D excitations. The strong decay properties are further analyzed with a chiral quark model by using the numerical wave functions obtained from the potential model. By using the strong decay amplitudes extracted from the chiral quark model, we also systematically study the coupled-channel effects on the bare masses of the 1P-wave states, since the masses of D-s0* (2317) and D-s1(2460) cannot be explained with bare 1P-wave states within the potential model. Based on our good descriptions of the mass and decay properties for the low-lying well-established states, we give a quark model classification for the high-mass resonances observed in recent years. In the D-meson family, D-0(2550) can be classified as the radially excited state D(2(1)S(0)), D-3*(2750) and D-2 (2740) can be classified as the second orbital excitations D(1(3)D(3)) and D (1D'(2)) , respectively, D-J(3000) may be a candidate of D (1(3)F(4)) or D(2(3)P(2)), while D-J (3000) may favor the high-mass mixed state D(2P'(1)); however, there are still puzzles in our understanding of the nature of D-1*(2600) and D-1*(2760), whose decay properties cannot be well explained with either pure D(2(3)S(1)) and D(1(3)D(1)) states or their mixing. In the D-s -meson family, D:(s3)* (2860) favors the D-s(1(3)D(3)) assignment, D-s1* (2700) and D-s1* (2860) may favor the mixed states vertical bar(SD)(1)>(L) and vertical bar(SD)(1)>(H) via the 2(3)S(1)-1(3)D(1) mixing, respectively, D-sJ(3040) may favor D-s (2P(1)) or D-s(2P'(1)), or correspond to a structure contributed by both D-s (2P(1)) and D-s (2P'(1)), the newly observed resonance D-s0 (2590)(+) as an assignment of D s (2 1 4), by including coupled-channel effects the mass of D-s(2(1)S(0)) is close to the observed value; however, the width cannot be well understood in the present study. Many missing excited D- and D-s -meson states have a relatively narrow width and they are most likely to be observed in their dominant decay channels in future experiments.

Automated summary

The mass spectra of charmed and charmed-strange meson states are calculated using a semirelativistic potential model. The strong decay properties are analyzed using a chiral quark model. The paper provides a quark model classification for high-mass resonances and discusses the nature of certain observed meson states.