Strong decays of heavy-light mesons in a chiral quark model
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 (China)
We carry out a systematic study of the heavy-light meson strong decays in a chiral quark model. For the S-wave vectors [D*(2007), D*{sup {+-}}(2010)], P-wave scalars [D{sub 0}*(2400), B{sub 0}*(5730)], and tensors [D{sub 2}*(2460), D{sub s2}*(2573)], we obtain results in good agreement with the experimental data. For the axial vectors D{sub 1}(2420) and D{sub 1}{sup '}(2430), a state mixing scheme between 1{sup 1}P{sub 1} and 1{sup 3}P{sub 1} is favored with a mixing angle {phi}{approx_equal}-(55{+-}5) deg., which is consistent with previous theoretical predictions. The same mixing scheme also applies to D{sub s1}(2460) and D{sub s1}(2536) that accounts for the narrow width of the D{sub s1}(2536) and its dominant decay into D*K. For B{sub 1}(5725) and B{sub 1}{sup '}(5732), such a mixing explains well the decay width of the former but leads to an even broader B{sub 1}{sup '}(5732). Predictions for the strange-bottom axial vectors are also made. For the undetermined meson D*(2640), we find that they fit well in the radially excited state 2{sup 3}S{sub 1} according to its decay mode. The newly observed D{sub sJ}*(2860) strongly favors the D-wave excited state 1{sup 3}D{sub 3}. For D{sub sJ}*(2632) and D{sub sJ}*(2690), we find they are difficult to fit in any D{sub s} excitations in that mass region, if the experimental data are accurate. Theoretical predictions for decay modes of those unobserved states as multiplets of 2S and 1D waves are also presented, which should be useful for the further experimental search for those states.
- OSTI ID:
- 21250235
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 78, Issue 1; Other Information: DOI: 10.1103/PhysRevD.78.014029; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Quasibound states in the continuum: A dynamical coupled-channel calculation of axial-vector charmed mesons
Study of D$^{sJ}_{(*)+}$ mesons decaying to D*+ K$_{0}^{S}$ and D*0 K+ final states