Study of the excited 1- charm and charm-strange mesons

We give a systematical study on the recently reported excited charm and charm-strange mesons with potential 1(-) spin-parity, including the D-s1*(2700)(+), D*(2860)(+), D-1*(2600)(0), D*(2650), D*(2680)(0) and D-s1* (2760)(0). The main strong decay properties are obtained in the framework of Bethe-Salpeter (BS) methods. Our results reveal that the two 1(-) charm-strange mesons can be well described by the further 2(3)S(1)-1(3)D(1) mixing scheme with a mixing angle of (8.7(-3.2)(+3.9))degrees. The predicted decay ratio B(D*K)/B(D K) for D-s1*(2860) is 0.62(-0.12)(+0.22). D*(2600)(0) can also be explained as the 23S1 predominant state with a mixing angle of -(7.5(-3.3)(+4.0))degrees. Considering the mass range, D*(2650)(0) and D-1*(2680)(0) are more likely to be the 2(3)S(1) predominant states, although the total widths under the two 2(3)S(1) and 1(3)D(1) assignments have no great conflict with the current experimental data. The calculated width for the LHCb D-1*(2760)(0) seems to be about 100 MeV larger than the experimental measurement if taking it as 1(3)D(1) or 1(3)D(1) dominant state c (u) over bar. The comparisons with other calculations and several important decay ratios are also presented. For the identification of these 1(-) charm mesons, further experimental information, such as B(D pi)/B(D*pi), is necessary.