基态张量介子及其轨道激发态研究

Study of Tensor Mesons and Its Orbital Excited States

利用Regge唯象学,首先计算了基态张量介子多重态中奇异偶素ss、粲-底介子B*c2的质量,然后计算了张量介子的Regge轨迹和斜率,最后给出了轨道激发态13F4,13H6和13K8介子九重态的质量.实验结果表明,可将fJ(2 220)和X(2 710)分别作为f'4(13F4)和f'6(13H6)的候选态进行探究,建议实验上分别在6 785 Me V,2 595Me V能量附近寻找和研究尚未观测到的介子B*c2(13P2)和K*6(13H6).分别在2 095 Me V,1 969 Me V,2 498 Me V能量附近进一步研究K*4(2 045),f4(2 050),a6(2 450)的性质.结果对在实验上寻找尚未发现的介子和相关介子的自旋-宇称安排具有一定的理论指导意义.将来可以在LHCb、BES-III等实验装置中验证.

Based on the Regge phenomenology, masses of the pure strangenium ss- （13 P2 ） and the charm-bottom Bc2＊ （13p2 ） were calculated. Then, Regge parameters of the 13P2 muhiplet were given. Af- ter that, masses of the orbital excited 13 F, and 13H6 meson nonets were estimated. Based on the predic- tions, some related resonances were discussed. The fJ （2 220） and X（2 710） meson resonances could be further researched as the candidates for f 4 （ 13 F4 ） and f＇6 （ 13H6 ）, respectively. It was suggested to search Bc2＊ （13p2） and K6＊ （13H6） near 6 785 MeV and 2 595 MeV, respectively. It was suggested to re- study K4＊ （2 045）, f4 （2 050）, a6 （2 450） near the energy 2 095 MeV, 1 969 MeV, 2 498 MeV, re- spectively. The predictions may be useful guidance for the discovery of the unobserved excited mesons and the JP assignment of related states. The results could be tested at LHCb and BES-III in the near fu- ture.