标题： 重轻介子在QCD中 显示英文标题

标题： Heavy-light mesons in QCD

摘要： 本演讲总结了使用QCD谱求和规则(QSSR)在[1]中对重轻\bar Qq开奇夸克和底夸克介子动力学的研究，并受到最近实验发现D{sJ}(2317)和D{sJ}(2457)介子的启发。强调了手征凝聚<\bar \psi \psi >在标量-赝标量介子质量分裂中的重要作用。 运行的奇夸克质量的新兴价值用于再现著名的 D(0-) 和 Ds(0-) 质量为：mc(mc)=1.13^{+0.08}_{-0.04} GeV，这证实了来自此通道的先前估计[2]。 使用此值，求和规则给出：M{Ds(0+)}= (2297+- 113) MeV，并且 SU(3) 破裂很小： M{Ds{(0+)}}-M{D{(0+)}}= 25 MeV. 将分析扩展到B系统，我们发现 M{B(0+)}- M{B(0-)}= (422+- 196) MeV = M{Ds(0^+)}-M{Ds(0-)}. 假设质量分裂的近似（重味和轻味）味和自旋对称性如前所示，还可以得出 M{D*s(1+)}= (2440+- 113) MeV. 最后，还可以得到：f{D(0+)}= (217+- 25) MeV 比 f\pi=130.6 MeV 大得多，表明存在对 1/sqrt{M_D}标度的较大违背，而 SU(3) 破坏比值 f{Ds(0+)}/f{D(0+)}= 0.93+- 0.02 与约 1.14 的 0^- 通道相反。 显示英文摘要

摘要： This talk summarizes the study of the dynamics of the heavy-light \bar Qq open charm and beauty mesons obtained in [1] using QCD spectral sum rules (QSSR) and motivated by the recent experimental discovery of the D{sJ}(2317) and D{sJ}(2457) mesons. The important r\^ole of the chiral condensate <\bar\psi\psi> in the mass-splittings between the scalar-pseudoscalar mesons is emphasized. The emerging value of the running charm quark mass for reproducing the well-known D(0-) and Ds(0-) masses is: mc(mc)=1.13^{+0.08}_{-0.04} GeV, which confirms previous estimates from this channel [2]. Using this value, the sum rules give: M{Ds(0+)}= (2297+- 113) MeV, and a small SU(3) breaking: M{Ds{(0+)}}-M{D{(0+)}}= 25 MeV. Extending the analysis to the B-system, we find M{B(0+)}- M{B(0-)}= (422+- 196) MeV = M{Ds(0^+)}-M{Ds(0^-)}. Assuming an approximate (heavy and light) flavour and spin symmetries of the mass-splittings as indicated by the previous results, one also deduces M{D*s(1+)}= (2440+- 113) MeV. Finally, one also gets: f{D(0+)}= (217+- 25) MeV much bigger than f\pi=130.6 MeV, suggesting a large violation of the 1/sqrt{M_D} scaling, while the size of the SU(3) breaking ratio f{Ds(0+)}/f{D(0+)}= 0.93+- 0.02 is opposite to the one of the 0^- channel of about 1.14.