标题： 重夸克-轻子介子的交错手征微扰理论 显示英文标题

标题： Staggered Chiral Perturbation Theory for Heavy-Light Mesons

摘要： 我们将重轻介子纳入阶梯化手征微扰理论，在1/m_Q的领先阶进行研究，其中m_Q是重夸克质量。 在手征展开的第一个非平凡阶，阶梯化味破坏仅通过环中的轻介子传播子影响重轻量的的手征对数。 还有来自涉及重轻介子和轻介子的拉格朗日量中额外项的新解析贡献。 使用这种重轻阶梯化手征微扰理论，我们进行了部分消金和完整QCD情况下B（或D）介子轻子衰变常数的一环计算。 在我们的处理中，我们假设“第四根技巧”有效，以将四个阶梯化味减少为一个，并且假设通过在每个海夸克环中插入1/4因子来表示该技巧的方案在手征理论中有效。 显示英文摘要

摘要： We incorporate heavy-light mesons into staggered chiral perturbation theory, working to leading order in 1/m_Q, where m_Q is the heavy quark mass. At first non-trivial order in the chiral expansion, staggered taste violations affect the chiral logarithms for heavy-light quantities only through the light meson propagators in loops. There are also new analytic contributions coming from additional terms in the Lagrangian involving heavy-light and light mesons. Using this heavy-light staggered chiral perturbation theory, we perform the one-loop calculation of the B (or D) meson leptonic decay constant in the partially quenched and full QCD cases. In our treatment, we assume the validity both of the "fourth root trick" to reduce four staggered tastes to one, and of the prescription to represent this trick in the chiral theory by insertions of factors of 1/4 for each sea quark loop.