你能走多远？三味手性外推的意外和陷阱
How far can you go ? Surprises and pitfalls in three-flavour chiral extrapolations
摘要：
奇异海夸克对的存在可能会对手征对称性破缺的模式产生重大影响：特别是在两种和三种无质量味的手征极限之间可能会出现很大的差异（即，$m_s$是保持在其物理值还是被发送到零）。我们回想起QCD中这种情况的一些迹象，与标量部门的特殊动力学有关。我们解释了这可能会影响收敛的三味手性系列，通常用于外推晶格模拟的结果。最后，我们指出如何晶格模拟与三个动力学的味道可以揭示这样的效果，通过轻介子质量和衰变常数的夸克质量依赖。
英文摘要：
The presence of strange sea quark pairs may have a significant impact of the pattern of chiral symmetry breaking : in particular large differences can occur between the chiral limits of two and three massless flavours (i.e., whether $m_s$ is kept at its physical value or sent to zero). We recall some indications of such a scenario in QCD, in relation with the peculiar dynamics of the scalar sector. We explain how this could affect the convergence of three-flavour chiral series, commonly used to extrapolate the results of lattice simulations. Finally, we indicate how lattice simulations with three dynamical flavours could unveil such an effect through the quark-mass dependence of light meson masses and decay constants.
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