ChPT在重轻系统中的使用和误用
Use and misuse of ChPT in the heavy-light systems
摘要：
我们讨论了ChPT应用于重-轻介子系统时的有效性范围。考虑到最近的实验证据表明，根据重轻标量和轴向状态比预期的更接近基态，我们重新审视了B-Bbar混合振幅的手征行为的预测，并检查了接近的正宇称态的影响。我们的结论是，标准的ChPT表达式与Nf=3轻的味道是没有用的，在引导外推的晶格上计算的强子量。相反，在Nf=2的HMChPT中得到的那些，即，包括π介子环，只要它们应用于小于350 MeV的π介子，或小于物理奇异夸克质量的三分之一的夸克，仍然是足够的。
英文摘要：
We discuss the range of validity of ChPT when applied to the systems of heavy-light mesons. Having in mind the recent experimental evidence according to which the heavy-light scalar and axial states are closer to the ground states than anticipated, we revisited the prediction for the chiral behavior of the B-Bbar mixing amplitude and examined the impact of nearness of the positive parity states. We conclude that the standard ChPT expressions with Nf=3 light flavours are not useful in guiding the extrapolation of hadronic quantities computed on the lattice. Instead those derived in HMChPT with Nf=2, i.e., including only the pion loops, are still adequate as long as they are applied to the pions lighter than 350 MeV, or the quarks lighter than a third of the physical strange quark mass.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
