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arXiv 0706.0955hep-ph
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ChPT中奇异夸克的积分

Integrating out strange quarks in ChPT

Jurg Gasser, Christoph Haefeli, Mikhail A. Ivanov, Martin Schmid

摘要:

本文研究了奇异夸克质量远大于外动量和上下夸克质量,外场为二味手征微扰理论的三味手征微扰理论。在这种情况下,理论简化为SU(2)_L × SU(2)_R。通过这种约化,我们可以计算出在双味情况下LEC的奇异夸克质量依赖性。本文给出了F,B和l_i的双环阶关系式。

英文摘要:

We study three flavour chiral perturbation theory in a limit where the strange quark mass is much larger than the external momenta and the up and down quark masses, and where the external fields are those of two-flavour chiral perturbation theory. In this case, the theory reduces to the one of SU(2)_L x SU(2)_R. Through this reduction, one can work out the strange quark mass dependence of the LECs in the two-flavour case. We present the pertinent relations at two-loop order for F,B and l_i.

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。

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