Structure of the nucleon in chiral perturbation theory

Structure of the nucleon in chiral perturbation theory
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手性微扰理论中的核子结构

DOI:
10.1140/epjad/s2004-03-006-0
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发表时间:
2003
期刊:
The European Physical Journal A - Hadrons and Nuclei
影响因子:
--
通讯作者:
Stefan Scherer
Stefan Scherer
中科院分区:
--
文献类型:
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作者:
Thomas Fuchs;J. Gegelia;Stefan Scherer

文献摘要

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摘要:我们讨论了相对论重子手征微扰理论的重整化方案,它为重整化图提供了一个简单而一致的功率计数。该方法涉及在手征微扰理论的标准修正的最小相减方案之外,对尺寸正则化图进行有限相减,以去除违反幂计数的贡献。这是通过对最一般的有效拉格朗日的参数进行适当的重整化来实现的。作为应用,我们讨论了核子的质量,σ项,以及标量和电磁形状因子。
Abstract.We discuss a renormalization scheme for relativistic baryon chiral perturbation theory which provides a simple and consistent power counting for renormalized diagrams. The method involves finite subtractions of dimensionally regularized diagrams beyond the standard modified minimal subtraction scheme of chiral perturbation theory to remove contributions violating the power counting. This is achieved by a suitable renormalization of the parameters of the most general effective Lagrangian. As applications we discuss the mass of the nucleon, the σ term, and the scalar and electromagnetic form factors.