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arXiv 1012.4662gr-qchep-th
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Yang-Mills理论中的准定域荷和Newman-Penrose型量

On quasi-local charges and Newman--Penrose type quantities in Yang--Mills theories

Réka Farkas, László B Szabados

摘要:

本文将P. Tod对具有酉群的杨-米尔斯场引入的准定域荷概念推广到具有任意规范群的非阿贝尔规范理论,并计算了它在空间无穷远和零无穷远的小球极限和大球极限.我们表明,半简单的规范群没有合理的定义产生守恒的总电荷和纽曼-彭罗斯(NP)型量在零无限的一般,辐射配置。阐明了它们在场组态和规范群结构方面的守恒条件。我们还计算了NP数量的固定,渐近解的场方程与消失的磁荷,并说明这些明确的解决方案与各种规范组。

英文摘要:

We generalize the notion of quasi-local charges, introduced by P. Tod for Yang--Mills fields with unitary groups, to non-Abelian gauge theories with arbitrary gauge group, and calculate its small sphere and large sphere limits both at spatial and null infinity. We show that for semisimple gauge groups no reasonable definition yield conserved total charges and Newman--Penrose (NP) type quantities at null infinity in generic, radiative configurations. The conditions of their conservation, both in terms of the field configurations and the structure of the gauge group, are clarified. We also calculate the NP quantities for stationary, asymptotic solutions of the field equations with vanishing magnetic charges, and illustrate these by explicit solutions with various gauge groups.

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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