arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2102.02854hep-th
收藏

限制与物质耦合的规范理论中的圈展开

Restricting loop expansions in gauge theories coupled to matter

F. T. Brandt, J. Frenkel, S. Martins-Filho, D. G. C. McKeon

AI总结:

本文利用拉格朗日乘子场约束场构型,证明与标量物质耦合的 YM/EH 规范理论可将圈修正限制至单圈,同时保持可重整化、幺正性和正能谱。

摘要:

对任何使用拉格朗日乘子(LM)场将场构型限制为满足经典运动方程的模型进行量子化,至多会产生单圈辐射修正。该方法可同时用于 Yang-Mills(YM)作用量和 Einstein-Hilbert(EH)作用量;所得理论既可重整化又具有幺正性,拥有正能谱,并且不存在对物理过程有贡献的负范数态。尽管这种方法不能自洽地单独用于标量场,但标量场可以与规范场耦合,从而使规范扇区中的圈效应被限制在单圈阶,同时满足自洽量子场论的通常判据。其树图即为度规与能量-动量张量耦合的经典理论的树图。

英文摘要:

Quantizing any model in which a Lagrange multiplier (LM) field is used to restrict field configurations to those that satisfy the classical equations of motion, leads to at most one-loop radiative corrections. This approach can be used with both the Yang-Mills (YM) and Einstein-Hilbert (EH) action; the resulting theory is both renormalizable and unitary, has a positive energy spectrum and has no negative norm states contributing to physical processes. Although this approach cannot be consistently used with scalar fields alone, scalar fields can be coupled to gauge fields so that loop effects in the gauge sector are restricted to one-loop order in a way that satisfies the usual criterion for a consistent quantum field theory. The tree-level diagrams are those of the classical theory in which the metric couples to the energy-momentum tensor.

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。

↑