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arXiv 2006.15947hep-phnucl-th
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用Nakanishi积分表示法求解Minkowski空间中的费米和光子能隙方程

Fermion and Photon gap-equations in Minkowski space within the Nakanishi Integral Representation method

Cédric Mezrag, Giovanni Salmè

摘要:

的方法的基础上的Nakanishi积分表示的n-腿过渡振幅的费米子和(IR调节)矢量玻色子的自能的治疗,以铺平道路,以建设一个全面的应用该技术的间隙和Bethe-Salpeter方程,在闵可夫斯基空间。所得到的结果,即一个6通道耦合系统的积分方程,最终允许一个确定的三个Källén-Lehman重量完全打扮的费米子和光子的传播子。还提供第一一致性检查。所提出的正式阐述指出,非扰动制度的特点应在更根本的层面上加以体现。它产生了一个可行的工具,在闵可夫斯基空间的强相互作用理论的唯象调查,在QFT框架内,动力成分是透明的,并在控制之下。

英文摘要:

The approach based on the Nakanishi integral representation of n-leg transition amplitudes is extended to the treatment of the self-energies of a fermion and an (IR-regulated) vector boson, in order to pave the way for constructing a comprehensive application of the technique to both gap- and Bethe-Salpeter equations, in Minkowski space. The achieved result, namely a 6-channel coupled system of integral equations, eventually allows one to determine the three Källén-Lehman weights for fully dressing the propagators of fermion and photon. A first consistency check is also provided. The presented formal elaboration points to embed the characteristics of the non-perturbative regime at a more fundamental level. It yields a viable tool in Minkowski space for the phenomenological investigation of strongly interacting theories, within a QFT framework where the dynamical ingredients are made transparent and under control.

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