Current Renormalization in Finite Volume

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For finite volume field theories with discrete translational invariance, conserved currents can be additively renormalized by infrared effects. We demonstrate this for pions using chiral perturbation theory coupled to electromagnetism in a periodic box. Gauge invariant single particle effective theories are constructed to explain these results. In such theories, current renormalization arises from operators involving the zero mode of the gauge field. No contradictions with Ward identities, or low-energy theorems are encountered.
15pp., 4 figs, wording and discussion improved

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High Energy Physics - Lattice, High Energy Physics - Phenomenology, Nuclear Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/200500

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0706.3408
 http://arxiv.org/abs/0706.3408
 Phys.Lett.B653:350-357,2007
 doi:10.1016/j.physletb.2007.07.060

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arXiv