Arbitrariness in the gravitational Chern-Simons-like term induced radiatively

被引：17

作者：

Felipe, J. C. C. ^{[1
,4
]}

Vieira, A. R. ^{[1
]}

Cherchiglia, A. L. ^{[1
]}

Baeta Scarpelli, A. P. ^{[2
]}

Sampaio, Marcos ^{[1
,3
]}

机构：

[1] Univ Fed Minas Gerais, Dept Fis, BR-30161970 Belo Horizonte, MG, Brazil

[2] Dept Policia Fed, Setor Tecn, Sao Paulo, Brazil

[3] Univ Durham, Ctr Particle Theory, Dept Math Sci, Sci Labs, Durham DH1 3LE, England

[4] Newcastle Univ, Sch Math & Stat, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

来源：

PHYSICAL REVIEW D | 2014年 / 89卷 / 10期

关键词：

CPT VIOLATION; INDUCED LORENTZ; REGULARIZATION; LIMITS;

D O I：

10.1103/PhysRevD.89.105034

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The induction of a Lorentz- and CPT-violating Chern-Simons-like term in a fermionic theory embedded in linearized quantum gravity is reassessed. We explicitly show that gauge symmetry on underlying Feynman diagrams does not fix the arbitrariness inherent to such induced term at one loop order. We present the calculation in a nonperturbative expansion in the Lorentz-violating parameter b(mu) and within a framework which, besides operating in the physical dimension, judiciously parametrizes regularization dependent arbitrary parameters usually fixed by symmetries.

引用

页数：7

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