Antisymmetric tensor propagator with spontaneous Lorentz violation

被引：28

作者：

Maluf, R., V ^{[1
]}

Araujo Filho, A. A. ^{[1
]}

Cruz, W. T. ^{[2
]}

Almeida, C. A. S. ^{[1
]}

机构：

[1] Univ Fed Ceara, Dept Fis, Campus Pici CP 6030, BR-60455760 Fortaleza, Ceara, Brazil

[2] Inst Fed Educ Ciencia & Tecnol Ceara IFCE, Campus Juazeiro do Norte, BR-63040000 Juazeiro Do Norte, CE, Brazil

来源：

EPL | 2018年 / 124卷 / 06期

关键词：

GRAVITY;

D O I：

10.1209/0295-5075/124/61001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this work, we study the spontaneous Lorentz symmetry breaking due to an antisymmetric 2-tensor field in Minkowski spacetirne. For a smooth quadratic potential, the spectrum of the theory exhibits massless and massive excitations. We show that the equations of motion for the free field obey some constraints which lead to the massive mode being nonpropagating at leading order. Besides, there exists a massless mode in the theory which can be identified with the usual Kalb-Ramond field, carrying only one on-shell degree of freedom. The same conclusion holds when one analyses the pole structure of its Feynman propagator. A new complete set of spin-type operators is found, which was the requirement to evaluate the propagator of the Kalb-Ramond field modified by the presence of a nonzero vacuum expectation value responsible for the Lorentz violation. Copyright (C) EPLA, 2019

引用

页数：6

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