Abelian cosmic string in the Starobinsky model of gravity. (11th February 2016)

• Record Type: Journal Article
• Authors: Morais Graça, J P
• Is Part Of: Classical and quantum gravity. Volume 33:Number 5(2016:Mar.)
• Publication Date: 2016-02-11
• Subjects: cosmic strings -- Starobinsky model -- Abelian–Higgs Model -- numerical solutions; 04.20.Jb -- 04.50.Kd -- 04.60.Cf; Quantum gravity -- Periodicals; Gravitation -- Periodicals; Relativity (Physics) -- Periodicals; Space and time -- Periodicals; Periodicals; 521.1
• DOI: 10.1088/0264-9381/33/5/055004
• Languages: English
• ISSNs: 0264-9381

Abstract

Abstract: In this paper, I analyze numerically the behaviour of the solutions corresponding to an Abelian string in the framework of the Starobinsky model. The role played by the quadratic term in the Lagrangian density of this model is emphasized and the results are compared with the corresponding ones obtained in the framework of Einstein's theory of gravity. I have found that the angular deficit generated by the string is lowered as the η parameter increases, allowing a well-behaved spacetime for a large range of values of the symmetry-breaking scale.