Coupled Scalar Fields Oscillons and Breathers in Some Lorentz Violating Scenarios

• Published in: Advances in high energy physics Vol. 2015; no. 2015; pp. 1 - 17
• Main Authors: Correa, R. A. C., Dutra, A. de Souza
• Format: Journal Article
• Language: English
• Published: Cairo, Egypt Hindawi Publishing Corporation 01-01-2015; Hindawi Limited
• Subjects: Breaking; Breathers; Cosmology; Displacement; Expanding universe theory; Joining; Mathematical analysis; Origins; Oscillons; Scalars; Symmetry
• ISSN: 1687-7357; 1687-7365
• DOI: 10.1155/2015/673716

We discuss the impact of the breaking of the Lorentz symmetry on the usual oscillons,the so-called flat-top oscillons, and the breathers. Our analysis is performed by using a Lorentz violationscenario rigorously derived in the literature. We show that the Lorentz violation is responsiblefor the origin of a kind of deformation of the configuration, where the field configuration becomesoscillatory in a localized region near its maximum value. Furthermore, we show that the Lorentzbreaking symmetry produces a displacement of the oscillon along the spatial direction; the samefeature is present in the case of breathers. We also show that the effect of a Lorentz violation inthe flat-top oscillon solution is responsible by the shrinking of the flat-top. Furthermore, we findanalytically the outgoing radiation; this result indicates that the amplitude of the outgoing radiationis controlled by the Lorentz breaking parameter, in such a way that this oscillon becomes moreunstable than its symmetric counterpart; however, it still has a long living nature.