Scattering Cross Section and Stability of Global Monopoles

Autor:	Pitelli, J. P. M., Barroso, V. S., Richartz, Maurício
Rok vydání:	2017
Předmět:	General Relativity and Quantum Cosmology High Energy Physics - Theory
Zdroj:	Phys. Rev. D 96, 105021 (2017)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevD.96.105021
Popis:	We study the scattering of scalar waves propagating on the global monopole background. Since the scalar wave operator in this topological defect is not essentially self-adjoint, its solutions are not uniquely determined until a boundary condition at the origin is specified. As we show, this boundary condition manifests itself in the differential cross section and can be inferred by measuring the amplitude of the backscattered wave. We further demonstrate that whether or not the spacetime is stable under scalar perturbations also relies on the chosen boundary condition. In particular, we identify a class of such boundary conditions which significantly affects the differential cross section without introducing an instability. Comment: 6 pages, 1 figure. To appear in Phys Rev D
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1711.03526 Zobrazit plný text záznamu View this record from Arxiv