Scalar and Spinor Particles in the Spacetime of a Domain Wall in String Theory

Abstract

We consider scalar and spinor particles in the spacetime of a domain wall in the context of low energy effective string theories, such as the generalized scalar-tensor gravity theories. This class of theories allows for an arbitrary coupling of the wall and the (gravitational) scalar field. First, we derive the metric of a wall in the weak-field approximation and we show that it depends on the wall's surface energy density and on two post-Newtonian parameters. Then, we solve the Klein-Gordon and the Dirac equations in this spacetime. We obtain the spectrum of energy eigenvalues and the current density in the scalar and spinor cases, respectively. We show that these quantities, except in the case of the energy spectrum for a massless spinor particle, depend on the parameters that characterize the scalar-tensor domain wall.

arXiv commentLATEX file, 21 pages, revised version to appear in Phys. Rev. D

References in corpus (15)

• The String Dilaton and a Least Coupling Principle
• String theory and gravity
• Supergravity Domain Walls
• Cosmic strings in dilaton gravity
• The dynamics of curved gravitating walls
• Cosmic String in Scalar-Tensor Gravities
• Current-Carrying Cosmic Strings in Scalar-Tensor Gravities
• Superconducting cosmic string in Brans-Dicke theory
• SURFACE CURRENT-CARRYING DOMAIN WALLS
• Global monopole in scalar tensor theory
• Cosmic String Wakes in Scalar-Tensor Gravities
• Local cosmic string in generalised scalar tensor theory
• Vacuumless cosmic strings in Brans-Dicke theory
• Dilatonic Domain Walls
• Vacuum Polarization in the Spacetime of a Scalar-Tensor Cosmic String

Cited by in corpus (2)

• Parametrized Post-Newtonian Expansion of Chern-Simons Gravity
• Gravitational field around a time-like current-carrying screwed cosmic string in scalar-tensor theories