Piercing of domain walls: new mechanism of gravitational radiation

Abstract

Domain wall (DW) moving in media undergoes the friction force due to particle scattering. However certain particles are not scattered, but perforate the wall. As a result, the wall gets excited in the form of the branon wave, while the particle experiences an acceleration jump. This gives rise to generation of gravitational waves which we call "piercing gravitational radiation" (PGR). Though this effect is of higher order in the gravitational constant than the quadrupole radiation from the collapsing DWs, its amplitude is enhanced in the case of relativistic particles or photons because of absence of the velocity factor which is present in the quadrupole formula. We derive the spectral-angular distribution of PGR within the simplified model of the weakly gravitating particle-wall system in Minkowski space-time of arbitrary dimensions. Within this model the radiation amplitude is obtained analytically. The spectral-angular distribution of PGR in such an approach suffers from infrared and ultraviolet divergences as well as from collinear divergence in the case of a massless perforating particle. Different cut-off schemes appropriate in various dimensions are discussed. Our results are applicable both to cosmological DWs and to the braneworld models.

30 pages, 8 figures

References in corpus (13)

• A review of gravitational waves from cosmic domain walls
• Merger Transitions in Brane--Black-Hole Systems: Criticality, Scaling, and Self-Similarity
• Examination of a simple example of gravitational wave memory
• Global aspects of radiation memory
• Gravitational waves from domain walls and their implications
• Domain walls and gravitational waves in the Standard Model
• Critical escape velocity of black holes from branes
• Gravitational waves from Higgs domain walls
• Classical ultrarelativistic bremsstrahlung in extra dimensions
• Effective action of a five-dimensional domain wall
• Electrodynamics of massless charged particles
• Branes and Black holes in Collision
• Energy-momentum balance in particle - domain wall perforating collision

Cited by in corpus (3)

• Probing Left-Right Symmetry via Gravitational Waves from Domain Walls
• Synchrotron radiation in odd dimensions
• Probing High Scale Dirac Leptogenesis via Gravitational Waves from Domain Walls