Radiation from Accelerated Branes

TL;DR

This paper investigates the radiation emitted by accelerated fundamental strings and D-branes in string theory, deriving formulas for scalar radiation and analyzing angular distributions within a linear supergravity approximation.

Contribution

It provides a new Larmor-type formula for scalar radiation from accelerating branes and explores the interaction effects on gauge and gravitational radiation.

Findings

Scalar, gauge, and gravitational radiation are emitted by accelerated branes.

Derived a Larmor-type formula for scalar radiation.

Calculated classical radii of branes via Thompson scattering cross sections.

Abstract

The radiation emitted by accelerated fundamental strings and D-branes is studied within the linear approximation to the supergravity limit of string theory. We show that scalar, gauge field and gravitational radiation is generically emitted by such branes. In the case where an external scalar field accelerates the branes, we derive a Larmor-type formula for the emitted scalar radiation and study the angular distribution of the outgoing energy flux. The classical radii of the branes are calculated by means of the corresponding Thompson scattering cross sections. Within the linear approximation, the interaction of the external scalar field with the velocity fields of the branes gives a contribution to the observed gauge field and gravitational radiation.