Radiation of Closed Strings between the Parallel Dynamical-Dressed Unstable Dp-Branes

TL;DR

This paper calculates the radiation of massless closed strings between dynamical, unstable Dp-branes with background fields, analyzing effects at large distances and exploring potential axion radiation within bosonic string theory.

Contribution

It introduces a boundary state for Dp-branes with tangential dynamics and background fields, and computes the radiation amplitude of massless closed strings in this setup.

Findings

Radiation amplitude depends on brane separation and background fields.

Large distance effects influence the radiation characteristics.

Potential for axion radiation at large brane separations.

Abstract

We introduce a boundary state which is corresponding to a D$p$-brane with tangential dynamics in the presence of the Kalb-Ramond field, a tachyonic field and a $U(1)$ gauge potential in a special gauge. From the interaction of such branes radiation amplitude of a general massless closed string will be computed. The effects of the large distances of the branes on this radiation will be studied. In the large distances of the branes, the possibility of axion radiation will be investigated. Our calculations will be in the context of the bosonic string theory.