D-brane Bremsstrahlung

Understand

We study the dynamics of ultrarelativistic D-branes.

• The dominant phenomenon is bremsstrahlung: mild acceleration induced by closed string interactions triggers extremely rapid energy loss through radiation of massless closed strings.
• After characterizing bremsstrahlung from a general k-dimensional extended object in a D-dimensional spacetime, we incorporate effects specific to D-branes, including velocity-dependent forces and open string pair creation.
• We then show that dissipation due to bremsstrahlung can substantially alter the dynamics in DBI inflation.