Absorption and Recoil of Fundamental String by D-String

TL;DR

This paper calculates the absorption cross section of a fundamental IIB string by a D-string, confirming leading order results and analyzing subleading corrections related to recoil and binding energy conversion.

Contribution

It provides a perturbative calculation of the absorption cross section and explores the dominant planar diagram contributions to subleading corrections in the large mass limit.

Findings

Leading order absorption cross section matches stringy Higgs mechanism estimate.

Subleading corrections are dominated by planar diagrams in the large mass limit.

Explicitly shows recoil effects and energy conversion in next-to-leading order.

Abstract

Inclusive absorption cross section of fundamental IIB string to D-string is calculated perturbatively. The leading order result agrees with estimate based on stringy Higgs mechanism via Cremmer-Scherk coupling. It is argued that the subleading order correction is dominated by purely planar diagrams in the large mass limit. The correction represents conversion of binding energy into local recoil process of the fundamental string and D-string bound state. We show their presence explicitly in the next leading order.