One-loop adjoint masses for branes at non-supersymmetric angles

TL;DR

This paper calculates one-loop radiative corrections to adjoint scalar masses in non-supersymmetric intersecting D-brane models, revealing tachyonic instabilities arising from supersymmetry breaking deviations.

Contribution

It provides a detailed computation of one-loop adjoint scalar masses in non-supersymmetric brane setups, highlighting the emergence of tachyonic modes due to slight angle deviations.

Findings

Infrared contributions dominate the mass corrections.

Tachyonic directions appear at leading order.

Messengers and Kaluza-Klein modes influence mass generation.

Abstract

This proceeding is based on arXiv:1105.0591 [hep-th] where we consider breaking of supersymmetry in intersecting D-brane configurations by slight deviation of the angles from their supersymmetric values. We compute the masses generated by radiative corrections for the adjoint scalars on the brane world-volumes. In the open string channel, the string two-point function receives contributions only from the infrared limits of N~4 and N~2 supersymmetric configurations, via messengers and their Kaluza-Klein excitations, and leads at leading order to tachyonic directions.