# Old and new results for BPS amplitudes in string theory

Carlo Angelantonj (Turin)

13.02.2014 at 16:15

I shall reconsider BPS-saturated amplitudes in heterotic string theory by using
our recently proposed method for computing modular integrals. I shall show
how these amplitudes can be naturally expressed in terms of generalised
holomorphic prepotentials whose (inhomogeneous) modular properties are
now completely under control and calculable. I shall finally apply our
techniques to vacua with spontaneous partial supersymmetry breaking, and
will present new results for gauge and gravitational thresholds and discuss
new Borcherd's product formulae.

Arnold Sommerfeld Center

Theresienstrasse 37

Room 348/349