# Institute for Particle Physics Phenomenology

### Seminar Details:

Title: D-instanton amplitudes in string theory Oxford Sen, Ashoke Sarkar, Subir 2021-03-04 16:00:00 www2.physics.ox.ac.uk https://zoom.us/j/99110556925 Zoom

### Seminar Description:

D-instantons give non-perturbative contribution to string theory
amplitudes which can be computed using world-sheet techniques.
However the integrals that appear in this computation often have
divergences from corners of the moduli spaces which cannot be
tamed by the usual procedure of analytic continuation. We show how
using insights from string field theory we can extract finite
unambiguous results from these apparently divergent integrals.