Title: Effective action of bosonic string theory at order $\alpha'^{2}$
Presenter: Hadi Gholian (FUM)
Time & Date: Saturday, August 3rd, 2024 (Mordad 13th, 1403), 10:00 AM IRST
Location: Ferdowsi University, Faculty of Science, Physics Department, Management office (in person)
Abstract: In this lecture, the results of PhD thesis will be presented:
First, we explain how the couplings of second-order bosonic and heterotic actions, obtained by T-duality, can be reduced to the minimum possible number, by means of the redefinition of fields, Bianchi identities, and total derivative terms. Then, by calculating the Feynman diagram of these couplings, the scattering amplitude for 6 B-fields in the field theory will be calculated. Then we compare the results with the string theory S-matrix scattering amplitude of six closed strings. To do this, we explain how to calculate triple hypergeometric integrals.