Fermions in superstring field theories

Author(s)

Luciano Barosi de Lemos

• Document type: Doctoral Thesis
• Press: São Paulo.
• Institution: Universidade de São Paulo (USP). Instituto de Física (IF/SBI)
• Defense date: 2003-05-06

Examining board members

Nathan Jacob Berkovits; Elcio Abdalla; Marcelo Otavio Caminha Gomes; Vladimir Perchine; Galen Mihaylov Sotkov

• Advisor: Nathan Jacob Berkovits

Abstract

The goal of this work is to compute the superstring field theory action contribution for the two first mass level of the superstring, including both GSO sectors. A type IIA superstring in the presence of an unstable non-BPS D9 brane is considered and the computation of the action for the Tachyon, Gauge Field and Massless fermions from GSO(+) and GSO(-) sectors is done. The main work is accomplished using the hybrid formalism and the superstring field theory action of Berkovits, including the Ramond Sector. This task is accomplished by including revision material thoroughly, for conformal and super conformal field theory. Construction of physical GSO(-) vertex operators is considered in detail. At the end, theres a discussion about the action for these fields and some future perspectives are considered. (AU)