PIRSA:17020107

# PSI 2016/2017 - String Theory Review - Lecture 2

### APA

Gaiotto, D. (2017). PSI 2016/2017 - String Theory Review - Lecture 2. Perimeter Institute. https://pirsa.org/17020107

### MLA

Gaiotto, Davide. PSI 2016/2017 - String Theory Review - Lecture 2. Perimeter Institute, Feb. 22, 2017, https://pirsa.org/17020107

### BibTex

@misc{ pirsa_17020107, doi = {}, url = {https://pirsa.org/17020107}, author = {Gaiotto, Davide}, keywords = {}, language = {en}, title = {PSI 2016/2017 - String Theory Review - Lecture 2}, publisher = {Perimeter Institute}, year = {2017}, month = {feb}, note = {PIRSA:17020107 see, \url{https://pirsa.org}} }

Davide Gaiotto Perimeter Institute for Theoretical Physics

**Collection**

**Talk Type**Course

## Abstract

The scattering amplitude of string perturbation theory as an integral over intrinsic geometry of the world sheet and a path integral over all possible emeddings of world-sheet in space-time; Nambu-Goto action and Polyakov action.