# Where is M-theory?

### APA

Guerrieri, A. (2023). Where is M-theory?. Perimeter Institute. https://pirsa.org/23030105

### MLA

Guerrieri, Andrea. Where is M-theory?. Perimeter Institute, Mar. 14, 2023, https://pirsa.org/23030105

### BibTex

@misc{ pirsa_PIRSA:23030105, doi = {10.48660/23030105}, url = {https://pirsa.org/23030105}, author = {Guerrieri, Andrea}, keywords = {Quantum Fields and Strings}, language = {en}, title = {Where is M-theory?}, publisher = {Perimeter Institute}, year = {2023}, month = {mar}, note = {PIRSA:23030105 see, \url{https://pirsa.org}} }

Andrea Guerrieri Perimeter Institute for Theoretical Physics

## Abstract

I will use the S-matrix Bootstrap to carve out the space of unitary, crossing symmetric, and supersymmetric graviton scattering amplitudes in nine, ten, and eleven dimensions. I will introduce a novel extension of positivity for massless particles beyond the forward limit called “positivity in the sky” that significantly improves the convergence of the bootstrap algorithm.

I will show the bounds on the first leading correction to maximal supergravity, study the physics of the extremal amplitudes and compare them with the available nonperturbative String and M-theory results.

Zoom link: https://pitp.zoom.us/j/99182927406?pwd=bWxIazFvUzhVQkpBdWluZURIM21wUT09