Where Is String Theory in the Space of Scattering Amplitudes?

• Autor(a) principal: Guerrieri, Andrea [UNESP]
• Data de Publicação: 2021
• Outros Autores: Penedones, João, Vieira, Pedro [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1103/PhysRevLett.127.081601; http://hdl.handle.net/11449/229406

We use the S-matrix bootstrap to carve out the space of unitary, crossing symmetric and supersymmetric graviton scattering amplitudes in ten dimensions. We focus on the leading Wilson coefficient α controlling the leading correction to maximal supergravity. The negative region α<0 is excluded by a simple dual argument based on linearized unitarity (the desert). A whole semi-infinite region αâ 0.14 is allowed by the primal bootstrap (the garden). A finite intermediate region is excluded by nonperturbative unitarity (the swamp). Remarkably, string theory seems to cover all (or at least almost all) the garden from very large positive α-At weak coupling-To the swamp boundary-At strong coupling.