6 papers
Neural S-matrix bootstrap II: solvable 4d amplitudes with particle production
Mehmet Asim Gumus, Damien Leflot, Piotr Tourkine +1
We study a model for nonperturbative unitarization of the four-point contact scalar amplitude in four dimensions. It is defined through an infinite sum of planar diagrams, construc…
Tracking S-matrix bounds across dimensions
Mehmet Asim Gumus, Simon Metayer, Piotr Tourkine
We study massive scattering of identical scalar particles in spacetime dimensions 3 to 11 using non-perturbative S-matrix bootstrap techniques. Treating as a continuo…
Regge trajectories for UV completions of graviton scattering from polynomial boundedness
Christopher Eckner, Felipe Figueroa, Simon Metayer +1
We study graviton scattering amplitudes. Assuming they are UV completed by a theory of weakly coupled massive higher spins, we demonstrate that the UV completion must possess infin…
On the number of Regge trajectories for dual amplitudes
Christopher Eckner, Felipe Figueroa, Piotr Tourkine
Regge poles connect the analytic structure of scattering amplitudes, analytically continued in spin, to the high-energy limit in momentum space. Dual models are expected to have on…
The S-matrix bootstrap with neural optimizers I: zero double discontinuity
Mehmet Asim Gumus, Damien Leflot, Piotr Tourkine +1
In this work, we develop machine learning techniques to study nonperturbative scattering amplitudes. We focus on the two-to-two scattering amplitude of identical scalar particles,…
Eikonal amplitudes on the celestial sphere
Tim Adamo, Wei Bu, Piotr Tourkine +1
Celestial scattering amplitudes for massless particles are Mellin transforms of momentum-space scattering amplitudes with respect to the energies of the external particles, and beh…