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Mini workshop on the S-matrix bootstrap

20 septembre 2024
LAPTh
Fuseau horaire Europe/Paris

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  1. 14. The Hybrid Bootstrap
    Noé Suchel
    20/09/2024 10:00

    In recent years, great focus has been given to analytical functionals to bootstrap extremal solutions to crossing. Current bootstrap methods mainly focus on determining the CFT data associated to the lowest lying operators. We will attempt to open a path towards approximating the full spectrum of extremal solutions in 1d by employing the powerful extremal functionals. Knowing the asymptotic...

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  2. 15. The S-matrix Bootstrap with Neural Networks
    Damien Leflot
    20/09/2024 10:35

    I will introduce a new method for solving the unitarity equations in the S-matrix bootstrap framework using neural networks. This approach is designed to be applied to amplitudes that satisfy the Mandelstam representation, which helps ensure an accurate description of the fine structure of the scattering amplitude, particularly their double discontinuity. As an initial validation, we applied...

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  3. 17. Exploring the Spectrum of Consistent EFTs
    Sara Ricossa
    20/09/2024 11:55

    I will discuss the implications of consistency conditions coming from Causality and Unitarity on the parameter space of Effective Field Theories (EFTs) of particles with spin $J$. I will show in particular that for $J\geq2$, the mass must be parametrically close to that of the nearest UV excitation, thus reducing the range of applicability of such theories.

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  4. 18. Gong show
    20/09/2024 14:30
  5. 19. Local conformal field theory from long range perturbation theory
    Junchen Rong (IHES, France)
    20/09/2024 15:50

    Conformal field theory (CFT) can be studied using perturbative methods, such as the 4-epsilon expansion and the large N expansion. In this talk, I will introduce an alternative approach: a fixed-dimensional perturbation theory that incorporates long-range, non-local interactions. I will demonstrate that by imposing the conformal Ward Identity, it is possible to recover the data of local CFTs....

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  6. 20. Non-invertible symmetries and scattering amplitudes.
    Lucia Cordova
    20/09/2024 16:25