Scientific article
Open access

Towards a nonperturbative construction of the S-matrix

Published inThe journal of high energy physics, vol. 2023, 197
Publication date2023
First online date2023-05-25

We present a nonperturbative recipe for directly computing the S-matrix in strongly-coupled QFTs. The method makes use of spectral data obtained in a Hamiltonian framework and can be applied to a wide range of theories, including potentially QCD. We demonstrate the utility of this prescription in the specific example of the 2+1d O(N) model at large N, using energy eigenstates computed with Hamiltonian truncation to reproduce the full 2 → 2 scattering amplitude for arbitrary (complex) center-of-mass energy.

  • Nonperturbative Effects
  • Scattering Amplitudes
  • Field Theories in Lower Dimensions
  • Hamiltonian
  • Nonperturbative
  • Spectral
  • Quantum chromodynamics
  • Scattering amplitude
  • O(N)
  • Energy eigenstate
Citation (ISO format)
HENNING, Brian et al. Towards a nonperturbative construction of the S-matrix. In: The journal of high energy physics, 2023, vol. 2023, p. 197. doi: 10.1007/jhep05(2023)197
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Article (Published version)
ISSN of the journal1029-8479

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