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research article
Towards a nonperturbative construction of the S-matrix
May 25, 2023
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.
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Name
JHEP05(2023)197.pdf
Type
Publisher's version
Access type
openaccess
License Condition
CC BY
Size
1.93 MB
Format
Adobe PDF
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