Karateev, DenisMarucha, JanPenedones, JoaoSahoo, Biswajit2023-01-162023-01-162023-01-162022-12-2210.1007/JHEP12(2022)136https://infoscience.epfl.ch/handle/20.500.14299/193780WOS:000903144100002We study gapped 4d quantum field theories (QFTs) obtained from a relevant deformation of a UV conformal field theory (CFT). For simplicity, we assume the existence of a Z(2) symmetry and a single Z2-odd stable particle and no Z(2)-even particles at low energies. Using unitarity, crossing and the assumption of maximal analyticity we compute numerically a lower bound on the value of the a-anomaly of the UV CFT as a function of various non-perturbative parameters describing the two-to-two scattering amplitude of the particle.Physics, Particles & FieldsPhysicsanomalies in field and string theoriesnonperturbative effectsscattering amplitudesc-theoremtext::journal::journal article::research article