An improved lower bound to absorptive parts of scattering amplitudes in the unphysical region at high energies

1976 ◽  
Vol 106 ◽  
pp. 176-188 ◽  
Author(s):  
A.K. Common
Keyword(s):  
Scattering Amplitudes ◽  
Lower Bound ◽  
Unphysical Region ◽  
High Energies

Perturbation Theory of Scattering Amplitudes at High Energies

1963 ◽  
Vol 130 (6) ◽  
pp. 2566-2572 ◽  
Author(s):  
James D. Bjorken ◽  
Tai Tsun Wu
Keyword(s):  
Perturbation Theory ◽  
Scattering Amplitudes ◽  
High Energies

scholarly journals QCD at High Energies and Yangian Symmetry

Universe ◽  
2018 ◽  
Vol 4 (11) ◽  
pp. 124
Author(s):  
Roland Kirschner
Keyword(s):  
Scattering Amplitudes ◽  
Evolution Equation ◽  
Parton Distributions ◽  
High Energies ◽  
Yangian Symmetry

Yangian symmetric correlators provide a tool to investigate integrability features of QCD at high energies. We discuss the kernel of the equation of perturbative Regge asymptotics, the kernels of the evolution equation of parton distributions, Born scattering amplitudes and coupling renormalization.

scholarly journals Ultraviolet behaviour of Higgs inflation models

2021 ◽  
Vol 2021 (8) ◽  
Author(s):  
Ignatios Antoniadis ◽  
Anthony Guillen ◽  
Kyriakos Tamvakis
Keyword(s):  
Scattering Amplitudes ◽  
Planck Scale ◽  
Tree Level ◽  
Minimal Coupling ◽  
High Energies

Abstract We study the ultraviolet behaviour of Higgs inflation models above the apparent unitarity violation scale arising from the large non minimal coupling to gravity, by computing on-shell 4-point scattering amplitudes in the presence of a large inflaton background, away from the electroweak vacuum. We find that all tree-level amplitudes are well behaved at high energies below the inflaton background that can thus take values up to the Planck scale. This result holds in both the metric and Palatini formulation, and is independent of the frame (Jordan or Einstein) as expected. The same result also holds if an R2 term is added to the action.

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