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Challenges with Internal Photons in Constructive QED
Neil Christensen, Harold Diaz-Quiroz, Bryan Field +2
We find the correct spinor amplitude for a simple photon-mediated process and show that, in contrast, the result for the same process using the standard constructive techniques do…
2-, 3- and 4-Body Decays in the Constructive Standard Model
Neil Christensen, Bryan Field, Annie Moore +1
We further develop the massive constructive theory of the Standard Model and use it to calculate the amplitude and squared amplitude for all two-body decays, a collection of weak t…
The Constructive Standard Model: Part I
Neil Christensen, Bryan Field
In this paper, we construct the complete set of minimal 3-point vertices for the massive Standard Model (SM) based purely on symmetry principles, mass dimension and high-energy beh…
A First Step Towards Effectively Nonperturbative Scattering Amplitudes in the Perturbative Regime
Neil Christensen, Joshua Henderson, Santiago Pinto +1
We propose an effectively nonperturbative approach to calculating scattering amplitudes in the perturbative regime. We do this in a discretized momentum space by using the QSE meth…
Diagonalizing the Hamiltonian of Theory in 2 Space-Time Dimensions
Neil Christensen
We propose a new non-perturbative technique for calculating the field-theory S-matrix directly from the eigenstates of the Hamiltonian. Our method involves a discretized momentum s…
On Tree-Level Unitarity in Theories of Massive Spin-2 Bosons
Neil D. Christensen, Stefanus
We analyze the tree-level 2->2 scattering of massive spin-2 bosons in a theory with only relevant and marginal operators and extract the sum rules on the coupling constants and mas…