English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We calculate all the four-photon helicity amplitudes at the one-loop level ina massive theory using multiple-cut methods. The amplitudes are derived inscalar QED, QED and $\textrm{QED}^{\caln =1}$ theories. We will see the originof rational terms. We extend the calculation to the simplest six-photonhelicity amplitude where all photons have the same helicity.

Light-by-light scattering amplitudes from generalized unitarity in massive QED