# New relations for graviton-matter amplitudes

- Institution: CERN
- Department: Theory Colloquium
- Speaker: Jan Plefka
- Year: 2018
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3012732)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

I report on recent progress in finding compact expressions for scattering amplitudes involving gravitons and gluons as well as massive scalar and fermionic matter particles. At tree level the single graviton emission amplitudes may be expressed as linear combination of purely non-gravitational ones. At the one-loop level recent results on all four point Einstein-Yang-Mills amplitudes with at most one opposite helicity state using unitarity methods are reported. .

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## Lectures

1. [New relations for graviton-matter amplitudes](https://invisiblenetwork.ai/learn/cern/3012732/e6bbbabade64), 58 min (CERN's player)