# Recent Developments in Spacetime-Symmetry tests in Gravity

## TL;DR

This paper reviews recent theoretical and experimental advances in testing CPT and Lorentz symmetry within gravity, highlighting extensions of effective field theory into nonlinear gravitational regimes.

## Contribution

It introduces new developments in applying effective field theory to nonlinear gravity for spacetime-symmetry tests.

## Key findings

- Extended effective field theory framework into nonlinear gravity regimes
- Summarized recent experimental tests of CPT and Lorentz symmetry in gravity
- Highlighted theoretical progress in spacetime-symmetry investigations

## Abstract

We summarize theoretical and experimental work on tests of CPT and local Lorentz symmetry in gravity. Recent developments include extending the effective field theory framework into the nonlinear regime of gravity.