# Searching for CPT Violation with Neutral-Meson Oscillations

## TL;DR

This paper introduces a comprehensive method to detect CPT violation in neutral-meson oscillations using an effective field theory approach, analyzing effects of CPT-violating operators of various dimensions and extracting experimental bounds.

## Contribution

It develops a general formalism incorporating CPT-violating operators of arbitrary dimension into neutral-meson oscillation analysis, and provides first experimental constraints on dimension-five operators.

## Key findings

- Established a formalism for CPT violation in meson oscillations
- Extracted experimental bounds on dimension-five CPT-violating operators
- Discussed observable effects of CPT violation in meson systems

## Abstract

A general technique is presented for treating CPT violation in neutral-meson oscillations. The effective field theory for a complex scalar with CPT-violating operators of arbitrary mass dimension is incorporated in the formalism for the propagation and mixing of neutral mesons. Observable effects are discussed, and first measurements of CPT-violating operators of dimension five are extracted from existing experimental results.