Matter-antimatter asymmetry and non-inertial effects

TL;DR

This paper explores how non-inertial, accelerated frames affect CP-violation in particle decay, suggesting that high accelerations slightly reduce matter-antimatter asymmetry, with implications for cosmology and thermodynamics in curved spacetime.

Contribution

It introduces a quantum field theory model in curved spacetime to analyze the impact of acceleration on CP violation in particle decay processes.

Findings

CP violation parameter decreases slightly at high accelerations

Accelerated decay processes show reduced matter-antimatter asymmetry

Results connect non-inertial effects with thermodynamical phenomena in curved spacetime

Abstract

We investigate non-inertial effects on $CP$-violating processes using a model, based on the framework of quantum field theory in curved spacetimes, devised to account for the decay of accelerated particles. We show that the $CP$ violation parameter for the decay of accelerated kaons into two pions decreases very slightly as very high accelerations are achieved, implying decreased asymmetry between matter and antimatter in this regime. We discuss the relationship between these results and cosmological processes surrounding matter-antimatter asymmetry and argue that, due to the connection between non-inertial and thermal phenomena established by the Unruh effect, this kind of computation may prove useful in furthering the understanding of thermodynamical effects in curved spacetimes.