Matter–antimatter mixing in the universe and interaction rates

Determine the degree of mixing between matter and antimatter across the universe and derive the expected frequency of observable matter–antimatter interactions, such as gamma-ray signals, based on this mixing.

Background

The authors propose that anti-stars may exist and note the observational difficulty of detecting them, as signatures would rely on interactions with surrounding matter. They explicitly state that it is unknown how well matter and antimatter are mixed throughout the universe, which prevents prediction of interaction frequency and associated observational signatures.