Cosmic ray production in modified gravity

TL;DR

This paper defends the authors' previous work by countering criticisms and demonstrates that $F(R)$ modified gravity theories can effectively produce high-energy cosmic rays in contracting systems.

Contribution

It clarifies the validity of particle production in $F(R)$ theories and refutes criticisms, confirming their potential for cosmic ray generation.

Findings

$F(R)$ theories enable efficient high-energy cosmic ray production.

Criticisms against particle production in these theories are invalid.

Contracting systems in modified gravity can generate cosmic rays effectively.

Abstract

This paper is a reply to the criticism of our work on particle production in modified gravity by D. Gorbunov and A. Tokareva. We show that their arguments against efficient particle production are invalid. $F(R)$ theories can lead to an efficient generation of high energy cosmic rays in contracting systems.