Eur. Phys. J. C (2018) 78: 481
https://doi.org/10.1140/epjc/s10052-018-5968-9

Regular Article - Theoretical Physics

Cosmic ray production in modified gravity

¹ Novosibirsk State University, Novosibirsk, 630090, Russia
² Department of Higher Mathematics, Dubna State University, Dubna, 141980, Russia
³ ITEP, Bol. Cheremushkinsaya ul., 25, Moscow, 113259, Russia
⁴ Central European Institute for Cosmology and Fundamental Physics (CEICO), Fyzikální ustáv Akademie věd ČR, Na Slovance 2, 182 21, Prague 8, Czech Republic

^* e-mail: dolgov@fe.infn.it

Received: 1 April 2018
Accepted: 29 May 2018
Published online: 11 June 2018

Abstract

This paper is a reply to the criticism of our work on particle production in modified gravity by Gorbunov and 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.