Gravitational equations of motion in modified theories of gravity have oscillating solutions, both in the early and in the present day universe. Particle production by such oscillations is analyzed and possible observational consequences are considered. This phenomenon has impact on energy spectrum of cosmic rays and abundance of dark matter particles.

中文翻译：

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早期和现在宇宙中修正重力下的粒子产生

修正的引力理论中的引力运动方程在早期和现在的宇宙中都有振荡解。分析了这种振荡产生的粒子，并考虑了可能的观测结果。这种现象对宇宙射线的能谱和暗物质粒子的丰度都有影响。