On thermal gravitational contribution to particle production and dark matter

• Published in: Physics letters. B Vol. 774; no. C; pp. 676 - 681
• Main Authors: Tang, Yong, Wu, Yue-Liang
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 10.11.2017; Elsevier

We investigate the particle production from thermal gravitational annihilation in the very early universe, which is an important contribution for particles that might not be in thermal equilibrium or/and might only have gravitational interaction, such as dark matter (DM). For particles with spin 0,1...