Big_bang nucleosynthesis with a long_lived CHAMP including He4 spallation process

18th International Symposium on Particles Strings and Cosmology

Yamanaka, Masato^1 ; Jittoh, Toshifumi^2 ; Kohri, Kazunori^1 ; Koike, Masafumi^2 ; Sato, Joe^2 ; Sugai, Kenichi^2 ; Yazaki, Koichi^3,4

Theory Center, Institute of Particle and Nuclear Studies, KEK (High Energy Accelerator Research Organization), 1-1 Oho, Tsukuba 305-0801, Japan^1

Department of Physics, Saitama University, Shimo-okubo, Sakura-ku, Saitama, 338-8570, Japan^2

Hashimoto Mathematical Physics Laboratory, Nishina Accelerator Research Center, RIKEN, Wako, Saitama 351-0198, Japan^3

Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan^4

关键词: Big bang nucleosynthesis;    Helium 4;    Light elements;    Spallation process;    Supersymmetric standard models;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/485/1/012020/pdf
DOI  :  10.1088/1742-6596/485/1/012020

来源: IOP

【 摘 要 】

We propose helium-4 spallation processes induced by long-lived stau in supersymmetric standard models, and investigate an impact of the processes on light elements abundances. We show that, as long as the phase space of helium-4 spallation processes is open, they are more important than stau-catalyzed fusion and hence constrain the stau property. This talk is based on the work of ref. [1].