期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 11, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2008/11/020
关键词
dark matter; big bang nucleosynthesis; cosmology of theories beyond the SM; physics of the early universe
The catalysis of nuclear reactions by negatively charged relics leads to increased outputs of primordial Li-6 and Be-9. In combination with observational constraints on the primordial fractions of Li-6 and Be-9, this imposes strong restrictions on the primordial abundance and the lifetime of charged relics. We analyze the constraints from the catalysis of Be-9 on supersymmetric models in which the gravitino is the lightest supersymmetric particle and a charged slepton-such as the lighter stau-the next-to-lightest supersymmetric particle (NLSP). Barring the special cases in which the primordial fraction of the slepton NLSP is significantly depleted, we find that the Be-9 data require a slepton NLSP lifetime of less than 6 x 10(3) s. We also address the issue of the catalytic destruction of Li-6 and Be-9 by late-forming bound states of protons with negatively charged relics, finding that it does not lead to any significant modification of the limit on the slepton lifetime.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据