SUSY-GUTs, SUSY-Seesaw and the neutralino dark matter
SUSY-GUTs, SUSY-Seesaw and the neutralino dark matter
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SUSY-GUT、SUSY-Seesaw 和中性暗物质
DOI：
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发表时间：
2007
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通讯作者：
S. Vempati
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作者：
L. Calibbi;Y. Mambrini;S. Vempati
我们将考虑一个右手中微子的SUSY-SU（5），它具有一个类似汤川耦合的大顶部。假设在高尺度下的普遍软质量，我们计算的低能谱，随后的中性伴子LSP遗迹密度也考虑到SU（5）以及跷跷板运行的规范耦合统一尺度以上的影响。我们发现tan β 35在参数空间中不存在可行区域。当tan β为35−40时，共湮灭过程开始变得有效。然而，这一过程受到Stau比中性伴子轻的有限范围的限制。事实上，对于给定的tan β，我们发现在这个区域中最轻的中性伴子质量（M × 10）存在一个上限。A极漏斗区出现在非常大的tan β 45−50处，而焦点区直到很大（m0，M1/2），即几TeV才出现。高尺度下的大A0项可以导致与WMAP约束一致的扩展区域，并消除Stau共湮没区域的上界。
We will consider a SUSY-SU(5) with one right-handed neutrino with a large top like Yukawa coupling. Assuming universal soft masses at high scale we compute the low-energy spectrum and subsequently the neutralino LSP relic density taking also into consideration SU(5) as well as the see-saw running effects above the gauge coupling unification scale. We found that there exists no viable region in parameter space for tan β 35. The coannihilation process starts becoming efficient for tan β 35−40. However, this process is significantly constrained by the limited range in which the stau is lighter than the neutralino. In fact, for a given tan β we find that there exists an upper bound on the lightest neutralino mass (Mχ10) in this region. The A-pole funnel region appears at very large tan β 45−50, while the focus-point region does not make an appearance till large (m0, M1/2), namely a few TeV. Large A0 terms at high scale can lead to extended regions consistent with WMAP constraints and remove the upper bounds in the stau coannihilation regions.