标题： 中性微子暗物质与轻量级超子 显示英文标题

标题： Neutralino Dark Matter with Light Staus

摘要： 尽管实验进展迅速，轻超粒子的窗口仍然存在。 一种可能性是一个约100 GeV的τ超子，其t通道交换可以为相对较轻的中性微子提供正确的热 relic 密度。 我们循序渐进地回顾了这一区域是如何出现的，并确定了两种将在多个方面很快被测试的不同情景。 在第一种情景中，中性微子具有显著的下型希格斯子成分，预计在直接探测实验中的速率相对较大。 在第二种情景中，两个相对较轻的超τ子之间存在大的混合，这可能导致希格斯玻色子到光子的分支比出现显著过剩。 此外，电弱超粒子足够轻，使得直接搜索应该有效。 显示英文摘要

摘要： In spite of rapid experimental progress, windows for light superparticles remain. One possibility is a ~100 GeV tau slepton whose t-channel exchange can give the correct thermal relic abundance for a relatively light neutralino. We pedagogically review how this region arises and identify two distinct scenarios that will be tested soon on multiple fronts. In the first, the neutralino has a significant down-type higgsino fraction and relatively large rates at direct detection experiments are expected. In the second, there is large mixing between two relatively light staus, which could lead to a significant excess in the Higgs boson branching ratio to photons. In addition, electroweak superpartners are sufficiently light that direct searches should be effective.