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arXiv 0804.2899hep-ph
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用暗物质观测解LHC反问题

Solving the LHC Inverse Problem with Dark Matter Observations

Baris Altunkaynak, Michael Holmes, Brent D. Nelson

摘要:

我们调查的效用,宇宙学和天体物理观测区分超对称理论。特别是,我们考虑276对模型,产生了几乎相同的模式,在强子对撞机的观测。尽管固有的不确定性,如本地晕密度模型,或从天体物理学来源的背景率,我们发现与稳定的遗迹中性伴子的观测可以是一个令人惊讶的有效候选理论之间的判别。我们把注意力集中在中性伴子散射实验(直接检测的遗迹中性伴子)和观测的γ射线从遗迹中性伴子湮灭(间接检测实验)。在非常保守的物理假设和背景估计下,我们发现276个简并对中有101个可以区分。使用稍微乐观一点的背景利率假设,这一数字增加到276对中的186对。在直接探测领域,区分模型的能力将取决于在解决核基质元素不确定性方面的进一步进展。对于在间接检测领域的观测,我们讨论了这些结果的敏感性,额外的假设的宇宙学密度的中性伴和星系晕配置文件。我们还评论这项研究的互补性,最近的工作调查这些相同的对在500 GeV的线性对撞机。

英文摘要:

We investigate the utility of cosmological and astrophysical observations for distinguishing between supersymmetric theories. In particular we consider 276 pairs of models that give rise to nearly identical patterns of observables at hadron colliders. Despite inherent uncertainties in such things as the local halo density model, or background rates from astrophysical sources, we find observations associated with stable relic neutralinos can be a surprisingly effective discriminant between candidate theories. We focus attention on neutralino scattering experiments (direct detection of relic neutralinos) and observations of gamma-rays from relic neutralino annihilation (indirect detection experiments). With extremely conservative physics assumptions and background estimates we find 101 of the 276 degenerate pairs can be distinguished. Using slightly more optimistic assumptions about background rates increases this number to 186 of the 276 pairs. In the direct detection arena the ability to distinguish between models will be dependent on further progress in addressing uncertainty in nuclear matrix elements. For observations in the indirect detection arena we discuss the sensitivity of these results to additional assumptions made about the cosmological density of neutralinos and the galactic halo profile. We also comment on the complementarity of this study to recent work investigating these same pairs at a 500 GeV linear collider.

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