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arXiv 0907.0594hep-ph
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从LHC数据有效重建CMSSM参数-案例研究

Efficient reconstruction of CMSSM parameters from LHC data - A case study

L. Roszkowski, R. Ruiz de Austri, R. Trotta

摘要:

我们提出了一个有效的方法重建的参数的约束MSSM从假设未来的LHC数据,适用于自己的权利,并结合宇宙学测定的遗迹暗物质丰度。聚焦于ATLAS SU 3基准点,我们证明了我们的简单高斯近似可以很好地恢复其参数的值。我们检查两个流行的非信息先验,并获得非常相似的结果,虽然当我们使用一个信息丰富,自然动机的先验,我们发现一些相当大的差异。我们表明,在重建SU 3参数的进一步强大的改善可以通过应用额外的信息,在WMAP的精度水平的遗物丰度,虽然预期的数据从普朗克将只有一个非常有限的额外影响。可能需要进一步的外部数据来打破一些剩余的简并。我们认为,这里提出的方法是适用于广泛的一类低能量有效的超对称模型,因为它不需要处理纯粹的实验问题,例如,检测器的性能,并具有计算效率的额外优势。此外,我们的方法可以区分模型的内部结构和外部数据对最终参数约束的影响。

英文摘要:

We present an efficient method of reconstructing the parameters of the Constrained MSSM from assumed future LHC data, applied both on their own right and in combination with the cosmological determination of the relic dark matter abundance. Focusing on the ATLAS SU3 benchmark point, we demonstrate that our simple Gaussian approximation can recover the values of its parameters remarkably well. We examine two popular non-informative priors and obtain very similar results, although when we use an informative, naturalness-motivated prior, we find some sizeable differences. We show that a further strong improvement in reconstructing the SU3 parameters can by achieved by applying additional information about the relic abundance at the level of WMAP accuracy, although the expected data from Planck will have only a very limited additional impact. Further external data may be required to break some remaining degeneracies. We argue that the method presented here is applicable to a wide class of low-energy effective supersymmetric models, as it does not require to deal with purely experimental issues, eg, detector performance, and has the additional advantages of computational efficiency. Furthermore, our approach allows one to distinguish the effect of the model's internal structure and of the external data on the final parameters constraints.

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