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arXiv 1306.1567hep-phastro-ph.HE
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MSSM的暗物质和对撞机特征

Dark matter and collider signatures of the MSSM

Andrew Fowlie, Kamila Kowalska, Leszek Roszkowski, Enrico Maria Sessolo, Yue-Lin Sming Tsai

摘要:

我们探索的MSSM与9个自由参数(p9 MSSM)已被选为一个最小的集合,允许调查的中性伴子暗物质和对撞机签名,同时保持一致的几个约束。这些包括普朗克的暗物质遗迹密度的测量,发现的希格斯玻色子的主要性质,LHC直接超对称搜索,标准模型类BR(Bs -> μ+ μ-)的最新证据,δ(g-2)的测量,加上一些其他的电弱和味物理约束。在sqrt(s)=8 TeV的能量下,我们模拟了LHC的两种直接超对称搜索:包含α T的CMS方子和胶子搜索,以及在末态有3l+E T^缺失的CMS电弱产生搜索.我们使用后者来确定参数空间的区域,在2σ处与δ(g-2)一致,这些区域不被直接限制从电弱产生中排除。我们发现它们对应于200 GeV<m_x <500 GeV窗口中的中性伴子质量。我们还实现了XENON 100排除界限的可能性,其中我们第一次考虑了最近从混沌数据中确定的π_{πN}项的影响,π_{πN}=43 \pm 12 MeV。我们表明,在这种测量的光,目前的统计影响的XENON 100绑定大大减少,虽然未来的灵敏度的LUX和XENON 1 T实验将有决定性的影响混合bino/higgsino组成的中性伴子。我们指出δ(g-2)和XENON 100的约束之间的一些张力。最后,我们提出了各种间接搜索的暗物质,即γ射线通量从dSphs和银河系中心在费米-LAT,和正电子通量在AMS 02的前景。我们还显示了5年的敏感性自旋相关的中性子质子截面由于中微子通量从太阳在冰立方。

英文摘要:

We explore the MSSM with 9 free parameters (p9MSSM) that have been selected as a minimum set that allows an investigation of neutralino dark matter and collider signatures while maintaining consistency with several constraints. These include measurement of the dark matter relic density from PLANCK, main properties of the discovered Higgs boson, LHC direct SUSY searches, recent evidence for a Standard Model-like BR(Bs -> μ+ μ-), and the measurement of δ(g-2), plus a number of other electroweak and flavor physics constraints. We perform a simulation of two LHC direct SUSY searches at sqrt(s)=8 TeV: the CMS inclusive α_T search for squarks and gluinos and the CMS electroweak production search with 3l+E_T^miss in the final state. We use the latter to identify the regions of the parameter space, consistent at 2σ with δ(g-2), that are not excluded by the direct limits from the electroweak production. We find that they correspond to a neutralino mass in the window 200 GeV<m_χ<500 GeV. We also implement the likelihood for the XENON100 exclusion bound, in which we consider for the first time the impact of a recent determination of the Σ_{πN} term from CHAOS data, Σ_{πN}=43\pm12 MeV. We show that in light of this measurement, the present statistical impact of the XENON100 bound is greatly reduced, although future sensitivities of the LUX and XENON1T experiments will have decisive impact on the mixed bino/higgsino composition of the neutralino. We point out some tension between the constraints from δ(g-2) and XENON100. Finally, we present prospects for various indirect searches of dark matter, namely γ-ray fluxes from dSphs and the Galactic Center at Fermi-LAT, and the positron flux at AMS02. We also show the 5-year sensitivity on the spin-dependent neutralino-proton cross section due to neutrino fluxes from the Sun at IceCube.

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