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arXiv 0912.3137hep-phastro-ph.CO
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太阳中CMSSM LSP湮灭的中微子通量

Neutrino Fluxes from CMSSM LSP Annihilations in the Sun

John Ellis, Keith A. Olive, Christopher Savage, Vassilis C. Spanos

摘要:

我们评估的中微子通量预计从太阳内部的中性中微子LSP湮灭,在最小的超对称扩展的标准模型与超对称破缺标量和gaugino质量约束是普遍的在大统一尺度(CMSSM)。我们发现在典型的CMSSM $(m_{1/2}, m_0)$平面上有很大的区域,太阳内部的LSP密度不平衡,因此湮灭率可能远低于俘获率。我们发现中微子通量在20%的水平上依赖于太阳模型,并采用Serenelli等人的AGSS 09模型进行详细的研究。我们发现,在CMSSM $(m_{1/2}, m_0)$平面的大区域中,捕获率不受自旋相关的LSP-质子散射的支配,例如,沿CMSSM共湮灭带的大$m_{1/2}$。我们计算了沿共湮灭/快速湮灭和聚焦点带的点的各种阈值能量以上的中微子通量,其中CMSSM产生了正确的宇宙学遗迹密度tan(β)= 10和55 $μ$ > 0,探索它们对自旋相关和独立散射矩阵元的不确定性的敏感性。我们还提出了详细的中微子光谱的四个基准模型,说明通用的CMSSM内的可能性。扫描CMSSM参数空间中有利于宇宙学的部分,我们发现IceCube/DeepCore探测器最多只能探测这个参数空间的一部分,特别是焦点区域,也可能在共湮灭带的低质量尖端。

英文摘要:

We evaluate the neutrino fluxes to be expected from neutralino LSP annihilations inside the Sun, within the minimal supersymmetric extension of the Standard Model with supersymmetry-breaking scalar and gaugino masses constrained to be universal at the GUT scale (the CMSSM). We find that there are large regions of typical CMSSM $(m_{1/2}, m_0)$ planes where the LSP density inside the Sun is not in equilibrium, so that the annihilation rate may be far below the capture rate. We show that neutrino fluxes are dependent on the solar model at the 20% level, and adopt the AGSS09 model of Serenelli et al. for our detailed studies. We find that there are large regions of the CMSSM $(m_{1/2}, m_0)$ planes where the capture rate is not dominated by spin-dependent LSP-proton scattering, e.g., at large $m_{1/2}$ along the CMSSM coannihilation strip. We calculate neutrino fluxes above various threshold energies for points along the coannihilation/rapid-annihilation and focus-point strips where the CMSSM yields the correct cosmological relic density for tan(beta) = 10 and 55 for $μ$ > 0, exploring their sensitivities to uncertainties in the spin-dependent and -independent scattering matrix elements. We also present detailed neutrino spectra for four benchmark models that illustrate generic possibilities within the CMSSM. Scanning the cosmologically-favored parts of the parameter space of the CMSSM, we find that the IceCube/DeepCore detector can probe at best only parts of this parameter space, notably the focus-point region and possibly also at the low-mass tip of the coannihilation strip.

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