We extend our previous studies of the neutrino fluxes expected from neutralino LSP annihilations inside the Sun to include variants of the minimal supersymmetric extension of the Standard Model (MSSM) with squark, slepton and gaugino masses constrained to be universal at the GUT scale, but allowing one or two non-universal supersymmetry-breaking parameters contributing to the Higgs masses (NUHM1,2). As in the constrained MSSM (CMSSM) with universal Higgs masses, there are large regions of the NUHM parameter space where the LSP density inside the Sun is not in equilibrium, so that the annihilation rate may be far below the capture rate, and there are also large regions where the capture rate is not dominated by spin-dependent LSP-proton scattering. The spectra possible in the NUHM are qualitatively similar to those in the CMSSM. We calculate neutrino-induced muon fluxes above a threshold energy of 10 GeV, appropriate for the IceCube/DeepCore detector, for points where the NUHM yields the correct cosmological relic density for representative choices of the NUHM parameters. We find that the IceCube/DeepCore detector can probe regions of the NUHM parameter space in addition to analogues of the focus-point strip and the tip of the coannihilation strip familiar from the CMSSM. These include regions with enhanced Higgsino-gaugino mixing in the LSP composition, that occurs where neutralino mass eigenstates cross over. On the other hand, rapid-annihilation funnel regions in general yield neutrino fluxes that are unobservably small.
Partial wave treatment of Supersymmetric Dark Matter in the presence of CP - violation
我们提出了一种改进的分波分析的主导LSP湮灭通道的费米子-反费米子对,从而避免了非相对论性的扩展,因此适用于阈值和极点附近。我们开发的方法允许的贡献的任何分波在总的角动量J在对比分波分析的轨道角动量L的初始状态,这通常是截断的p-波,并产生非常准确的结果。该方法是制定在这样一种方式,以允许容易处理的CP违反阶段驻留在超对称参数。我们应用这种改进的分波技术来计算在希格斯混合参数μ和大tanb三线性A耦合中存在CP违反项的约束MSSM(CMSSM)中的中性伴子残余密度。在μ和A中包含CP破坏相并没有显著地扰乱图像,并且通过Higgs交换将LSP湮灭到a b b_bar,仍然是在远离stau-coannihilation和“焦点”的区域中获得宇宙学上可接受的中性伴子遗迹密度的主导机制。如果我们考虑到高真质量,特别是胶子质量中的相位,就会发生显著的变化。
Non-zero trilinear parameter in the mSUGRA model - dark matter and collider signals at Tevatron and LHC
在具有小$m_0$和小$m_{1/2}$的最小超引力(mSUGRA)模型中,参数空间的现象学上可行和有趣的区域与WMAP关于暗物质遗迹密度的数据和LEP 2中最轻的希格斯标量$ m_h>$ 114 GeV的质量上的束缚一致,如果相当特别的假设$A_0$ =0,则打开,其中$A_0$是常见的三线性软破裂参数,在大多数现有的分析中使用的是放松的。由于该区域对应于相对较轻的方子和胶子,它们可能在LHC实验的早期阶段被广泛探测,因此详细研究了$A_0$的中等或大负值的后果。我们发现,在该区域,最轻超对称粒子对湮灭、超对称粒子对与较轻的τ-slepton(${\tilde τ}_1$)共湮灭和超对称粒子对与较轻的顶夸克(${\tilde t}_1$)共湮灭等过程对观测到的暗物质遗迹密度都有贡献. % \sout{The possibility that a relic density producing ${\tilde t}_1$ can be %observed at the current experiments at the Tevatron is wide open.}一个${\tilde t}_1$,可以参与共湮灭与最轻的中性伴子,以满足WMAP约束的遗迹密度,同时被观察到在目前的实验在Tevatron的可能性是很大的开放。在大型强子对撞机上,大量的夸克-胶子事件导致了一个非常独…
Exploring the Singlino-dominated Thermal Neutralino Dark Matter in the $Z_3$ invariant NMSSM
SRM University-AP(SRM大学-安得拉邦);Aix Marseille Univ., Université de Toulon, CNRS, CPT, IPhU(艾克斯-马赛大学、土伦大学、法国国家科学研究中心、理论物理中心、统一粒子物理研究所);Kavli IPMU (WPI), UTIAS, The University of Tokyo(卡弗里宇宙起源原初物理学国际研究中心(世界顶尖科学家计划)、东京大学航空宇宙工程学研究所);Centre for High Energy Physics, Indian Institute of Science(印度理工学院高能物理中心)