arXiv 1603.044392016-03hep-ph

SaxiGUTs及其预测

SaxiGUTs and their Predictions

Raymond T. Co, Francesco D'Eramo, Lawrence J. Hall

备注：: 29 pages, 7 figures; v2, version published in Physical Review D
发表信息：: Phys. Rev. D 94, 075001 (2016)
DOI：: 10.1103/PhysRevD.94.075001

摘要：

我们介绍了一类统一的超对称轴子理论，统一和PQ对称性打破了同一套领域的规模$\sim 2\times 10^{16}$ GeV。一个典型的30阶畴壁数导致一个$10^{15}$ GeV阶的轴子衰减常数$f_a$。暴胀产生了一个大的saxion凝聚，给出了低于$1-10$ TeV阶超对称破缺的QCD标度的再热温度$T_R$。轴子场振荡开始于QCD尺度附近的轴子物质占主导地位的时代，最近的晶格计算的温度依赖性的轴子质量在这个时代允许一个受控的计算的轴子暗物质丰度。一个成功的预测，这丰富的结果为一个初始的轴子失准角的顺序单位，$θ_i \sim 1$。一个高度相关的一套预测讨论$f_a$，$T_R$，超对称希格斯质量参数$μ$，暗辐射$ΔN_{eff}$量，质子衰变率$Γ(p \rightarrow e^+ π^0)$，等曲率密度扰动和宇宙微波背景的$B$模式。当暴胀的能量标度也是$10^{16}$ GeV量级时，后两个特别有趣。

英文摘要：

We introduce a class of unified supersymmetric axion theories with unified and PQ symmetries broken by the same set of fields at a scale $\sim 2\times 10^{16}$ GeV. A typical domain wall number of order 30 leads to an axion decay constant $f_a$ of order $10^{15}$ GeV. Inflation generates a large saxion condensate giving a reheat temperature $T_R$ below the QCD scale for supersymmetry breaking of order $1-10$ TeV. Axion field oscillations commence in the saxion matter-dominated era near the QCD scale, and recent lattice computations of the temperature dependence of the axion mass in this era allow a controlled calculation of the axion dark matter abundance. A successful prediction of this abundance results for an initial axion misalignment angle of order unity, $θ_i \sim 1$. A highly correlated set of predictions is discussed for $f_a$, $T_R$, the supersymmetric Higgs mass parameter $μ$, the amount of dark radiation $ΔN_{eff}$, the proton decay rate $Γ(p \rightarrow e^+ π^0)$, isocurvature density perturbations and the $B$-mode of the cosmic microwave background. The last two are particularly interesting when the energy scale of inflation is also of order $10^{16}$ GeV.

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英文摘要：

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