论文标题
纯重力介导的超对称性的higgsino暗物质
Higgsino Dark Matter in Pure Gravity Mediated Supersymmetry
论文作者
论文摘要
我们考虑了超对称性破裂的纯重力冥想（PGM）模型中直接检测暗物质的前景。最小的PGM模型仅需要两个参数，即Gravitino质量，$ M_ {3/2} $，该参数设置了所有标量质量的紫外线质量和$ \tanβ$。仪表群是通过异常介导产生的。通常，最轻的超对称状态（暗物质候选者）是Wino。在这里，我们通过允许Higgs软质量偏离普遍性来考虑最小模型的单参数扩展。为了简单起见，我们将它们保持平等，并将$μ$ - 期作为替代物。我们还考虑非全世界停止群众。 $ |μ| \ sim 1 $ tev，当gravitino质量为订单$ \ sim 1 $ pev和$ \tanβ\ simeq 2 $时，higgsino是可行的暗物质候选者。我们计算质子上暗物质散射的自旋依赖性和自旋依赖性横截面。对于独立于自旋的散射，现有的实验极限将约束放在PGM参数空间上。当前允许的大部分参数空间都位于不可还原的中微子背景之上。因此，未来的直接检测实验将能够探测其余的大部分PGM参数空间。
We consider the prospects for the direct detection of dark matter in pure gravity meditation (PGM) models of supersymmetry breaking. Minimal PGM models require only two parameters, the gravitino mass, $m_{3/2}$, which sets the UV mass for all scalar masses, and $\tanβ$. Gaugino masses are generated through anomaly mediation. Typically the lightest supersymmetric state (the dark matter candidate) is a wino. Here, we consider a one-parameter extension of the minimal model by allowing the Higgs soft masses to deviate from universality. For simplicity, we take these to be equal and use the $μ$-term as a surrogate. We also consider non-universal stop masses. When $|μ| \sim 1$ TeV, the Higgsino is a viable dark matter candidate when the gravitino mass is of order $\sim 1$ PeV and $\tanβ\simeq 2$. We calculate the spin-dependent and spin-independent cross sections for dark matter scattering on protons. For spin-independent scattering, existing experimental limits place constraints on the PGM parameter space. Much of the currently allowed parameter space lies above the irreducible neutrino background. Thus, future direct detection experiments will be able to probe much of the remaining PGM parameter space.
