揭示最小超对称标准模型中次领头阶下希格斯ino-核子散射的消失
Unveiling the Vanishing Higgsino-Nucleon Scattering in the MSSM at Next-to-Leading Order
浏览论文内容
中文总结 AI 辅助
研究最小超对称标准模型中希格斯ino暗物质，通过考察次领头阶辐射修正，明确导致希格斯ino-核子散射被抑制的抵消机制，确定参数空间中自旋无关截面可能消失的区域。
中文摘要 AI 辅助
希格斯ino暗物质被认为是标准模型超对称扩展产生的最具动机且最简单的暗物质情景之一。受电弱自然性要求推动，希格斯ino预计相对较轻，质量接近弱标度。虽然纯希格斯ino态通常能避开当前直接探测限制，但次领头阶辐射修正可能使其进入未来实验的探测灵敏度范围。更重要的是，在双粒子产生的运动学阈值附近，次领头阶修正会使暗物质-核子截面低于中微子本底。我们明确研究了导致希格斯ino-核子散射被抑制的抵消机制，并确定了最小超对称标准模型参数空间中自旋无关截面可能消失的区域。
英文摘要
Higgsino dark matter (DM) is considered one of the most well-motivated and minimal DM scenarios arising from supersymmetric extensions of the Standard Model. Motivated by the requirement of electroweak naturalness, Higgsinos are expected to be relatively light, with masses close to the weak scale. While a pure Higgsino state typically evades current direct detection limits, next-to-leading (NLO) order radiative corrections may bring it within the sensitivity of upcoming experiments. On the contrary, a more important consequence, observed specifically near the kinematic threshold for the production of two particles, is that the NLO corrections lower the DM-nucleon cross section below the neutrino floor. We explicitly examine the cancellation mechanism responsible for suppressed Higgsino-nucleon scattering and identify regions of MSSM parameter space where spin-independent cross-sections may vanish.
