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arXiv 1807.04009hep-ph
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e+e对撞机上高精度电弱SUSY产生截面

High-Precision Electroweak SUSY Production Cross Sections at e+e- Colliders

S. Heinemeyer, C. Schappacher

摘要:

为了在最小超对称标准模型(MSSM)中寻找电弱(EW)粒子,以及对这些粒子的未来精确分析,必须准确了解它们的产生和衰变特性。本文计算了复参数MSSM(cMSSM)中电荷伴、中性伴和slepton产生的截面。该评估基于对所有可能的生产通道(包括软光子辐射和硬光子辐射)的完整单循环计算。数值分析了相关cMSSM参数的截面的依赖性。我们发现相当大的贡献,许多生产截面。它们大约占树级结果的15%,但在极端情况下可能高达40%或更高。此外,许多生产通道的单回路校正的复杂参数的依赖性被发现是不可忽略的。因此,完整的单回路贡献对于未来线性e+e对撞机(如ILC或CLIC)的物理分析至关重要。

英文摘要:

For the search for electroweak (EW) particles in the Minimal Supersymmetric Standard Model (MSSM) as well as for future precision analyses of these particles an accurate knowledge of their production and decay properties is mandatory. We evaluate the cross sections for the chargino, neutralino and slepton production at e+e- colliders in the MSSM with complex parameters (cMSSM). The evaluation is based on a full one-loop calculation of all possible production channels including soft and hard photon radiation. The dependence of the cross sections on the relevant cMSSM parameters is analyzed numerically. We find sizable contributions to many production cross sections. They amount to roughly 15% of the tree-level results but can go up to 40% or higher in extreme cases. Also the dependence on complex parameters of the one-loop corrections for many production channels was found non-negligible. The full one-loop contributions are thus crucial for physics analyses at a future linear e+e- collider such as the ILC or CLIC.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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