We study soft and collinear gluon emission in squark decays to quark–neutralino pair, at next-to-next-to-leading logarithmic (NNLL) accuracy in the end-point region, using soft collinear effective theory (SCET), and at next-to-leading (NLO) fixed order in the rest of the phase space. As a phenomenological case study we discuss the impact of radiative corrections on the simultaneous measurements of squark and neutralino masses at a linear e + e ? collider based on s = 3 ? ? TeV Compact Linear Collider (CLIC), and show the softening of distributions in the sum of energies of the first two hardest jets or in the M C variable. Since the majority of mass measurement techniques are based on edges in kinematic distributions, and these change appreciably when there is additional QCD radiation in the final state, the knowledge of higher-order QCD effects is required for precise mass determinations.
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机译：我们在尾点区域的下一对数对数（NNLL）精度的Quark-Neumarithmic（NNLL）精度下，在终端点区域中研究Quark-中性量对，使用软线有效理论（SCET），以及下一个 - 在相位空间的其余部分中引导（NLO）固定顺序。 作为一种现象学案例研究，我们讨论了辐射校正对线性E + e频率的同时测量的影响？ 撞机基于s = 3？ 还 TEV Compact Linear Coller（Clic），并显示了前两个最硬喷射器的能量和在M C变量的能量之和中的分布软化。 由于大多数质量测量技术基于运动分布的边缘，并且在最终状态下存在额外的QCD辐射时，这些变化明显，因此需要高阶QCD效应的知识来实现精确的质量确定。
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