论文标题
BSM三联耦合的理论概念和测量前景：标量顶夸克的案例研究
Theoretical concepts and measurement prospects for BSM trilinear couplings: a case study for scalar top quarks
论文作者
论文摘要
在可能在LHC上发现新的重颗粒后，确定新状态的特性和基础物理学至关重要。在这项工作中，我们专注于标量三线性耦合，以示例为例，顶级夸克标量伙伴与Higgs Boson的标量伙伴的三联耦合。我们讨论了实验确定标量顶（Stop）三联耦合参数的可能策略，该参数控制了停止 - 停滞 - higgs的相互作用，我们证明了对此参数的不同重级化处方的影响。我们发现，与测量值相比，确定停止三联耦合的最佳前景是其量子效应输入模型预测的量子效应。我们指出，Higgs-Boson质量的预测对停止三线性耦合的敏感性也很高，即使对于大量的非标准粒子。关于定位三联耦合的重量化，我们确定了一种重量量量量标方案，鉴于目前的准确性，该方案是优选的，我们阐明了无法用标准的肾函数分组方法重新亮起的潜在大对数的来源。
After the possible discovery of new heavy particles at the LHC, it will be crucial to determine the properties and the underlying physics of the new states. In this work, we focus on scalar trilinear couplings, employing as an example the case of the trilinear coupling of scalar partners of the top quark to the Higgs boson. We discuss possible strategies for experimentally determining the scalar top (stop) trilinear coupling parameter, which controls the stop--stop--Higgs interaction, and we demonstrate the impact of different renormalisation prescriptions for this parameter. We find that the best prospects for determining the stop trilinear coupling arise from its quantum effects entering the model prediction for the mass of the SM-like Higgs boson in comparison to the measured value. We point out that the prediction for the Higgs-boson mass has a high sensitivity to the stop trilinear coupling even for heavy masses of the non-standard particles. Regarding the renormalisation of the stop trilinear coupling we identify a renormalisation scheme that is preferred in view of the present level of accuracy and we clarify the source of potentially large logarithms that cannot be resummed with standard renormalisation group methods.
