arXiv 2006.131102020-06hep-ph

强子对撞机$t \bar{t} h$过程中$CP$奇效应的优化探测

Optimized probes of $CP$-odd effects in the $t \bar{t} h$ process at hadron colliders

Blaž Bortolato, Jernej F. Kamenik, Nejc Košnik, Aleks Smolkovič

备注：: As published
DOI：: 10.1016/j.nuclphysb.2021.115328

摘要：

我们使用机器学习（ML）和非ML技术来研究优化的$CP$ -奇观测量，直接和最大限度地敏感于$CP$ -奇$i \tilde κ\bar t γ^5 t h$相互作用在LHC和未来的强子对撞机使用的最终状态与希格斯玻色子和顶夸克对，$pp\to t\bar t h$，其次是半轻子$t$衰变。我们进行相空间优化的明显$CP$ -奇观测量（$\boldsymbol ω$），敏感的符号$\tilde κ$，并从实验上可访问的最终状态动量。我们确定了一个简单的优化的线性组合$\boldsymbol α\cdot \boldsymbolω$，提供了类似的灵敏度，作为研究的完全成熟的ML模型。使用$\boldsymbolα\cdot \boldsymbolω$，我们预测了HL-LHC、HE-LHC和FCC-hh对$\tilde κ$的预期灵敏度。

英文摘要：

We use machine learning (ML) and non-ML techniques to study optimized $CP$-odd observables, directly and maximally sensitive to the $CP$-odd $i \tilde κ\bar t γ^5 t h$ interaction at the LHC and prospective future hadron colliders using the final state with a Higgs boson and a top quark pair, $pp\to t\bar t h$, followed by semileptonic $t$ decays. We perform phase-space optimization of manifestly $CP$-odd observables ($\boldsymbol ω$), sensitive to the sign of $\tilde κ$, and constructed from experimentally accessible final state momenta. We identify a simple optimized linear combination $\boldsymbol α\cdot \boldsymbolω$ that gives similar sensitivity as the studied fully fledged ML models. Using $\boldsymbolα\cdot \boldsymbolω$ we project the expected sensitivities to $\tilde κ$ at HL-LHC, HE-LHC, and FCC-hh.

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。

摘要：

英文摘要：

相关论文