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Optimized probes of CP-odd effects in the tt¯h process at hadron colliders
Nuclear Physics B ( IF 2.8 ) Pub Date : 2021-01-26 , DOI: 10.1016/j.nuclphysb.2021.115328
Blaž Bortolato , Jernej F. Kamenik , Nejc Košnik , Aleks Smolkovič

We use machine learning (ML) and non-ML techniques to study optimized CP-odd observables, directly and maximally sensitive to the CP-odd iκ˜t¯γ5th interaction at the LHC and prospective future hadron colliders using the final state with a Higgs boson and a top quark pair, pptt¯h, followed by semileptonic t decays. We perform phase-space optimization of manifestly CP-odd observables (ω), sensitive to the sign of κ˜, and constructed from experimentally accessible final state momenta. We identify a simple optimized linear combination αω that gives similar sensitivity as the studied fully fledged ML models. Using αω we project the expected sensitivities to κ˜ at HL-LHC, HE-LHC, and FCC-hh.



中文翻译:

CP中奇数效应的优化探针ŤŤ¯H 强子对撞机的过程

我们用机器学习(ML)和非ML技术研究优化CP余观测,直接到最大限度敏感CP有余一世κŤ¯γ5ŤH 在大型强子对撞机和未来的强子对撞机之间进行交互,并使用最终状态与希格斯玻色子和顶夸克对, ppŤŤ¯H,然后是半轻度t衰变。我们执行对CP符号奇数敏感的明显CP奇数可观察值(ω)的相空间优化κ,并根据实验可访问的最终状态动量构造。我们确定一个简单的优化线性组合αω具有与研究的完全成熟的ML模型相似的敏感性。使用αω 我们预计对 κ 在HL-LHC,HE-LHC和FCC-hh。

更新日期:2021-01-29
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