Demartin Federico, Maltoni Fabio, Mawatari Kentarou, Page Ben, Zaro Marco
Centre for Cosmology, Particle Physics and Phenomenology (CP3), Université catholique de Louvain, 1348 Louvain-la-Neuve, Belgium.
Theoretische Natuurkunde and IIHE/ELEM, Vrije Universiteit Brussel, and International Solvay Institutes, Pleinlaan 2, 1050 Brussels, Belgium.
Eur Phys J C Part Fields. 2014;74(9):3065. doi: 10.1140/epjc/s10052-014-3065-2. Epub 2014 Sep 23.
At the LHC the CP properties of the top-quark Yukawa interaction can be probed through Higgs production in gluon fusion or in association with top quarks. We consider the possibility for both CP-even and CP-odd couplings to the top quark to be present, and study CP-sensitive observables at next-to-leading order (NLO) in QCD, including parton-shower effects. We show that the inclusion of NLO corrections sizeably reduces the theoretical uncertainties, and confirm that di-jet correlations in [Formula: see text] jet production through gluon fusion and correlations of the top-quark decay products in [Formula: see text] production can provide sensitive probes of the CP nature of the Higgs interactions.
在大型强子对撞机（LHC）中，顶夸克汤川相互作用的CP性质可以通过胶子融合过程中希格斯玻色子的产生或与顶夸克的关联产生来探测。我们考虑顶夸克同时存在CP偶数和CP奇数耦合的可能性，并在量子色动力学（QCD）的次领头阶（NLO）下研究对CP敏感的可观测量，包括部分子淋浴效应。我们表明，包含NLO修正会显著降低理论不确定性，并证实通过胶子融合在[公式：见正文]喷注产生中的双喷注关联以及在[公式：见正文]产生中顶夸克衰变产物的关联能够为希格斯相互作用的CP性质提供灵敏的探测手段。
