Probing the top-Higgs Yukawa CP structure in dileptonic t(t)over-barh with M2-assisted reconstruction

被引：0
|
作者：
Goncalves, Dorival [1 ]
Kim, Jeong Han [2 ]
Kong, Kyoungchul [2 ]
机构：
[1] Univ Pittsburgh, Dept Phys & Astron, PITT PACC, 3941 OHara St, Pittsburgh, PA 15260 USA
[2] Univ Kansas, Dept Phys & Astron, 1251 Wescoe Hall Dr, Lawrence, KS 66045 USA
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2018年 / 06期
基金：
美国国家科学基金会;
关键词：
Beyond Standard Model; Higgs Physics; BROKEN SYMMETRIES; HADRON; MASSES;
D O I：
10.1007/JHEP06(2018)079
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
Constraining the Higgs boson properties is a cornerstone of the LHC program. We study the potential to directly probe the Higgs-top CP-structure via the t (t) over barh channel at the LHC with the Higgs boson decaying to a bottom pair and top-quarks in the dileptonic mode. We show that a combination of laboratory and t (t) over bar rest frame observables display large CP-sensitivity, exploring the spin correlations in the top decays. To efficiently reconstruct our final state, we present a method based on simple mass minimization and prove its robustness to shower, hadronization and detector effects. In addition, the mass reconstruction works as an extra relevant handle for background suppression. Based on our results, we demonstrate that the Higgs-top CP-phase (alpha) can be probed up to cos alpha < 0.7 at the high luminosity LHC.
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页数：24
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