tt¯H Interactions and T-odd Correlations at Hadron Colliders

IF 3.4 3区物理与天体物理 Q2 PHYSICS, NUCLEAR

Journal of Physics G: Nuclear and Particle Physics Pub Date : 2024-02-27 DOI:10.1088/1361-6471/ad2276

Apurba Tiwari, Sudhir Kumar Gupta

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引用次数: 0

Abstract

We explore

-violation effects of Higgs-top interactions in the associated production of a Higgs boson with top-pair in the dileptonic decay modes of top-quark originating from proton proton collisions

pp→tt¯H→(l+νlb)(l−νl¯b¯)H

at NLO in QCD matched to parton shower via T-odd observables using momenta of various particles involved in the process. In particular, we predict the constraints on the

-violating

tt¯H

coupling obtained through the production asymmetries associated with the T-odd observables in the dileptonic decay channel of the

tt¯

pair for the Large hadron collider (LHC) with centre-of-mass energy of 13 TeV and an integrated luminosity of 139 fb⁻¹. We also present the corresponding limits for future hadron colliders, namely the High Luminosity LHC (HL-LHC) and the Future Circular Collider (FCC-hh). Our estimates of the

tt¯H

interaction strength reveal that the upper bound on pseudoscalar coupling c _p corresponding to the largest asymmetry would be of about 1.57 × 10⁻² at 2σ C.L. for c _s = 1 at the LHC with

=13 TeV for an integrated luminosity of 139 fb⁻¹. The respective limits for HL-LHC and FCC-hh with the projected Luminosities of 3 ab⁻¹ and 30 ab⁻¹ are found to be to 2.7 × 10⁻³ and 1.3 × 10⁻⁴ respectively at 2σ C.L.

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强子对撞机上的 tt¯H 相互作用和 T-odd 相关性

我们探索了在质子质子碰撞 pp→tt¯H→(l+νlb)(l-νl¯b¯)H 的 NLO 阶段，希格斯玻色子与顶夸克对的二重衰变模式中，希格斯玻色子-顶相互作用的 CP 破坏效应。特别是，我们预测了在大型强子对撞机（LHC）上，通过与 T-odd 观测数据相关的二重子衰变通道中 tt'对的产生不对称而获得的违反 CP 的 tt'H耦合的约束，其质量中心能量为 13 TeV，综合光度为 139 fb-1。我们还提出了未来强子对撞机的相应限制，即高亮度大型强子对撞机（HL-LHC）和未来环形对撞机（FCC-hh）。我们对tt¯H相互作用强度的估计显示，在S=13 TeV的大型强子对撞机上，当cs=1时，在2σ C.L.，139 fb-1的综合光度下，对应于最大不对称的伪星耦合cp的上限约为1.57 × 10-2。在2σ C.L.时，HL-LHC和FCC-hh的极限分别为2.7 × 10-3和1.3 × 10-4。

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来源期刊

Journal of Physics G: Nuclear and Particle Physics 物理-物理：核物理

CiteScore

7.60

自引率

5.70%

发文量

105

审稿时长

1 months

期刊介绍： Journal of Physics G: Nuclear and Particle Physics (JPhysG) publishes articles on theoretical and experimental topics in all areas of nuclear and particle physics, including nuclear and particle astrophysics. The journal welcomes submissions from any interface area between these fields. All aspects of fundamental nuclear physics research, including: nuclear forces and few-body systems; nuclear structure and nuclear reactions; rare decays and fundamental symmetries; hadronic physics, lattice QCD; heavy-ion physics; hot and dense matter, QCD phase diagram. All aspects of elementary particle physics research, including: high-energy particle physics; neutrino physics; phenomenology and theory; beyond standard model physics; electroweak interactions; fundamental symmetries. All aspects of nuclear and particle astrophysics including: nuclear physics of stars and stellar explosions; nucleosynthesis; nuclear equation of state; astrophysical neutrino physics; cosmic rays; dark matter. JPhysG publishes a variety of article types for the community. As well as high-quality research papers, this includes our prestigious topical review series, focus issues, and the rapid publication of letters.