论文标题
直接在HL-LHC和Future Colleders探索Higgs-Top Yukawa的CP结构
Directly Probing the CP-structure of the Higgs-Top Yukawa at HL-LHC and Future Colliders
论文作者
论文摘要
限制Higgs玻色子性能是LHC计划和未来山脉的基石。在这项雪人贡献中，我们研究了通过$ t \ bar {t} h $生产在HL-LHC，100 TEV FCC和MUON COLLIDERS上直接探测Higgs-Top CP结构的潜力。我们发现95％Cl的CP阶段（$α$）的限制为$ |α| \ Lessim 36^\ circ $ with dialeptonic $ t \ bar t（h \ to b \ bar b）$和$ |α| \ lyssim 25^\ circ $与HL-LHC的合并$ t \ bar t（h \toγγ）$。 100 TEV FCC带来了$ |α|的灵敏度的显着提高。 \ lyssim 3^\ circ $ for dialeptonic $ t \ bar t（h \ to b \ bar b）$，由于信号横截面的显着增益和增加的发光度。在未来的Muon Colliders中，我们发现具有半雌科$ t \ bar t的界限（h \ to b \ bar b）ν\barν$是$ |α| \ Lessim 9^\ Circ $ 10 TEV和$ |α| \ Lessim 3^\ Circ $分别用于30 TEV。
Constraining the Higgs boson properties is a cornerstone of the LHC program and future colliders. In this Snowmass contribution, we study the potential to directly probe the Higgs-top CP-structure via the $t\bar{t}h$ production at the HL-LHC, 100 TeV FCC and muon colliders. We find the limits on the CP phase ($α$) at 95% CL are $|α| \lesssim 36^\circ$ with dileptonic $t\bar t (h\to b\bar b) $ and $|α| \lesssim 25^\circ$ with combined $t\bar t (h\to γγ) $ at the HL-LHC. The 100 TeV FCC brings a significant improvement in sensitivity with $|α| \lesssim 3^\circ$ for the dileptonic $t\bar t (h\to b\bar b) $, due to the remarkable gain in the signal cross-section and the increased luminosity. At future muon colliders, we find that the bounds with semileptonic $t\bar t (h\to b\bar b) ν\barν$ are $|α| \lesssim 9^\circ$ for 10 TeV and $|α| \lesssim 3^\circ$ for 30 TeV, respectively.
