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arXiv · 2106.00018

Directly Probing the Higgs-top Coupling at High Scales

Roshan Mammen Abraham·Dorival Gonçalves·Tao Han·Sze Ching Iris Leung·Han Qin
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Abstract

We explore the sensitivity to new physics for the coupling of the Higgs boson ($h$) and top quark ($t$) at high energy scales with the process $pp\to t\bar{t}h$ at the high-luminosity LHC. This process probes the coupling in both the space-like and time-like domains at a high scale, complementary to the off-shell Higgs processes in the time-like domain. The effects from physics beyond the Standard Model are parametrized in terms of the effective field theory framework and a non-local Higgs-top form factor. Focusing on the boosted Higgs regime in association with jet substructure techniques, we show that the present search can directly probe the Higgs-top coupling to good precision, providing a strong sensitivity to the new physics scale.

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Roshan Mammen Abraham, Dorival Gonçalves, Tao Han, Sze Ching Iris Leung, Han Qin. 2021-05-31. Directly Probing the Higgs-top Coupling at High Scales. https://doi.org/10.1016/j.physletb.2021.136839

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