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arXiv · 1501.00012

Probing Higgs Boson $CP$ Properties with $t\bar{t}H$ at the LHC and the 100 TeV $pp$ Collider

Xiao-Gang He·Guan-Nan Li·Ya-Juan Zheng
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Abstract

The Higgs boson $H$ has the largest coupling to the top quark $t$ among the standard model (SM) fermions. This is one of the ideal places to investigate new physics beyond SM. In this work, we study the potential of determining Higgs boson $CP$ properties at the LHC and future 33 TeV and 100 TeV $pp$ colliders by analysing various operators formed from final states variables in $t\bar{t}H$ production. The discrimination power from SM coupling is obtained with Higgs boson reconstructed from $ H\to \gamma \gamma$ and $ H\to b \bar{b}$. We find that $t\bar{t}b\bar{b}$ process can provide more than 3$\sigma$ discrimination power with 300 $fb^{-1}$ integrated luminosity in a wide range of allowed Higgs to top couplings for the LHC, the 33 TeV and 100 TeV colliders. For $t\bar{t}\gamma\gamma$ the discrimination power will be below 3$\sigma$ at the LHC, while for 33 TeV and 100 TeV colliders, more than 3$\sigma$ sensitivity can be reached.

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Xiao-Gang He, Guan-Nan Li, Ya-Juan Zheng. 2014-12-30. Probing Higgs Boson $CP$ Properties with $t\bar{t}H$ at the LHC and the 100 TeV $pp$ Collider. https://doi.org/10.1142/s0217751x15501560

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