Characterizing the 125 GeV Higgs is a critical component of the physics program at the LHC Run II. In this Letter, we consider ttˉH associated production in the dileptonic mode. We demonstrate that the difference in azimuthal angle between the leptons from top decays can directly reveal the CP-structure of the top-Higgs coupling with the sensitivity of the measurement substantiality enhanced in the boosted Higgs regime. We first show how to access this channel via H→bbˉ jet-substructure tagging, then demonstrate the ability of the new variable to measure CP. Our analysis includes all signal and background samples simulated via the MC@NLO algorithm including hadronization and underlying-event effects. Using boosted Higgs substructure with dileptonic tops, we find that the top-Higgs coupling strength and the CP structure can be directly probed with achievable luminosity at the 13 TeV LHC.
@article{arxiv.1507.07926,
title = {Boosting the Direct CP Measurement of the Higgs-Top Coupling},
author = {Matthew R. Buckley and Dorival Goncalves},
journal= {arXiv preprint arXiv:1507.07926},
year = {2016}
}
Comments
v1: 6 pages, 5 figures and 1 table; v2: matches the PRL version