Better Higgs-CP Tests Through Information Geometry
Abstract
Measuring the CP symmetry in the Higgs sector is one of the key tasks of the LHC and a crucial ingredient for precision studies, for example in the language of effective Lagrangians. We systematically analyze which LHC signatures offer dedicated CP measurements in the Higgs-gauge sector, and discuss the nature of the information they provide. Based on the Fisher information measure, we compare the maximal reach for CP-violating effects in weak boson fusion, associated ZH production, and Higgs decays into four leptons. We find a subtle balance between more theory-independent approaches and more powerful analysis channels, indicating that rigorous evidence for CP violation in the Higgs-gauge sector will likely require a multi-step process.
Cite
@article{arxiv.1712.02350,
title = {Better Higgs-CP Tests Through Information Geometry},
author = {Johann Brehmer and Felix Kling and Tilman Plehn and Tim M. P. Tait},
journal= {arXiv preprint arXiv:1712.02350},
year = {2018}
}
Comments
27 pages, 8 figures