Based on a vector triplet model we study a possible failure of dimension-6 operators in describing LHC Higgs kinematics. First, we illustrate that including dimension-6 contributions squared can significantly improve the agreement between the full model and the dimension-6 approximation, both in associated Higgs production and in weak-boson-fusion Higgs production. Second, we test how a simplified model with an additional heavy scalar could improve the agreement in critical LHC observables. In weak boson fusion we find an improvement for virtuality-related observables at large energies, but at the cost of sizeable deviations in interference patterns and angular correlations.
@article{arxiv.1602.05202,
title = {Pushing Higgs Effective Theory over the Edge},
author = {Anke Biekötter and Johann Brehmer and Tilman Plehn},
journal= {arXiv preprint arXiv:1602.05202},
year = {2016}
}
Comments
19 pages. v2: references added. v3: minor corrections, more references added, matches published version