Englert, C. , Giudice, G. F., Greljo, A. and McCullough, M. (2019) The Ĥ-parameter: an oblique Higgs view. Journal of High Energy Physics, 2019(9), 41. (doi: 10.1007/JHEP09(2019)041)
|
Text
196678.pdf - Published Version Available under License Creative Commons Attribution. 808kB |
Abstract
We study, from theoretical and phenomenological angles, the Higgs boson oblique parameter Ĥ, as the hallmark of off-shell Higgs physics. Ĥ is defined as the Wilson coefficient of the sole dimension-6 operator that modifies the Higgs boson propagator, within a Universal EFT. Theoretically, we describe self-consistency conditions on Wilson coefficients, derived from the Källén-Lehmann representation. Phenomenologically, we demonstrate that the process gg → h∗ → V V is insensitive to propagator corrections from Ĥ, and instead advertise four-top production as an effective high-energy probe of off-shell Higgs behaviour, crucial to break flat directions in the EFT.
Item Type: | Articles |
---|---|
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Englert, Professor Christoph |
Authors: | Englert, C., Giudice, G. F., Greljo, A., and McCullough, M. |
College/School: | College of Science and Engineering > School of Physics and Astronomy |
Journal Name: | Journal of High Energy Physics |
Publisher: | Springer |
ISSN: | 1126-6708 |
ISSN (Online): | 1029-8479 |
Published Online: | 06 September 2019 |
Copyright Holders: | Copyright © 2019 The Authors |
First Published: | First published in Journal of High Energy Physics 9:41 |
Publisher Policy: | Reproduced under a Creative Commons License |
University Staff: Request a correction | Enlighten Editors: Update this record