| Article | |
| Report number | arXiv:1903.07725 ; CERN-TH-2019-027 ; DAMTP-2019-8 |
| Title | The $\hat{H}$-Parameter: An Oblique Higgs View |
| Author(s) | Englert, Christoph (SUPA, UK) ; Giudice, Gian F. (CERN) ; Greljo, Admir (CERN) ; Mccullough, Matthew (CERN ; Cambridge U., DAMTP) |
| Publication | 2019-09-06 |
| Imprint | 2019-03-18 |
| Number of pages | 33 |
| Note | V2: Discussion of convergence significantly extended. FCC-hh projections added |
| In: | JHEP 1909 (2019) 041 |
| DOI | 10.1007/JHEP09(2019)041 |
| Subject category | hep-ph ; Particle Physics - Phenomenology |
| Abstract | We study, from theoretical and phenomenological angles, the Higgs boson oblique parameter $\hat{H}$, as the hallmark of off-shell Higgs physics. $\hat{H}$ 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 K\"{a}ll\'{e}n-Lehmann representation. Phenomenologically, we demonstrate that the process $gg\to h^\ast \to VV$ is insensitive to propagator corrections from $\hat{H}$, 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. |
| Copyright/License | publication: (License: CC-BY-4.0) preprint: (License: arXiv nonexclusive-distrib 1.0) |
Corresponding record in: Inspire
レコード 生成： 2019-03-21, 最終変更： 2023-10-04
PDF