CERN Accelerating science

Preprint
Report number	arXiv:2203.06771
Title	Theoretical developments in the SMEFT at dimension-8 and beyond
Author(s)	Alioli, Simone (INFN, Milan Bicocca) ; Boughezal, Radja (Argonne) ; Cao, Weiguang (Tokyo U., IPMU ; Tokyo U.) ; Chala, Mikael (Granada U., Theor. Phys. Astrophys.) ; Díaz-Carmona, Álvaro (Granada U., Theor. Phys. Astrophys.) ; Bakshi, Supratim Das (Granada U., Theor. Phys. Astrophys.) ; Durieux, Gauthier (CERN) ; Gráf, Lukáš (UC, Berkeley ; UC, San Diego) ; Guedes, Guilherme (Granada U., Theor. Phys. Astrophys.) ; Henning, Brian Quinn (EPFL, Lausanne, LPTP) ; Kitahara, Teppei (KMI, Nagoya ; Marseille, CPT ; Mainz U.) ; Li, Hao-Lin (Louvain U., CP3) ; Lu, Xiaochuan (Oregon U.) ; Machado, Camila S. (DESY) ; Martin, Adam (Notre Dame U.) ; Melia, Tom (Tokyo U., IPMU) ; Mereghetti, Emanuele (Los Alamos) ; Murayama, Hitoshi (Tokyo U., IPMU ; UC, Berkeley) ; Murphy, Christopher W. ; Nepveu, Jasper Roosmale (Humboldt U., Berlin) ; Pal, Sridip (Princeton, Inst. Advanced Study) ; Petriello, Frank (Argonne) ; Shadmi, Yael (Technion) ; Shu, Jing (Beijing, Inst. Theor. Phys. ; HIAS, UCAS, Hangzhou) ; Weiss, Yaniv ; Xiao, Ming-Lei (Argonne) ; Yu, Jiang-Hao (Beijing, Inst. Theor. Phys. ; HIAS, UCAS, Hangzhou)
Imprint	2022-03-13
Number of pages	37
Note	37 pages, 6 figures; contribution to Snowmass 2021; new section and additional authors
Presented at	2021 Snowmass Summer Study, Seattle, WA, United States, 11 - 20 July 2021, pp.
Subject category	hep-ph ; Particle Physics - Phenomenology
Abstract	In this contribution to the Snowmass 2021 process we review theoretical developments in the Standard Model Effective Field Theory (SMEFT) with a focus on effects at the dimension-8 level and beyond. We review the theoretical advances that led to the complete construction of the operator bases for the dimension-8 and dimension-9 SMEFT Lagrangians. We discuss the possibility of obtaining all-orders results in the $1/\Lambda$ expansion for certain SMEFT observables as well as the current status of renormalization group running and implications for positivity, and briefly present the on-shell approach to constructing SMEFT amplitudes. Finally we present several new phenomenological effects that first arise at dimension-8 and discuss the impact of these terms on experimental analyses.
Other source	Inspire
Copyright/License	preprint: (License: CC BY 4.0)