Theoretical developments in the SMEFT at dimension-8 and beyond

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 th...

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Detalles Bibliográficos
Autores principales: Alioli, Simone, Boughezal, Radja, Cao, Weiguang, Chala, Mikael, Díaz-Carmona, Álvaro, Bakshi, Supratim Das, Durieux, Gauthier, Gráf, Lukáš, Guedes, Guilherme, Henning, Brian Quinn, Kitahara, Teppei, Li, Hao-Lin, Lu, Xiaochuan, Machado, Camila S., Martin, Adam, Melia, Tom, Mereghetti, Emanuele, Murayama, Hitoshi, Murphy, Christopher W., Nepveu, Jasper Roosmale, Pal, Sridip, Petriello, Frank, Shadmi, Yael, Shu, Jing, Weiss, Yaniv, Xiao, Ming-Lei, Yu, Jiang-Hao
Lenguaje:eng
Publicado: 2022
Materias:
hep-ph
Particle Physics - Phenomenology
Acceso en línea:http://cds.cern.ch/record/2805286
Descripción
Sumario: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.

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