Results 81 to 90 of about 4,794 (202)

Tree-level UV completions for N R SMEFT d = 6 and d = 7 operators

Journal of High Energy Physics, 2023
We study ultra-violet completions for operators in standard model effective field theory extended with right-handed neutrinos (N R SMEFT). Using a diagrammatic method, we generate systematically lists of possible tree-level completions involving scalars,
Rebeca Beltrán, Ricardo Cepedello, Martin Hirsch   +2 more
doaj   +1 more source

LHC EFT WG note: SMEFT predictions, event reweighting, and simulation [PDF]

SciPost Physics Community Reports
This note provides a comprehensive overview of tools for predicting observables in the Standard Model effective field theory (SMEFT) at both tree level and one loop using event generators.
A. Belvedere, S. Bhattacharya, Giacomo Boldrini, S. Chatterjee, A. Calandri, Sergio S'anchez Cruz, Jennet Dickinson, F. Glessgen, R. Goldouzian, A. Grohsjean, L. Jeppe, Charlotte Knight, O. Mattelaer, K. Mohrman, H. Nelson, Vasilije Perović, M. Presilla, R. Schofbeck, Nick Smith   +18 more
semanticscholar   +1 more source

Analysis of General Power Counting Rules in Effective Field Theory [PDF]

, 2016
We derive the general counting rules for a quantum effective field theory (EFT) in $\mathsf{d}$ dimensions. The rules are valid for strongly and weakly coupled theories, and predict that all kinetic energy terms are canonically normalized. They determine
Gavela, M. B., Jenkins, E. E., Manohar, A. V., Merlo, L.   +3 more
core   +1 more source

Flavour violating effects of Yukawa running in SMEFT [PDF]

Journal of High Energy Physics, 2020
Abstract We study Yukawa Renormalization Group (RG) running effects in the context of the Standard Model Effective Theory (SMEFT). The Yukawa running being flavour dependent leads to RG-induced off-diagonal entries, so that initially diagonal Yukawa matrices at the high scale have to be rediagonalized at the electroweak (EW) scale.
Aebischer, Jason, Kumar, Jacky
openaire   +4 more sources

Constraining the SMEFT with Bayesian reweighting [PDF]

SciPost Physics, 2019
We illustrate how Bayesian reweighting can be used to incorporate the constraints provided by new measurements into a global Monte Carlo analysis of the Standard Model Effective Field Theory (SMEFT). This method, extensively applied to study the impact of new data on the parton distribution functions of the proton, is here validated by means of our ...
Samuel van Beek, Emanuele R. Nocera, Juan Rojo, Emma Slade   +3 more
openaire   +6 more sources

EFT Diagrammatica. Part II. Tracing the UV origin of bosonic D6 CPV and D8 SMEFT operators

Journal of High Energy Physics, 2022
In recent times, SMEFT, along with a superlative repertoire of theoretical and computational tools, has emerged as an efficacious platform to test the viability of proposed BSM scenarios. With symmetry as the backbone, higher mass dimensional (≥ 5) SMEFT
Wrishik Naskar, Suraj Prakash, Shakeel Ur Rahaman   +2 more
doaj   +1 more source

Higgs production in association with a top-antitop pair in the Standard Model Effective Field Theory at NLO in QCD [PDF]

, 2016
We present the results of the computation of the next-to-leading order QCD corrections to the production cross section of a Higgs boson in association with a top-antitop pair at the LHC, including the three relevant dimension-six operators ($O_{t \varphi
Maltoni, Fabio, Vryonidou, Eleni, Zhang, Cen   +2 more
core   +2 more sources

Top, Higgs, diboson and electroweak fit to the Standard Model effective field theory

Journal of High Energy Physics, 2021
The search for effective field theory deformations of the Standard Model (SM) is a major goal of particle physics that can benefit from a global approach in the framework of the Standard Model Effective Field Theory (SMEFT).
John Ellis, Maeve Madigan, Ken Mimasu, Veronica Sanz, Tevong You   +4 more
doaj   +1 more source

Yukawa enhancement of $Z$-mediated New Physics in $\Delta S = 2$ and $\Delta B = 2$ Processes

, 2017
We discuss Yukawa-enhanced contributions from $Z$-mediated new physics to down-type quark $\Delta F=2$ processes in the framework of the standard model gauge-invariant effective theory (SMEFT).
Bobeth, Christoph, Buras, Andrzej J., Celis, Alejandro, Jung, Martin   +3 more
core   +1 more source

Renormalization-group running of dimension-8 four-fermion operators in the SMEFT [PDF]

Physical Review D
We compute the renormalization-group equations governing the evolution of dimension-8 four-fermion operators in the Standard Model effective field theory (SMEFT). We describe the calculation and present analytic results for both the full flavor structure
R. Boughezal, Yingsheng Huang, F. Petriello   +2 more
semanticscholar   +1 more source