Results 41 to 50 of about 3,683 (143)
EWPD in the SMEFT to dimension eight
Journal of High Energy Physics, 2021 We calculate the O H † H 2 / Λ 4 $$ \mathcal{O}\left({\left\langle {H}^{\dagger }H\right\rangle}^2/{\Lambda}^4\right) $$ corrections to LEP electroweak precision data using the geometric formulation of the Standard Model Effective Field Theory (SMEFT ...
Tyler Corbett +3 more
doaj +1 more source
Anatomy of $\varepsilon'/\varepsilon$ beyond the Standard Model
, 2019 We present for the first time a model-independent anatomy of the ratio $\varepsilon'/\varepsilon$ in the context of the $\Delta S = 1$ effective theory with operators invariant under QCD and QED and in the context of the Standard Model Effective Field ...
Aebischer, Jason +3 more
core +1 more source
Indirect Signs of the Peccei-Quinn Mechanism [PDF]
, 2018 In the Standard Model, the renormalization of the QCD vacuum angle $\theta$ is extremely tiny, and small $\theta$ is technically natural. In the general Standard Model effective field theory (SMEFT), however, $\Delta\theta$ is quadratically divergent ...
de Vries, Jordy +4 more
core +2 more sources
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 +2 more
doaj +1 more source
The importance of flavor in SMEFT Electroweak Precision Fits
Journal of High Energy Physics, 2023 Effective field theory tools are essential for exploring non-Standard Model physics at the LHC in the absence of the discovery of new light particles.
Luigi Bellafronte +2 more
doaj +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. +3 more
core +1 more source
Field reparametrization in SMEFT [PDF]
The European Physical Journal Plus, 2017 Debate topic for effective field theory (EFT) is the choice of a “basis” for ${\rm dim}= 6$ operators. Clearly all bases are equivalent as long as they are a “basis”, containing a minimal set of operators ...
openaire +2 more sources
, 2022 Effective field theories, like the Standard Model Effective Field Theory (SMEFT), are defined by a chosen field content and a set of symmetries, up to a cut off scale $Λ$. Usually, in order to perform calculations, gauge independent field re-definitions consistent with the symmetries of the theory are then used to redefine the fields.
openaire +2 more sources
A package for renormalization group running in the SMEFT with sterile neutrinos
European Physical Journal C: Particles and FieldsSterile neutrinos are well-motivated beyond the Standard Model (BSM) particles. The Standard Model Effective Field Theory (SMEFT) augmented with these new fields is known as the $$\nu $$ ν SMEFT.
Jason Aebischer +2 more
doaj +1 more source
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 +4 more
doaj +1 more source