Results 41 to 50 of about 3,754 (159)
Equations of motion, symmetry currents and EFT below the electroweak scale [PDF]
, 2018 The low-energy effective field theory is constructed by integrating out Standard Model states with masses proximate to the electroweak scale. We report the equations of motion for this theory, including corrections due to higher dimensional operators up ...
Helset, Andreas, Trott, Michael
core +2 more sources
Leading directions in the SMEFT
Journal of High Energy Physics, 2023 Abstract Short-distance new physics at (or slightly) above the TeV scale should not excessively violate the approximate flavor symmetries of the SM in order to comply with stringent constraints from flavor-changing neutral currents.
Admir Greljo, Ajdin Palavrić
openaire +3 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
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
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
The decay $h\to \gamma\gamma$ in the Standard-Model Effective Field Theory
, 2018 Assuming that new physics effects are parametrized by the Standard-Model Effective Field Theory (SMEFT) written in a complete basis of up to dimension-6 operators, we calculate the CP-conserving one-loop amplitude for the decay $h\to \gamma\gamma$ in ...
Dedes, A. +4 more
core +1 more source
Examining the neutrino option [PDF]
, 2018 The neutrino option is a scenario where the electroweak scale, and thereby the Higgs mass, is generated simultaneously with neutrino masses in the seesaw model.
Brivio, Ilaria, Trott, Michael
core +2 more sources
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
Consistent Searches for SMEFT Effects in Non-Resonant Dijet Events
, 2018 We investigate the bounds which can be placed on generic new-physics contributions to dijet production at the LHC using the framework of the Standard Model Effective Field Theory, deriving the first consistently-treated EFT bounds from non-resonant high ...
Alte, Stefan +2 more
core +1 more source