Results 71 to 80 of about 4,794 (202)
Combining chromomagnetic and four-fermion operators with leading SMEFT operators for gg → hh at NLO QCD [PDF]
Journal of High Energy Physics, 2023 We present the calculation of the contribtuions from the chromomagnetic and four-top-quark-operators within Standard Model Effective Field Theory (SMEFT) to Higgs boson pair production in gluon fusion, combined with QCD corrections that are at NLO with ...
Gudrun Heinrich, Jannis Lang
semanticscholar +1 more source
Uncovering the root of LEFT in SMEFT [PDF]
Europhysics Letters, 2021 Abstract At energies below the electroweak scale, baryon number B and lepton number L violating processes are of significant importance in identifying the nature of UV extensions of the Standard Model. The imprint of UV theories on low-energy measurements can be calculated to a high accuracy using the theoretical framework of the Low ...
J. Chakrabortty +3 more
openaire +4 more sources
A global analysis of axion-like particle interactions using SMEFT fits
Journal of High Energy Physics, 2023 In the presence of axions or axion-like particles (ALPs) that couple to the Standard Model via dimension-five interactions, dimension-six SMEFT interactions are generated via renormalization-group evolution.
Anke Biekötter +3 more
doaj +1 more source
Renormalisation group effects in SMEFT for di-Higgs production [PDF]
SciPost PhysicsWe study the effects of renormalisation group running for the Wilson coefficients of dimension-6 operators contributing to Higgs boson pair production in gluon fusion within Standard Model Effective Field Theory (SMEFT).
Gudrun Heinrich, Jannis Lang
semanticscholar +1 more source
Dimension-8 Operators in the Standard Model Effective Field Theory
, 2021 We present a complete basis of dimension-8 operators in the Standard Model Effective Field Theory. Attention is paid to operators that vanish in the absence of flavor structure. The 44,807 operators are encoded in 1,029 Lagrangian terms.
Murphy, Christopher W.
core +1 more source
Relevance of one-loop SMEFT matching in the 2HDM [PDF]
Physical Review DThe Two-Higgs Doublet Model (2HDM) is a well understood alternative to the Standard Model of particle physics. If the new particles included in the 2HDM are at an energy scale much greater than the weak scale, the theory can be matched to the Standard ...
S. Das Bakshi +3 more
semanticscholar +1 more source
Shift-type SMEFT effects in dileptons at the LHC [PDF]
Journal of High Energy Physics, 2021 Abstract We explore the constraints which can be derived on Wilson coefficients in the Standard Model Effective Field Theory from dilepton production, notably including the constraints on operators which do not lead to cross sections growing with energy relative to the Standard Model rate, i.e. shifts.
Horne, Alyssa +4 more
openaire +5 more sources
, 2020 This is the first paper of our systematic efforts on lepton number violating (LNV) hadronic decays in the effective field theory approach. These decays provide information complementary to popular nuclear neutrinoless double-$\beta$ ($0\nu\beta\beta ...
Liao, Yi, Ma, Xiao-Dong, Wang, Hao-Lin
core +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