Results 51 to 60 of about 3,754 (159)
, 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
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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 +3 more
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Fortschritte der Physik, Volume 72, Issue 1, January 2024.Abstract Within the assumption of Left‐Handed (LH) New Physics (NP), the relations between B(B→K(*)τ+τ−)$\mathcal {B}(B\rightarrow K^{(\ast )} \tau ^+\tau ^-)$ and B(B→K(*)νν¯)$\mathcal {B}(B\rightarrow K^{(\ast )} \nu \bar{\nu })$ for several Beyond the Standard Model (BSM) scenarios are reviewed, commonly considered to explain the Lepton flavor ...
Arturo de Giorgi, Gioacchino Piazza
wiley +1 more source
Uniting low-energy semileptonic and hadronic anomalies within SMEFT
Journal of High Energy PhysicsTwo categories of four-fermion SMEFT operators are semileptonic (two quarks and two leptons) and hadronic (four quarks). At tree level, an operator of a given category contributes only to processes of the same category.
Alakabha Datta +3 more
doaj +1 more source
SmeftFR -- Feynman rules generator for the Standard Model Effective Field Theory
, 2019 We present SmeftFR, a Mathematica package designed to generate the Feynman rules for the Standard Model Effective Field Theory (SMEFT) including the complete set of gauge invariant operators up to dimension~6.
Dedes, A. +4 more
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Top Quark Flavor Changing Couplings at a Muon Collider
Advances in High Energy Physics, Volume 2024, Issue 1, 2024.There is growing interest in the development of a muon collider that would make it possible to produce lepton collisions at energies of several TeV. Among others, there can be significant contributions to electroweak gauge boson, Higgs boson, and top quark physics.
Daniel Ake +3 more
wiley +1 more source
Leptonic CP violation in the charged sector and effective field theory approach
, 2017 These proceedings introduce the main techniques and ideas for a systematic effective field theory analysis of CP violation in the charged lepton sector. This study is required because the Standard Model of particle physics predicts a very high degree of ...
Pruna, Giovanni Marco
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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 +2 more
core +2 more sources