Results 41 to 50 of about 4,794 (202)
Custodial symmetry violation in the SMEFT [PDF]
Physical Review D, 2021 35 pages + appendices, 7 ...
Graham D. Kribs +4 more
openaire +3 more sources
Flavour symmetries in the SMEFT [PDF]
Journal of High Energy Physics, 2020 Abstract We analyse how U(3)5 and U(2)5 flavour symmetries act on the Standard Model Effective Field Theory, providing an organising principle to classify the large number of dimension-six operators involving fermion fields. A detailed counting of such operators, at different order in the breaking terms of both these symmetries, is presented.
Gino Isidori +4 more
openaire +3 more sources
Higgs decays to two leptons and a photon beyond leading order in the SMEFT
SciPost Physics, 2022 We present the three-body decay of the Higgs boson into two leptons and a photon to dimension-eight in the Standard Model Effective Field Theory (SMEFT).
Tyler Corbett, Thor Rasmussen
doaj +1 more source
From models to SMEFT and back? [PDF]
SciPost Physics, 2022 We present a global analysis of the Higgs and electroweak sector, in the SMEFT framework and matched to a UV-completion. As the UV-model we use the triplet extension of the electroweak gauge sector. The matching is performed at one loop, employing functional methods. In the SFitter analysis, we pay particular attention to theory uncertainties
Brivio, Ilaria +7 more
openaire +5 more sources
Towards the one loop IR/UV dictionary in the SMEFT: One loop generated operators from new scalars and fermions [PDF]
SciPost Physics, 2023 Effective field theories offer a rationale to classify new physics models based on the size of their contribution to the effective Lagrangian, and therefore to experimental observables.
Guilherme Guedes +2 more
semanticscholar +1 more source
Two‐to‐Two Processes at an Electron‐Muon Collider
Advances in High Energy Physics, Volume 2022, Issue 1, 2022., 2022 Based on a recent proposal to build an electron‐muon collider, we study two‐to‐two production processes e−μ+⟶ff¯, γγ that originate from dimension 6 and 8 operators. We compare the sensitivity to those effective couplings obtained at the collider with that of low energy measurements of μ⟶eγ, μ⟶ee¯e, and μ⟶e conversion that have recently been reported ...
Antonio O. Bouzas +2 more
wiley +1 more source
On the Impact of the LHC Run 2 Data on General Composite Higgs Scenarios
Advances in High Energy Physics, Volume 2022, Issue 1, 2022., 2022 We study the impact of Run 2 LHC data on general composite Higgs scenarios, where nonlinear effects, mixing with additional scalars, and new fermionic degrees of freedom could simultaneously contribute to the modification of Higgs properties. We obtain new experimental limits on the scale of compositeness, the mixing with singlets and doublets with the
Charanjit K. Khosa +2 more
wiley +1 more source
Impact of dimension-eight SMEFT operators in the EWPO and Triple Gauge Couplings analysis in Universal SMEFT [PDF]
, 2023 17 pages and 3 ...
Tyler Corbett +5 more
openalex +3 more sources
Journal of High Energy Physics, 2022 Abstract We study the flavor structure of the lepton and baryon number-conserving dimension-6 operators in the Standard Model effective field theory (SMEFT). Building on the work of [1], we define several well-motivated flavor symmetries and symmetry-breaking patterns that serve as competing hypotheses about the ultraviolet (UV ...
Admir Greljo +2 more
openaire +6 more sources
The CKM parameters in the SMEFT [PDF]
Journal of High Energy Physics, 2019 Abstract The extraction of the Cabibbo-Kobayashi-Maskawa (CKM) matrix from flavour observables can be affected by physics beyond the Standard Model (SM). We provide a general roadmap to take this into account, which we apply to the case of the Standard Model Effective Field Theory (SMEFT).
Sébastien Descotes-Genon +6 more
openaire +7 more sources