Results 81 to 90 of about 4,206 (182)

$b\to c\tau\nu$ Transitions in the Standard Model Effective Field Theory

open access: yes, 2019
The $R(D^{(\ast)})$ anomalies observed in $B\to D^{(\ast)}\tau\nu$ decays have attracted much attention in recent years. In this paper, we study the $B\to D^{(\ast)}\tau\nu$, $\Lambda_b\to\Lambda_c\tau\nu$, $B_c\to (J/\psi,\,\eta_c)\tau\nu$, $B\to X_c ...
Hu, Quan-Yi   +2 more
core   +1 more source

Effective field theory interpretation of lepton magnetic and electric dipole moments

open access: yesJournal of High Energy Physics, 2021
We perform a model-independent analysis of the magnetic and electric dipole moments of the muon and electron. We give expressions for the dipole moments in terms of operator coefficients of the low-energy effective field theory (LEFT) and the Standard ...
Jason Aebischer   +5 more
doaj   +1 more source

Putting SMEFT Fits to Work

open access: yes, 2020
The Standard Model Effective Field Theory (SMEFT) provides a consistent framework for comparing precision measurements at the LHC to the Standard Model. The observation of statistically significant non-zero SMEFT coefficients would correspond to physics beyond the Standard Model (BSM) of some sort.
Dawson, Sally   +2 more
openaire   +2 more sources

A case study of SMEFT O 1 / Λ 4 $$ \mathcal{O}\left(1/{\Lambda}^4\right) $$ effects in diboson processes: pp → W ±(ℓ ± ν)γ

open access: yesJournal of High Energy Physics
In this paper we explore pp → W ± (ℓ ± ν)γ to O 1 / Λ 4 $$ \mathcal{O}\left(1/{\Lambda}^4\right) $$ in the SMEFT expansion. Calculations to this order are necessary to properly capture SMEFT contributions that grow with energy, as the interference ...
Adam Martin
doaj   +1 more source

SMEFT interpretation of $\Delta F = 2$ transitions

open access: yesProceedings of 11th International Workshop on the CKM Unitarity Triangle — PoS(CKM2021), 2023
Comment: 7 pages, 2 figures, Contribution to the proceedings of the 11th International Workshop on the CKM Unitarity Triangle (CKM2021), 22-26 November ...
openaire   +2 more sources

Holomorphy without supersymmetry in the Standard Model Effective Field Theory

open access: yesPhysics Letters B, 2014
The anomalous dimensions of dimension-six operators in the Standard Model Effective Field Theory (SMEFT) respect holomorphy to a large extent. The holomorphy conditions are reminiscent of supersymmetry, even though the SMEFT is not a supersymmetric ...
Rodrigo Alonso   +2 more
doaj   +1 more source

NLO Standard model effective field theory for Higgs and EW precision data [PDF]

open access: yes, 2016
A set of constructs, definitions, and propositions that present a systematic view of the Standard Model Effective Field Theory (SMEFT), i.e. how the influence of higher energy processes is localizable in a few structural properties which can be captured ...
Passarino, Giampiero
core   +1 more source

Constraints on standard model effective field theory for a Higgs boson produced in association with W or Z bosons in the H → b b ¯ $$ \textrm{b}\overline{\textrm{b}} $$ decay channel in proton-proton collisions at s $$ \sqrt{s} $$ = 13 TeV

open access: yesJournal of High Energy Physics
A standard model effective field theory (SMEFT) analysis with dimension-six operators probing nonresonant new physics effects is performed in the Higgs-strahlung process, where the Higgs boson is produced in association with a W or Z boson, in proton ...
The CMS collaboration   +2382 more
doaj   +1 more source

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