Results 41 to 50 of about 620 (125)

The Higgs width in the SMEFT [PDF]

Journal of High Energy Physics, 2019
Abstract We calculate the total and partial inclusive Higgs widths at leading order in the Standard Model Effective Field Theory (SMEFT). We report results incorporating SMEFT corrections for two and four body Higgs decays through vector currents in this limit. The narrow width approximation is avoided and all phase space integrals
Ilaria Brivio, Tyler Corbett, Michael Trott   +2 more
openaire   +6 more sources

A package for renormalization group running in the SMEFT with sterile neutrinos

European Physical Journal C: Particles and Fields
Sterile 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, Tejhas Kapoor, Jacky Kumar   +2 more
doaj   +1 more source

Use and reuse of SMEFT

, 2020
In this work we address three questions: can we successfully describe (observed) deviations from the standard model in the SMEFT language? Can we learn something about the underlying, beyond the standard model, physics using the SMEFT language? If no deviation is observed, how to proceed?
David, André, Passarino, Giampiero
openaire   +2 more sources

Addendum to: Scheming in the SMEFT. . . and a reparameterization invariance! [PDF]

Journal of High Energy Physics, 2018
Abstract We allow two independent flavor contractions for the operator $$ {\mathcal{Q}}_{ll} $$ Q l l
Brivio, Ilaria, Trott, Michael
openaire   +3 more sources

EFT Diagrammatica. Part II. Tracing the UV origin of bosonic D6 CPV and D8 SMEFT operators

Journal of High Energy Physics, 2022
In recent times, SMEFT, along with a superlative repertoire of theoretical and computational tools, has emerged as an efficacious platform to test the viability of proposed BSM scenarios. With symmetry as the backbone, higher mass dimensional (≥ 5) SMEFT
Wrishik Naskar, Suraj Prakash, Shakeel Ur Rahaman   +2 more
doaj   +1 more source

More accurate σ GG → h , Γ h → GG AA Ψ ¯ Ψ $$ \sigma \left(\mathcal{GG}\to h\right),\Gamma \left(h\to \mathcal{GG},\mathcal{AA},\overline{\Psi}\Psi \right) $$ and Higgs width results via the geoSMEFT

Journal of High Energy Physics
We develop Standard Model Effective Field Theory (SMEFT) predictions of σ( GG $$ \mathcal{GG} $$ → h), Γ(h → GG $$ \mathcal{GG} $$ ), Γ(h → AA $$ \mathcal{AA} $$ ) to incorporate full two loop Standard Model results at the amplitude level, in conjunction
Adam Martin, Michael Trott
doaj   +1 more source

A framework for simultaneous fit of QCD and BSM parameters with xFitter

European Physical Journal C: Particles and Fields
An extension of the xFitter open-source program for QCD analyses is presented, allowing for a polynomial parameterization of the dependence of physical observables on theoretical parameters.
Xiao-Min Shen, Simone Amoroso, Jun Gao, Katerina Lipka, Oleksandr Zenaiev   +4 more
doaj   +1 more source

Froggatt-Nielsen meets the SMEFT

Journal of High Energy Physics
Abstract We study the matching of Froggatt-Nielsen theories of flavour onto the Standard Model Effective Field Theory (SMEFT), upon integrating out a heavy Beyond-the-Standard-Model (BSM) scalar ‘flavon’ whose vacuum expectation value breaks an Abelian flavour symmetry at energies ΛFN well above the electroweak scale, ΛFN
Eetu Loisa, Jim Talbert
openaire   +5 more sources

Connecting t-channel dark matter models to the Standard Model Effective Field Theory

Journal of High Energy Physics
We investigate the connection between simplified dark matter models featuring a t-channel scalar mediator and the Standard Model Effective Field Theory (SMEFT).
S. Biondini, L. Tiberi, O. Panella
doaj   +1 more source

Higgs associated production with a vector decaying to two fermions in the geoSMEFT

SciPost Physics
We present the inclusive calculations of a Higgs boson produced in association with massive vector bosons in the Standard Model Effective Field Theory (SMEFT) to order $1/\Lambda^4$ for the 13 TeV LHC.
Tyler Corbett, Adam Martin
doaj   +1 more source