Results 61 to 70 of about 1,044 (153)

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

open access: yesEuropean 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   +4 more
doaj   +1 more source

Triboson production in the SMEFT

open access: yesJournal of High Energy Physics
Abstract We study the production of three electroweak gauge bosons at the LHC, in the effective field theory of the standard model, at dimension six and next-to-leading order in QCD. We present results for inclusive cross-sections and differential distributions, finding that these QCD corrections are large, often vary across the ...
Eugenia Celada   +3 more
openaire   +3 more sources

Use and reuse of SMEFT

open access: yes, 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

NNLO event generation for pp → Zh → ℓ + ℓ − b b ¯ $$ pp\to Zh\to {\mathrm{\ell}}^{+}{\mathrm{\ell}}^{-}b\overline{b} $$ production in the SM effective field theory

open access: yesJournal of High Energy Physics, 2022
We consider associated Zh production with Z → ℓ + ℓ − and h → b b ¯ $$ h\to b\overline{b} $$ decays in hadronic collisions. In the framework of the Standard Model effective field theory (SMEFT) we calculate the QCD corrections to this process and achieve
Ulrich Haisch   +4 more
doaj   +1 more source

Low-energy effective field theory below the electroweak scale: operators and matching

open access: yesJournal of High Energy Physics, 2018
The gauge-invariant operators up to dimension six in the low-energy effective field theory below the electroweak scale are classified. There are 70 Hermitian dimension-five and 3631 Hermitian dimension-six operators that conserve baryon and lepton number,
Elizabeth E. Jenkins   +2 more
doaj   +1 more source

Renormalization group equations for the SMEFT operators up to dimension seven

open access: yesJournal of High Energy Physics, 2023
In this paper, we propose a Green’s basis and also a new physical basis for dimension-seven (dim-7) operators, which are suitable for the matching of ultraviolet models onto the Standard Model effective field theory (SMEFT) and the deviation of ...
Di Zhang
doaj   +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

Future DUNE constraints on EFT

open access: yesJournal of High Energy Physics, 2018
In the near future, fundamental interactions at high-energy scales may be most efficiently studied via precision measurements at low energies. A universal language to assemble and interpret precision measurements is the so-called SMEFT, which is an ...
Adam Falkowski   +2 more
doaj   +1 more source

Renormalisation group effects on SMEFT interpretations of LHC data

open access: yesJournal of High Energy Physics, 2023
We explore the impact of Renormalisation Group (RG) effects in the Standard Model Effective Field Theory (SMEFT) interpretations of LHC measurements.
Rafael Aoude   +4 more
doaj   +1 more source

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

open access: yesJournal 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   +5 more sources

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