Results 1 to 10 of about 994 (116)

Dimension-8 SMEFT matching conditions for the low-energy effective field theory [PDF]

open access: diamondJournal of High Energy Physics, 2023
In particle physics, the modern view is to categorize things in terms of effective field theories (EFTs). Above the weak scale, we have the SMEFT, formed when the heavy new physics (NP) is integrated out, and for which the Standard Model (SM) is the ...
Serge Hamoudou   +2 more
doaj   +2 more sources

SIMUnet: an open-source tool for simultaneous global fits of EFT Wilson coefficients and PDFs. [PDF]

open access: yesEur Phys J C Part Fields
We present the open-source SIMUnet code, designed to fit Standard Model Effective Field Theory (SMEFT) Wilson coefficient alongside Parton Distribution Functions (PDFs) of the proton. SIMUnet can perform SMEFT global fits, as well as simultaneous fits of
PBSP Collaboration   +8 more
europepmc   +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 [PDF]

open access: diamondJournal 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   +2 more sources

Dimension-8 SMEFT contact-terms for vector-pair production via on-shell Higgsing [PDF]

open access: diamondJournal of High Energy Physics
We derive the dimension-8 standard-model effective theory (SMEFT) contact terms relevant for vector-pair production at the LHC and lepton colliders.
Jared M. Goldberg   +2 more
doaj   +2 more sources

A global analysis of the SMEFT under the minimal MFV assumption [PDF]

open access: diamondJournal of High Energy Physics
We present comprehensive global fits of the SMEFT under the minimal minimal flavour violation (MFV) hypothesis, i.e. assuming that only the flavour-symmetric and CP-invariant operators are relevant at the high scale.
Riccardo Bartocci   +2 more
doaj   +2 more sources

Higgs decays to two leptons and a photon beyond leading order in the SMEFT

open access: yesSciPost 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

SMEFT as a slice of HEFT’s parameter space [PDF]

open access: yesEPJ Web of Conferences, 2022
The Standard Model Effective Field Theory (SMEFT) is the parametrization chosen to interpret many modern measurements. We have recently discussed, building on the work of other groups, that its overall framework can be experimentally tested, beyond ...
Salas-Bernárdez Alexandre   +3 more
doaj   +1 more source

Two‐to‐Two Processes at an Electron‐Muon Collider

open access: yesAdvances 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

Mapping the SMEFT to discoverable models

open access: yesJournal of High Energy Physics, 2022
The matching of specific new physics scenarios onto the SMEFT framework is a well-understood procedure. The inverse problem, the matching of the SMEFT to UV scenarios, is more difficult and requires the development of new methods to perform a systematic ...
Ricardo Cepedello   +3 more
doaj   +1 more source

On the Impact of the LHC Run 2 Data on General Composite Higgs Scenarios

open access: yesAdvances 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

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