Results 31 to 40 of about 2,079 (110)

ALP — SMEFT interference [PDF]

, 2021
The Standard Model Effective Field Theory (SMEFT) offers a powerful theoretical framework for parameterizing the low-energy effects of heavy new particles with masses far above the scale of electroweak symmetry breaking.
Anne Mareike Galda, Renner, Sophie, Matthias Neubert, Sophie Renner, Neubert, Matthias, Galda, Anne Mareike   +5 more
core   +1 more source

Computing Tools for the SMEFT

, 2019
The increasing interest in the phenomenology of the Standard Model Effective Field Theory (SMEFT), has led to the development of a wide spectrum of public codes which implement automatically different aspects of the SMEFT for phenomenological ...
Brivio, Ilaria, others
core   +2 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

Uncovering the root of LEFT in SMEFT

, 2021
At energies below the electroweak scale, baryon number B and lepton number L violating processes are of significant importance in identifying the nature of UV extensions of the Standard Model.
S. Prakash, J. Chakrabortty, M. Spannowsky, S. U. Rahaman   +3 more
core   +1 more source

Top, Higgs, diboson and electroweak fit to the Standard Model effective field theory

Journal of High Energy Physics, 2021
The search for effective field theory deformations of the Standard Model (SM) is a major goal of particle physics that can benefit from a global approach in the framework of the Standard Model Effective Field Theory (SMEFT).
John Ellis, Maeve Madigan, Ken Mimasu, Veronica Sanz, Tevong You   +4 more
doaj   +1 more source

Visible GeV ALP from TeV Vector‐Like Leptons

Fortschritte der Physik, Volume 73, Issue 3, March 2025.
Abstract A model is presented where a GeV axion‐like‐particle (ALP) is predicted in a large portion of the parameter space due to the presence of explicit Peccei–Quinn (PQ) symmetry‐breaking terms in an exotic leptonic sector. The latter provides a solution to the muon g−2$g-2$ anomaly, within the framework of the Linear Seesaw neutrino mechanism.
Arturo de Giorgi, Marta Fuentes Zamoro, Luca Merlo   +2 more
wiley   +1 more source

The spurion massive EFT

Journal of High Energy Physics
We use the amplitude formulation of the SMEFT to introduce a spurion analysis of the SMEFT low-energy amplitudes in terms of the Higgs VEV. Each SMEFT contact-term is given as a sum of a few spurion structures, whose number depends on the electroweak ...
Julian L. Northey, Yael Shadmi, Yotam Soreq, Daiki Ueda   +3 more
doaj   +1 more source

A Lesson from RττK(*)$R_{\tau \tau }^{K^{(\ast )}}$ and RννK(*)$R_{\nu \nu }^{K^{(\ast )}}$ at Belle II

Fortschritte der Physik, Volume 72, Issue 1, January 2024.
Abstract Within the assumption of Left‐Handed (LH) New Physics (NP), the relations between B(B→K(*)τ+τ−)$\mathcal {B}(B\rightarrow K^{(\ast )} \tau ^+\tau ^-)$ and B(B→K(*)νν¯)$\mathcal {B}(B\rightarrow K^{(\ast )} \nu \bar{\nu })$ for several Beyond the Standard Model (BSM) scenarios are reviewed, commonly considered to explain the Lepton flavor ...
Arturo de Giorgi, Gioacchino Piazza
wiley   +1 more source

Top Quark Flavor Changing Couplings at a Muon Collider

Advances in High Energy Physics, Volume 2024, Issue 1, 2024.
There is growing interest in the development of a muon collider that would make it possible to produce lepton collisions at energies of several TeV. Among others, there can be significant contributions to electroweak gauge boson, Higgs boson, and top quark physics.
Daniel Ake, Antonio O. Bouzas, F. Larios, Roelof Bijker   +3 more
wiley   +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