Results 51 to 60 of about 1,585 (136)

Towards the ultimate differential SMEFT analysis [PDF]

Journal of High Energy Physics, 2020
Abstract We obtain SMEFT bounds using an approach that utilises the complete multi-dimensional differential information of a process. This approach is based on the fact that at a given EFT order, the full angular distribution in the most important electroweak processes can be expressed as a sum of a fixed number of basis functions.
Banerjee, Shankha, Gupta, Rick S., Reiness, Joey Y., Seth, Satyajit, Spannowsky, Michael   +4 more
openaire   +4 more sources

Flavour symmetries in the SMEFT [PDF]

Journal of High Energy Physics, 2020
Abstract We analyse how U(3)5 and U(2)5 flavour symmetries act on the Standard Model Effective Field Theory, providing an organising principle to classify the large number of dimension-six operators involving fermion fields. A detailed counting of such operators, at different order in the breaking terms of both these symmetries, is presented.
Faroughy, Darius A, Isidori, Gino, Wilsch, Felix, Yamamoto, Kei   +3 more
openaire   +3 more sources

Tree-level UV completions for N R SMEFT d = 6 and d = 7 operators

Journal of High Energy Physics, 2023
We study ultra-violet completions for operators in standard model effective field theory extended with right-handed neutrinos (N R SMEFT). Using a diagrammatic method, we generate systematically lists of possible tree-level completions involving scalars,
Rebeca Beltrán, Ricardo Cepedello, Martin Hirsch   +2 more
doaj   +1 more source

Modular symmetry in the SMEFT

Physical Review D, 2022
We study the modular symmetric standard-model effective field theory. We employ the stringy Ansatz on coupling structure that 4-point couplings $y^{(4)}$ of matter fields are written by a product of 3-point couplings $y^{(3)}$ of matter fields, i.e., $y^{(4)} = y^{(3)}y^{(3)}$.
Tatsuo Kobayashi, Hajime Otsuka, Morimitsu Tanimoto, Kei Yamamoto   +3 more
openaire   +3 more sources

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

SMEFT Treatment for the Higgs Boson with the ATLAS Experiment [PDF]

, 2022
The Run-2 of the LHC sets the stage to scrutinize the Standard Model Effective Field Theory (SMEFT). SMEFT provides a theoretically well-defined framework to consistently interpret measurements of different processes, to search for indirect effects of ...
Balasubramanian, Rahul
core  

SMEFT restrictions on exclusive b → uℓν decays [PDF]

, 2023
Exclusive semileptonic b hadron decays (b → uℓν) serve as a sandbox for probing strong and electroweak interactions and for extracting the CKM element V$_{ub}$.
Smolkovič, Aleks, Peter Stangl, Jakub Salko, Admir Greljo, Greljo, Admir, Stangl, Peter, Aleks Smolkovič, Salko, Jakub   +7 more
core   +1 more source

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

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

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