Results 31 to 40 of about 4,206 (182)

The Standard Model as an Effective Field Theory [PDF]

, 2018
Projecting measurements of the interactions of the known Standard Model (SM) states into an effective field theory (EFT) framework is an important goal of the LHC physics program.
Brivio, Ilaria, Trott, Michael
core   +2 more sources

Drell-Yan SMEFT at NLO [PDF]

Proceedings of 42nd International Conference on High Energy Physics — PoS(ICHEP2024)
Luigi Bellafronte
openalex   +2 more sources

Complete One-Loop Matching for a Singlet Scalar in the Standard Model EFT [PDF]

, 2018
We present the results of the first complete one-loop matching calculation between the real singlet scalar extension of the Standard Model and the Standard Model effective field theory (SMEFT) at dimension six.
Craig, Nathaniel, Jiang, Minyuan, Li, Ying-Ying, Sutherland, Dave   +3 more
core   +2 more sources

Lectures on SMEFT

The European Physical Journal C, 2023
AbstractThis document contains lectures on SMEFT, which is an effective field theory of the degrees of freedom of the Standard Model. The material is at a basic, introductory level, without assuming any prior knowledge of effective field theory techniques.
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

Flavourful SMEFT likelihood for Higgs and electroweak data

Journal of High Energy Physics, 2020
We perform an updated fit to LHC Higgs data and LEP electroweak precision tests in the framework of the Standard Model Effective Field Theory (SMEFT). We assume a generic structure of the SMEFT operators without imposing any flavour symmetries.
Adam Falkowski, David Straub
doaj   +1 more source

A global analysis of axion-like particle interactions using SMEFT fits

Journal of High Energy Physics, 2023
In the presence of axions or axion-like particles (ALPs) that couple to the Standard Model via dimension-five interactions, dimension-six SMEFT interactions are generated via renormalization-group evolution.
Anke Biekötter, Javier Fuentes-Martín, Anne Mareike Galda, Matthias Neubert   +3 more
doaj   +1 more source

SMEFT calculations for the LHC [PDF]

Proceedings of The Ninth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2021), 2021
This talk summarizes the status of calculations in the Standard Model Effective Field Theory and gives an overview of the computational techniques that are most commonly employed in order to make predictions for LHC processes in this framework.
openaire   +2 more sources

Effective field theory approach to lepton number violating decays $K^\pm\rightarrow \pi^\mp l^{\pm}l^{\pm}$: short-distance contribution

, 2020
This is the first paper of our systematic efforts on lepton number violating (LNV) hadronic decays in the effective field theory approach. These decays provide information complementary to popular nuclear neutrinoless double-$\beta$ ($0\nu\beta\beta ...
Liao, Yi, Ma, Xiao-Dong, Wang, Hao-Lin
core   +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, James Talbert
openalex   +6 more sources