Results 141 to 150 of about 4,794 (202)

The decay $h\to \gamma\gamma$ in the Standard-Model Effective Field Theory

, 2018
Assuming that new physics effects are parametrized by the Standard-Model Effective Field Theory (SMEFT) written in a complete basis of up to dimension-6 operators, we calculate the CP-conserving one-loop amplitude for the decay $h\to \gamma\gamma$ in ...
Dedes, A., Paraskevas, M., Rosiek, J., Suxho, K., Trifyllis, L.   +4 more
core   +1 more source

High-pT LHC constraints on SMEFT operators affecting rare kaon and hyperon decays [PDF]

Journal of High Energy Physics
We consider the constraints on new physics affecting rare kaon and hyperon decay as parametrized by a low energy effective theory that can be obtained from high-pT observables at LHC. To this end, we match the relevant low energy Wilson coefficients onto
Arnab Roy, German Valencia
semanticscholar   +1 more source

Walls, bubbles and doom — the cosmology of HEFT

Journal of High Energy Physics
As experiment charts new territory at the electroweak scale, the enterprise to characterise all possible theories becomes all the more necessary. In the absence of new particles, this ambitious enterprise is attainable and has led to the Higgs Effective ...
R. Alonso, J.C. Criado, R. Houtz, M. West   +3 more
doaj   +1 more source

Impact of dimension-eight SMEFT contributions: A case study [PDF]

, 2021
S. Dawson, Samuel Homiller, M. Sullivan
openalex   +1 more source

RGE effects on new physics searches via gravitational waves

Journal of High Energy Physics
Gravitational wave (GW) observations offer a promising probe of new physics associated with a first-order electroweak phase transition. Precision studies of the Higgs potential, including Fisher matrix analyses, have been extensively conducted in this ...
Katsuya Hashino, Daiki Ueda
doaj   +1 more source

A methodology for theory uncertainties in the SMEFT

, 2021
A process specific methodology is defined to systematically assign theoretical uncertainties in the Standard Model Effective Field Theory when performing leading order global fits. The method outlined also minimises the computational and theoretical burden to systematically advance such analyses to dimension eight.
openaire   +2 more sources

Matching for FCNC effects in the flavour-symmetric SMEFT

Journal of High Energy Physics, 2019
We calculate the complete tree and one-loop matching of the dimension-six Standard Model Effective Field Theory (SMEFT) with unbroken U(3)5 flavour symmetry to the operators of the Weak Effective Theory (WET) which are responsible for flavour changing ...
Tobias Hurth, Sophie Renner, William Shepherd   +2 more
doaj   +1 more source

M W helps select Z ' models for b → s ℓ ℓ anomalies. [PDF]

Eur Phys J C Part Fields, 2022
Allanach B, Davighi J.
europepmc   +1 more source

A proof of concept for matchete: an automated tool for matching effective theories. [PDF]

Eur Phys J C Part Fields, 2023
Fuentes-Martín J, König M, Pagès J, Thomsen AE, Wilsch F.   +4 more
europepmc   +1 more source

Going beyond Top EFT

Journal of High Energy Physics
We present a new way to interpret Top Standard Model measurements going beyond the SMEFT framework. Instead of the usual paradigm in Top EFT, where the main effects come from tails in momenta distributions, we propose an interpretation in terms of new ...
André Lessa, Verónica Sanz
doaj   +1 more source