Results 11 to 20 of about 1,585 (136)
SMEFT at NNLO+PS: Vh production [PDF]
Journal of High Energy PhysicsIn the context of the Standard Model effective field theory (SMEFT) the next-to-next-to-leading (NNLO) QCD corrections to the Higgsstrahlungs (Vh) processes in hadronic collisions are calculated and matched to a parton shower (PS).
Ulrich Haisch +2 more
exaly +7 more sources
Journal of High Energy Physics, 2021 There are two canonical approaches to treating the Standard Model as an Effective Field Theory (EFT): Standard Model EFT (SMEFT), expressed in the electroweak symmetric phase utilizing the Higgs doublet, and Higgs EFT (HEFT), expressed in the broken ...
Timothy Cohen +3 more
doaj +6 more sources
European Physical Journal C: Particles and Fields, 2023 This work is based on a bottom-up approach to the standard-model effective field theory (SMEFT), resulting in an equiprobable space of Wilson coefficients.
Federico Camponovo, Giampiero Passarino
doaj +6 more sources
smelli – the SMEFT Likelihood [PDF]
Proceedings of Tools for High Energy Physics and Cosmology — PoS(TOOLS2020), 2021 I present the Python package smelli that implements a global likelihood function in the space of dimension-six Wilson coefficients in the Standard Model Effective Field Theory (SMEFT). The likelihood includes contributions from a large number of flavor and other precision observables, currently 399 in total.
Peter Stangl, Stangl, Peter
openaire +5 more sources
ALP — SMEFT interference [PDF]
Journal of High Energy Physics, 2021 Abstract 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. Additional light degrees of freedom extend the effective theory.
Galda, Anne Mareike +2 more
openaire +6 more sources
Adding Flavor to the SMEFT [PDF]
Journal of High Energy Physics, 2022 Abstract We study the flavor structure of the lepton and baryon number-conserving dimension-6 operators in the Standard Model effective field theory (SMEFT). Building on the work of [1], we define several well-motivated flavor symmetries and symmetry-breaking patterns that serve as competing hypotheses about the ultraviolet (UV ...
Admir Greljo +2 more
openaire +6 more sources
On the non-minimal character of the SMEFT [PDF]
Physics Letters B, 2017 When integrating out unknown new physics sectors, what is the minimal character of the Standard Model Effective Field Theory (SMEFT) that can result? In this paper we focus on a particular aspect of this question: “How can one obtain only one dimension ...
Yun Jiang, Michael Trott
doaj +8 more sources
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.
Adam Falkowski, Falkowski, Adam
openaire +5 more sources
Froggatt-Nielsen meets the SMEFT [PDF]
Journal of High Energy PhysicsAbstract 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, Jim Talbert
core +14 more sources
Uncovering the root of LEFT in SMEFT [PDF]
Europhysics Letters, 2021 Abstract 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. The imprint of UV theories on low-energy measurements can be calculated to a high accuracy using the theoretical framework of the Low ...
J. Chakrabortty +3 more
openaire +4 more sources