The Effective Field Theory of nonsingular cosmology
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DOI: 10.1007/jhep01(2017)090
Abstract: A bstractIn this paper, we explore the nonsingular cosmology within the framework of the Effective Field Theory (EFT) of cosmological perturbations. Due to the recently proved no-go theorem, any nonsingular cosmological models based on the… read more here.
Keywords: effective field; cosmology; field theory; nonsingular cosmology ... See more keywords
Effective field theory analysis of dark matter-standard model interactions with spin one mediators
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DOI: 10.1007/jhep02(2021)223
Abstract: We analyze interactions between dark matter and standard model particles with spin one mediators in an effective field theory framework. In this paper, we are considering dark particles masses in the range from a few… read more here.
Keywords: matter standard; dark matter; one mediators; standard model ... See more keywords
Braneworld effective field theories — holography, consistency and conformal effects
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DOI: 10.1007/jhep04(2020)016
Abstract: Braneworld theories are often described as low-energy effective field theories (EFTs) featuring an infinitely thin 3-brane and 4D fields exactly localized on it. We investigate whether an exactly localized braneworld can arise as a limit… read more here.
Keywords: effective field; field theories; braneworld effective; exactly localized ... See more keywords
Top-quark partial compositeness beyond the effective field theory paradigm
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DOI: 10.1007/jhep04(2020)040
Abstract: In theories of Partial Compositeness the top quark is a mixture of a composite and an elementary state, and as a consequence its interactions with gauge bosons are expected to deviate from those of a… read more here.
Keywords: effective field; partial compositeness; field theory; quark ... See more keywords
Long-lived sterile neutrinos at Belle II in effective field theory
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DOI: 10.1007/jhep04(2022)057
Abstract: Abstract Large numbers of τ leptons are produced at Belle II. These could potentially decay into sterile neutrinos that, for the mass range under consideration, are typically long-lived, leading to displaced-vertex signatures. Here, we study… read more here.
Keywords: long lived; effective field; field theory; sterile neutrinos ... See more keywords
Effective field theory of gravity to all orders
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DOI: 10.1007/jhep05(2020)083
Abstract: We construct the general effective field theory of gravity coupled to the Standard Model of particle physics, which we name GRSMEFT. Our method allows the systematic derivation of a non-redundant set of operators of arbitrary… read more here.
Keywords: field; effective field; gravity; field theory ... See more keywords
Low energy effective field theory operator basis at d ≤ 9
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DOI: 10.1007/jhep06(2021)138
Abstract: Abstract We obtain the complete operator bases at mass dimensions 5, 6, 7, 8, 9 for the low energy effective field theory (LEFT), which parametrize various physics effects between the QCD scale and the electroweak… read more here.
Keywords: low energy; effective field; energy effective; operator basis ... See more keywords
The decay h → γγ in the Standard-Model Effective Field Theory
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DOI: 10.1007/jhep08(2018)103
Abstract: A bstractAssuming 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… read more here.
Keywords: effective field; model effective; theory; standard model ... See more keywords
Non-relativistic and potential non-relativistic effective field theories for scalar mediators
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DOI: 10.1007/jhep08(2021)114
Abstract: Abstract Yukawa-type interactions between heavy Dirac fermions and a scalar field are a common ingredient in various extensions of the Standard Model. Despite of that, the non-relativistic limit of the scalar Yukawa theory has not… read more here.
Keywords: potential non; effective field; relativistic potential; non relativistic ... See more keywords
Point-particle effective field theory III: relativistic fermions and the Dirac equation
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DOI: 10.1007/jhep09(2017)007
Abstract: A bstractWe formulate point-particle effective field theory (PPEFT) for relativistic spin-half fermions interacting with a massive, charged finite-sized source using a first-quantized effective field theory for the heavy compact object and a second-quantized language for… read more here.
Keywords: effective field; point particle; field; source ... See more keywords
Perturbiner methods for effective field theories and the double copy
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DOI: 10.1007/jhep10(2018)018
Abstract: A bstractPerturbiner expansion provides a generating function for all Berends-Giele currents in a given quantum field theory. We apply this method to various effective field theories with and without color degrees of freedom. In the… read more here.
Keywords: effective field; double copy; field; field theories ... See more keywords