197 citations · 742 across the 21 of their papers we have counts for
21 papers
Effective Potential in Finite Formulation of QFT
Sander Mooij, Mikhail Shaposhnikov
In recent works, we have shown how -point correlation functions in perturbative QFT can be computed without running into intermediate divergences. Here we want to illustrate exp…
Finite Callan-Symanzik renormalisation for multiple scalar fields
Sander Mooij, Mikhail Shaposhnikov
We study a finite, divergence free approach to renormalisation originally proposed in the early '70s by Blaer and Young, and Callan. It is based on equations similar to the Callan-…
QFT without infinities and hierarchy problem
Sander Mooij, Mikhail Shaposhnikov
The standard way to do computations in Quantum Field Theory (QFT) often results in the requirement of dramatic cancellations between contributions induced by a "heavy" sector into…
Hidden and explicit quantum scale invariance
Sander Mooij, Mikhail Shaposhnikov, Thibault Voumard
There exist renormalisation schemes that explicitly preserve the scale invariance of a theory at the quantum level. Imposing a scale invariant renormalisation breaks renormalisabil…
Unitarity and predictiveness in new Higgs inflation
Jacopo Fumagalli, Sander Mooij, Marieke Postma
In new Higgs inflation the Higgs kinetic terms are non-minimally coupled to the Einstein tensor, allowing the Higgs field to play the role of the inflaton. The new interaction is n…
Vanishing of local non-Gaussianity in canonical single field inflation
Rafael Bravo, Sander Mooij, Gonzalo A. Palma +1
We study the production of observable primordial local non-Gaussianity in two opposite regimes of canonical single field inflation: attractor (standard single field slow-roll infla…
A generalized non-Gaussian consistency relation for single field inflation
Rafael Bravo, Sander Mooij, Gonzalo A. Palma +1
We show that a perturbed inflationary spacetime, driven by a canonical single scalar field, is invariant under a special class of coordinate transformations together with a field r…
Disformal transformations as a change of units
Jacopo Fumagalli, Sander Mooij, Marieke Postma
A disformal transformation is a very useful tool to analyze a general effective theory description of inflation. It can for example be used to set the tensor sound speed to unity,…
Global adiabaticity and non-Gaussianity consistency condition
Antonio Enea Romano, Sander Mooij, Misao Sasaki
In the context of single-field inflation, the conservation of the curvature perturbation on comoving slices, , on super-horizon scales is one of the assumptions necessary to…
Consistency relations for sharp inflationary non-Gaussian features
Sander Mooij, Gonzalo A. Palma, Grigoris Panotopoulos +1
If cosmic inflation suffered tiny time-dependent deviations from the slow-roll regime, these would induce the existence of small scale-dependent features imprinted in the primordia…
Adiabaticity and gravity theory independent conservation laws for cosmological perturbations
Antonio Enea Romano, Sander Mooij, Misao Sasaki
We carefully study the implications of adiabaticity for the behavior of cosmological perturbations. There are essentially three similar but different definitions of non-adiabaticit…
Quantum corrections in Higgs inflation: the Standard Model case
Damien P. George, Sander Mooij, Marieke Postma
We compute the one-loop renormalization group equations for Standard Model Higgs inflation. The calculation is done in the Einstein frame, using a covariant formalism for the multi…
Consistency relations for sharp features in the primordial spectra
Sander Mooij, Gonzalo A. Palma, Grigoris Panotopoulos +1
We study the generation of sharp features in the primordial spectra within the framework of effective field theory of inflation, wherein curvature perturbations are the consequence…
Consistently violating the non-Gaussian consistency relation
Sander Mooij, Gonzalo A. Palma
Non-attractor models of inflation are characterized by the super-horizon evolution of curvature perturbations, introducing a violation of the non-Gaussian consistency relation betw…
Top-Goldstone coupling spoils renormalization of Higgs inflation
Damien P. George, Sander Mooij, Marieke Postma
We examine renormalization of Higgs inflation in the context of the full Standard Model. In the fermionic sector of the theory there is a parametrically large top-Goldstone couplin…
Quantum corrections in Higgs inflation: the real scalar case
Damien P. George, Sander Mooij, Marieke Postma
We present a critical discussion of quantum corrections, renormalisation, and the computation of the beta functions and the effective potential in Higgs inflation. In contrast with…
Gauge field production in SUGRA inflation: local non-Gaussianity and primordial black holes
Andrei Linde, Sander Mooij, Enrico Pajer
When inflation is driven by a pseudo-scalar field χcoupled to vectors as α/4 χF \tilde F, this coupling may lead to a copious production of gauge quanta, which in turns induces non…
Effective action for the Abelian Higgs model in FLRW
Damien P. George, Sander Mooij, Marieke Postma
We compute the divergent contributions to the one-loop action of the U(1) Abelian Higgs model. The calculation allows for a Friedmann-Lemaitre-Robertson-Walker space-time and a tim…
Sgoldstino inflation
Ana Achúcarro, Sander Mooij, Pablo Ortiz +1
We discuss the possibility that inflation is driven by the sgoldstino, the superpartner of the goldstino. Unlike in generic supergravity scenarios, the sgoldstino decouples from al…
Goldstone bosons and a dynamical Higgs field
Sander Mooij, Marieke Postma
Higgs inflation uses the gauge variant Higgs field as the inflaton. During inflation the Higgs field is displaced from its minimum, which results in associated Goldstone bosons tha…
Hybrid inflation with moduli stabilization and low scale supersymmetry breaking
Sander Mooij, Marieke Postma
We study the supergravity hybrid inflation model of Ref.[1] in the presence of a modulus field. The eta-problem is solved by a shift symmetry for the inflaton, which protects the i…