16 Result(s)
within
Leonardo Senatore
English
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Article
Open AccessNon-analyticity of the S-matrix with spontaneously broken Lorentz invariance
We study the S-matrix of Goldstones in the renormalizable theory of a U(1) complex scalar at finite charge, i.e. in a state that breaks Lorentz invariance. The theory is weakly coupled so that this S-matrix exist...
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Open AccessEfficiently evaluating loop integrals in the EFTofLSS using QFT integrals with massive propagators
We develop a new way to analytically calculate loop integrals in the Effective Field Theory of Large Scale-Structure. Previous available methods show severe limitations beyond the one-loop power spectrum due t...
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Open AccessPositivity bounds on effective field theories with spontaneously broken Lorentz invariance
We derive positivity bounds on EFT coefficients in theories where boosts are spontaneously broken. We employ the analytic properties of the retarded Green’s function of conserved currents (or of the stress-ene...
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Asymptotic Behavior of Cosmologies with \(\Lambda >0\) in \(2+1\) Dimensions
We study, using mean curvature flow methods, \(2+1\) 2 + 1 dimensional cosmologies with a positive cosmological constant and matter satisfying the dominant and the strong energy conditions. If the spatial s...
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Open AccessAn effective formalism for testing extensions to General Relativity with gravitational waves
The recent direct observation of gravitational waves (GW) from merging black holes opens up the possibility of exploring the theory of gravity in the strong regime at an unprecedented level. It is therefore in...
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Open AccessThe Supersymmetric Effective Field Theory of Inflation
We construct the Supersymmetric Effective Field Theory of Inflation, that is the most general theory of inflationary fluctuations when time-translations and supersymmetry are spontaneously broken. The non-line...
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Open AccessThe cosmological Higgstory of the vacuum instability
The Standard Model Higgs potential becomes unstable at large field values. After clarifying the issue of gauge dependence of the effective potential, we study the cosmological evolution of the Higgs field in p...
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Open AccessAnomalous dimensions and non-gaussianity
We analyze the signatures of inflationary models that are coupled to interacting field theories, a basic class of multifield models also motivated by their role in providing dynamically small scales. Near the ...
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Open AccessThe constancy of ζ in single-clock Inflation at all loops
Studying loop corrections to inflationary perturbations, with particular emphasis on infrared factors, is important to understand the consistency of the inflationary theory, its predictivity and to establish t...
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Open AccessOn loops in inflation II: IR effects in single clock inflation
In single clock models of inflation the coupling between modes of very different scales does not have any significant dynamical effect during inflation. It leads to interesting projection effects. Larger and s...
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Open AccessThe effective field theory of cosmological large scale structures
Large scale structure surveys will likely become the next leading cosmological probe. In our universe, matter perturbations are large on short distances and small at long scales, i.e. strongly coupled in the U...
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Open AccessOn loops in inflation III: time independence of ζ in single clock inflation
Studying loop corrections to inflationary perturbations, with particular emphasis on infrared factors, is important to understand the consistency of the inflationary theory, its predictivity and to establish t...
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Open AccessUniversality of the volume bound in slow-roll eternal inflation
It has recently been shown that in single field slow-roll inflation the total volume cannot grow by a factor larger than \( {e^{{S_{dS}}/2}} \) ...
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Open AccessThe effective field theory of multifield inflation
We generalize the Effective Field Theory of Inflation to include additional light scalar degrees of freedom that are in their vacuum at the time the modes of interest are crossing the horizon. In order to make...
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Open AccessDissipative effects in the effective field theory of inflation
We generalize the effective field theory of single clock inflation to include dissipative effects. Working in unitary gauge we couple a set of composite operators,
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On loops in inflation
We study loop corrections to correlation functions of inflationary perturbations. Previous calculations have found that in certain theories the two-point function can have a logarithmic running of the form log(k/
