SCOAP3 Repository 9 records found  Search took 0.02 seconds. 
1. Leading order CFT analysis of multi-scalar theories in d>2 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$d>2$$\end{document} / Codello, A. ; Safari, M. ; Vacca, G. P. ; Zanusso, O.
We investigate multi-field multicritical scalar theories using CFT constraints on two- and three-point functions combined with the Schwinger–Dyson equation. [...]
Published in EPJC 79 (2019) 331 10.1140/epjc/s10052-019-6817-1
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2. Backreaction of super-Hubble cosmological perturbations beyond perturbation theory / Brandenberger, Robert ; Graef, Leila L. ; Marozzi, Giovanni ; Vacca, Gian Paolo
We discuss the effect of super-Hubble cosmological fluctuations on the locally measured Hubble expansion rate. [...]
Published in Physical Review D 98 (2018) 10.1103/PhysRevD.98.103523 arXiv:1807.07494
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3. Uncovering novel phase structures in □k scalar theories with the renormalization group / Safari, M. ; Vacca, G. P.
We present a detailed version of our recent work on the RG approach to multicritical scalar theories with higher derivative kinetic term ϕ(-□)kϕ and upper critical dimension dc=2nk/(n-1) . [...]
Published in EPJC 78 (2018) 251 10.1140/epjc/s10052-018-5721-4
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4. Multicritical scalar theories with higher-derivative kinetic terms: A perturbative RG approach with the ε-expansion / Safari, M. ; Vacca, G. P.
We employ perturbative renormalization group and ε-expansion to study multicritical single-scalar field theories with higher derivative kinetic terms of the form ϕ()kϕ. [...]
Published in Phys. Rev. D 97 (2018) 10.1103/PhysRevD.97.041701 arXiv:1708.09795
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5. Functional perturbative RG and CFT data in the ϵ -expansion / Codello, A. ; Safari, M. ; Vacca, G. P. ; Zanusso, O.
We show how the use of standard perturbative RG in dimensional regularization allows for a renormalization group-based computation of both the spectrum and a family of coefficients of the operator product expansion (OPE) for a given universality class. [...]
Published in EPJC 78 (2018) 30 10.1140/epjc/s10052-017-5505-2
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6. The background scale Ward identity in quantum gravity / Percacci, Roberto ; Vacca, Gian Paolo
We show that with suitable choices of parametrization, gauge fixing and cutoff, the anomalous variation of the effective action under global rescalings of the background metric is identical to the derivative with respect to the cutoff, i.e. [...]
Published in EPJC 77 (2017) 52 10.1140/epjc/s10052-017-4619-x
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7. Renormalization group equation and scaling solutions for f ( R ) gravity in exponential parametrization / Ohta, Nobuyoshi ; Percacci, Roberto ; Vacca, Gian Paolo
We employ the exponential parametrization of the metric and a “physical” gauge fixing procedure to write a functional flow equation for the gravitational effective average action in an f ( R ) truncation. [...]
Published in EPJC 76 (2016) 46 10.1140/epjc/s10052-016-3895-1
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8. Asymptotic safety in O ( N ) scalar models coupled to gravity / Labus, Peter ; Percacci, Roberto ; Vacca, Gian Paolo
We extend recent results on scalar–tensor theories to the case of an O(N) -invariant multiplet. [...]
Published in Physics letters B (2015) 10.1016/j.physletb.2015.12.022
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9. Search of scaling solutions in scalar–tensor gravity / Percacci, Roberto ; Vacca, Gian Paolo
We write new functional renormalization group equations for a scalar nonminimally coupled to gravity. [...]
Published in EPJC 75 (2015) 188 10.1140/epjc/s10052-015-3410-0
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See also: similar author names
1 Vacca, G.
3 Vacca, Gian
5 Vacca, Gian Paolo
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