A bstract We consider gravitational production of singlet fermions such as sterile neutrinos during and after inflation. The efficiency due to classical gravity is suppressed by the fermion mass. Quantum effects, on other hand, are expected break conformal invariance sector Planck scale-suppressed operators irrespective find that very efficient in immediately inflation, generating a significant background stable or long-lived feebly interacting particles. This applies, particular, which can...

We perform an old school, one-loop renormalization of the Abelian-Higgs model in Unitary and $R_\xi$ gauges, focused on scalar potential gauge boson mass. Our goal is to demonstrate this simple context validity at quantum level, which could open way for until now (mostly) avoided framework loop computations. indeed find that consistent equivalent level $\beta$-functions. Then we compare renormalized, finite, Higgs two gauges again equivalence. This equivalence needs not only a complete...

With no evidence of any exotic particle detected so far beyond the Standard Model, new physics may lie above presently accessible energies at colliders and, low-energies, can be accounted for via an effective description. The interplay flavour and Higgs data allows setting stringent bounds on parameters Lagrangian. In this paper, we focus Z2-symmetric two doublet models near decoupling limit: corresponding description relies only a few parameters, thus predicting many interesting...

Abstract We construct the zero temperature (no compact dimensions) effective action for an SU (2) Yang–Mills theory in five dimensions, with boundary conditions that reduce symmetry on four-dimensional located at origin to a U (1)-complex scalar system. In order be sensitive Higgs phase, we need include higher dimensional operators action, which can naturally achieved by generating it expanding corresponding lattice construction small spacing, taking naive continuum limit and then...

A bstract We study the vacuum dynamics of pseudo-Nambu-Goldstone bosons (pNGBs) for SO( N + 1) → ) spontaneous and explicit symmetry breaking. determine magnitude breaking consistent with an EFT description effective potential at zero finite temperatures. expose clarify novel additional transitions that can arise generic pNGBs below initial scale breaking, which may have phenomenological relevance. In this respect, two scenarios are analyzed: thermal supercooled dark sector pNGBs. scenario...

We propose a setup for the origin of dark matter based on spacetime with warped extra dimension and three branes: Planck brane, TeV at (few) scale <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msub><a:mrow><a:mi>ρ</a:mi></a:mrow><a:mrow><a:mi>T</a:mi></a:mrow></a:msub></a:mrow></a:math>, (sub-)GeV <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msub><c:mi>ρ</c:mi><c:mn>1</c:mn></c:msub><c:mo>≲</c:mo><c:mn>100</c:mn><c:mtext>...

We initiate the continuum description of a non-perturbative 5d lattice Yang-Mills model with 4d boundaries using $\varepsilon$-expansion. In its simplest version classically bulk has an $SU(2)$ gauge symmetry and on boundary there is Abelian-Higgs system zero scalar potential. part I we compute Renormalization Group flows related quantities in limit where decouples from bulk.

We present a systematic derivation of the form correlators N operators in Conformal Field Theory d&gt;2 dimensions and exchange-symmetry constraints that functions dimensionless cross-ratios obey for N&gt;3.

Abstract Using arguments from holography we propose that the deviation of cosmological spectral index $$n_S$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>n</mml:mi> <mml:mi>S</mml:mi> </mml:msub> </mml:math> scalar fluctuations unity may be controlled almost entirely by critical exponent $$\eta $$ <mml:mi>η</mml:mi> $$d=3$$ <mml:mrow> <mml:mi>d</mml:mi> <mml:mo>=</mml:mo> <mml:mn>3</mml:mn> </mml:mrow> Ising model.

We propose a setup for the origin of dark matter based on spacetime with warped extra dimension and three branes: Planck brane, TeV at (few) scale $\rho_T$, (sub)-GeV $\rho_1\lesssim 100$ GeV $\ll\rho_T$. The Standard Model is localized in thus solving Higgs hierarchy problem, while $\chi$, Dirac fermion mass $m_\chi<\rho_1$, brane. radion, $m_r<m_\chi$, interacts strongly ($\sim m_\chi/\rho_1\sim\mathcal O(1)$) very weakly m_{f}\rho_1/\rho_T^2\ll 1$) $f$. generic conflict between bounds its...

Abstract In models with large extra dimensions, “miniature” black holes (BHs) might be produced in high-energy proton–proton collisions at the Large Hadron Collider (LHC). semi-classical regime, those BHs thermally decay, giving rise to large-multiplicity final states jets and leptons. On other hand, similar are also expected production of electroweak sphaleron/instanton-induced processes. We investigate whether one can discriminate these scenarios when BH or sphaleron-like events observed...

We discuss the role of higher dimensional operators in spontaneous breaking internal symmetry and scale invariance, context Lorentz invariant scalar field theory. Using $\varepsilon$-expansion we determine phase diagrams demonstrate that (un)stable RG flows computed with a certain basis dimension 6 Lagrangian, map to another related first by redefinitions. Crucial is presence reparametrization ghosts if Ostrogradsky appear.

Using arguments from holography we propose that the deviation of cosmological spectral index $n_S$ scalar fluctuations unity may be controlled almost entirely by critical exponent $η$ $d = 3$ Ising model

Generalized Effective Field Theory (GEFT) is the non-renormalizable extension of an where Wilson coefficients are endowed by their own, independent scale dependence. Such effective theory can be constructed quantizing a Lagrangian in presence all internal symmetry respecting operators any mass dimension. The resulting may practically useful regimes its phase diagram perturbative expansion and truncation infinite tower Higher Dimensional Operators (HDO) valid. massless limit GEFT especially...

With no evidence of any exotic particle detected so far beyond the Standard Model, new physics may lie above presently accessible energies at colliders and, low-energies, can be accounted for via an effective description. The interplay flavour and Higgs data allows setting stringent bounds on parameters Lagrangian. In this paper, we focus $Z_2$-symmetric two doublet models near decoupling limit: corresponding description relies only a few parameters, thus predicting many interesting...

We consider a real scalar field in de Sitter background and compute its thermal propagators.&#x0D; propose that dS/CFT context, non-trivial effects as seen by an `out&amp;#039; observer can be encoded the anomalous dimensions of d=3 Ising model.&#x0D; One these dimensions, critical exponent eta, fixes completely number cosmological observables, which we compute.

We consider a real scalar field in de Sitter background and compute its thermal propagators. propose that dS/CFT context, nontrivial effects as seen by an ‘out’ observer can be encoded the anomalous dimensions of d=3 Ising model. One these dimensions, critical exponent η, completely fixes number cosmological observables, which we compute.

We study the vacuum dynamics of pseudo-Nambu-Goldstone bosons (pNGBs) for $SO(N+1) \rightarrow SO(N)$ spontaneous and explicit symmetry breaking. determine magnitude breaking consistent with an EFT description effective potential at zero finite temperatures. expose clarify novel additional transitions that can arise generic pNGBs below initial scale breaking, which may have phenomenological relevance. In this respect, two scenarios are analyzed: thermal supercooled dark sector pNGBs....

We consider gravitational production of singlet fermions such as sterile neutrinos during and after inflation. The efficiency due to classical gravity is suppressed by the fermion mass. Quantum effects, on other hand, are expected break conformal invariance sector Planck scale-suppressed operators irrespective find that very efficient in immediately inflation, generating a significant background stable or long-lived feebly interacting particles. This applies, particular, which can constitute...

In models with large extra dimensions, "miniature" black holes (BHs) might be produced in high-energy proton-proton collisions at the Large Hadron Collider (LHC). semi-classical regime, those BHs thermally decay, giving rise to large-multiplicity final states jets and leptons. On other hand, similar are also expected production of electroweak sphaleron/instanton-induced processes. We investigate whether one can discriminate these scenarios when BH or sphaleron-like events observed LHC using...

We consider a real scalar field in de Sitter background and compute its thermal propagators. propose that dS/CFT context, non-trivial effects as seen by an 'out' observer can be encoded the anomalous dimensions of $d = 3$ Ising model. One these dimensions, critical exponent $η$, fixes completely number cosmological observables, which we