GOSWAMI, R YAJNIK, UA

Reheating phase of inflationary Universe can be modeled by parameters T-reh, (omega) over bar (reh) and N-reh, which can be constrained by the scalar spectral amplitude A(s) and the scalar spectral index n(s). On the other hand the low multipole anomalies in the CMB can be modeled by suitable features in the inflaton potential. We show that the par...

Dudal, David Vercauteren, David

The Landau background gauge, also known as the Landau-DeWitt gauge, has found renewed interest during the past decade given its usefulness in accessing the confinement-deconfinement transition via the vacuum expectation value of the Polyakov loop, describable via an appropriate background. In this Letter, we revisit this gauge from the viewpoint of...

Capri, MAL Fiorentini, D Guimaraes, MS Mintz, BW Palhares, LF Sorella, SP Dudal, David Figueiredo Justo, Igor Pereira, AD Sobreiro, RF
...

In this paper, we discuss the gluon propagator in the linear covariant gauges in D = 2, 3, 4 Euclidean dimensions. Nonperturbative effects are taken into account via the so-called refined Gribov-Zwanziger framework. We point out that, as in the Landau and maximal Abelian gauges, for D = 3, 4, the gluon propagator displays a massive (decoupling) beh...

Cucchieri, Attilio Dudal, David Mendes, Tereza Vandersickel, Nele

We present an analytic description of numerical results for the ghost propagator G(p(2)) in the minimal Landau gauge on the lattice. The data were produced in the SU(2) case using the largest lattice volumes to date, for d = 2, 3 and 4 spacetime dimensions. Our proposed form for G(p(2)) is derived from the one-loop relation between ghost and gluon ...

Mertens, Thomas Verschelde, Henri Zakharov, Valentin I.

We analyze the string spectrum of flat space in polar coordinates, following the small curvature limit of the cigar CFT. We first analyze the partition function of the cigar itself, making some clarifications of the structure of the spectrum that have escaped attention up to this point. The superstring spectrum (type 0 and type II) is shown to exhi...

Capri, MAL Fiorentini, D Guimaraes, MS Mintz, BW Palhares, LF Sorella, SP Dudal, David Figueiredo Justo, Igor Pereira, AD Sobreiro, RF
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We point out the existence of a nonperturbative exact nilpotent BRST symmetry for the Gribov-Zwanziger action in the Landau gauge. We then put forward a manifestly BRST invariant resolution of the Gribov gauge fixing ambiguity in the linear covariant gauge.

Mertens, Thomas Verschelde, Henri Zakharov, Valentin I

In this paper, we discuss Rindler space string thermodynamics from a thermal scalar point of view as an explicit example of the results obtained in [1]. We discuss the critical behavior of the string gas and interpret this as a random walk near the black hole horizon. Combining field theory arguments with the random walk path integral picture, we r...

Capri, MAL Dudal, David Guimarães, MS Justo, IF Sorella, SP Vercauteren, D

Capri, MAL Dudal, David Guimaraes, MS Justo, IF Sorella, SP Vercauteren, D

We study the structure of the gauge propagators of a 3d version of the electroweak interaction in terms of the Higgs vacuum expectation value., of the non-Abelian gauge coupling g, and of the Abelian gauge coupling g', when nonperturbative effects related to the non-Abelian gauge fixing are introduced by means of an adapted path integral measure. I...

Dubois, Thomas Allaert, Georges Witlox, Frank