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of 341
pro vyhledávání: '"OLIVEIRA, O. P."'
A conformal invariant QED-inspired model is solved for a general covariant linear gauge using the Dyson-Schwinger equations for the propagators assuming a pure vector like interaction. The leading corrections to the asymptotic solutions and the expon
Externí odkaz:
http://arxiv.org/abs/2408.13923
The Batalin-Vilkovisky function is a central component in the modern formulation of the background field method and the physical applications derived from it. In the present work we report on novel lattice results for this particular quantity, obtain
Externí odkaz:
http://arxiv.org/abs/2404.06496
Autor:
Correa, R. A. C., Dutra, A. de Souza, Frederico, T., Malomed, Boris A., Oliveira, O., Sawado, N.
Oscillons are time-dependent, localized in space, extremely long-lived states in nonlinear scalar-field models, while kinks are topological solitons in one spatial dimension. In the present work, we show new classes of oscillons and oscillating kinks
Externí odkaz:
http://arxiv.org/abs/1907.07145
Akademický článek
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The Dyson-Schwinger quark equation is solved for the quark-gluon vertex using the most recent lattice data available in the Landau gauge for the quark, gluon and ghost propagators, the full set of longitudinal tensor structures in the Ball-Chiu verte
Externí odkaz:
http://arxiv.org/abs/1807.10348
In this work, we report on the possibility of occurrence of oscillon configurations in the fourth state of matter. Oscillons are extremely long-lived, time-periodic, spatially-localised scalar field structures. Starting from a scalar field theory in
Externí odkaz:
http://arxiv.org/abs/1806.04412
An approximate dual representation for non-Abelian lattice gauge theories in terms of a new set of dynamical variables, the plaquette occupation numbers (PONs) that are natural numbers, is discussed. They are the expansion indices of the local series
Externí odkaz:
http://arxiv.org/abs/1703.07335
Publikováno v:
Phys. Rev. D 96, 074508 (2017)
We revisit the static potential for the $Q Q \bar Q \bar Q$ system using SU(3) lattice simulations, studying both the colour singlets groundstate and first excited state. We consider geometries where the two static quarks and the two anti-quarks are
Externí odkaz:
http://arxiv.org/abs/1702.07789
The Dirac equation in curved space is used to study the optical transmittance of deformed graphene along a given direction. Our theoretical analysis of the available experimental data for the light transmittance suggests that the periodic ripple asso
Externí odkaz:
http://arxiv.org/abs/1702.02846
The gluon propagator is investigated at finite temperature via lattice simulations. In particular, we discuss its interpretation as a massive-type bosonic propagator. Moreover, we compute the corresponding spectral density and study the violation of
Externí odkaz:
http://arxiv.org/abs/1611.04966