output
20062026
most citedObservation of the suppression of the flux of cosmic rays above 4x10^19eV

635 citations

60 papers

cond-mat.stat-mech2026

Thermodynamics and emergent thermomechanical response of a quantum ring with nonminimal spin--orbit coupling

João A. A. S. Reis, L. Lisboa-Santos, Edilberto O. Silva

We investigate the thermodynamic and emergent thermomechanical properties of fermions confined to a one-dimensional quantum ring with effective spin--orbit interactions induced by…

gr-qc2026

Gauge-covariant Raychaudhuri dynamics for spin-nondegenerate Lorentz-violating congruences

A. A. Araújo Filho, A. F. Santos, J. A. A. S. Reis +2

We investigate the Raychaudhuri dynamics of charged spin-nondegenerate Lorentz-violating particle congruences under minimal electromagnetic coupling. The coupling is introduced thr…

gr-qc2026

Thermodynamics and orbital structure of anti-de Sitter black holes in Palatini-inspired nonlinear electrodynamics

Edilberto O. Silva, João A. A. S. Reis, Faizuddin Ahmed

We construct a consistent anti-de Sitter completion of the static and spherically symmetric black-hole solution sourced by the Palatini-inspired nonlinear electrodynamics \(Y^n\) m…

hep-ph2026

Alternative classical Lagrangians for the Standard-Model Extension

João A. A. S. Reis, Marco Schreck, Ronaldo Thibes

The current paper introduces classical, relativistic Lagrangians for point-particle analogs to the field theory description of the Standard-Model Extension (SME) for Lorentz violat…

hep-th2025

On BRST-Related Symmetries in the FLPR Model with Gribov Ambiguities

Bhabani Prasad Mandal, Sumit Kumar Rai, Ronaldo Thibes

With a recent revival, novel features of the FLPR model have been reported in the literature. A connection between those features to QCD involving the Gribov problem is explored. W…

hep-th2025★ 1 cited

Fermions in -dimensions modified by nonminimal coupling and its applications to condensed matter physics

J. A. A. S. Reis, L. Lisboa-Santos, Fabiano M. Andrade +2

Fermions in two-dimensional space, commonly called -dimensional fermions, exhibit intriguing and distinctive characteristics that distinguish them from their higher-dimensio…