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10 papers · 1 filter
Factorizing two-loop vacuum sum-integrals
Andrei I. Davydychev, Pablo Navarrete, York Schröder
We derive analytic results for scalar massless bosonic vacuum sum-integrals at two loops. Building upon a recent factorization proof of massive two-loop vacuum integrals, we are ab…
Magnetic field dependence of the neutral pion longitudinal screening mass in the linear sigma model with quarks
Alejandro Ayala, Ricardo L. S. Farias, L. A. Hernández +4
We use the linear sigma model with quarks to study the magnetic-field-induced modifications on the longitudinal screening mass for the neutral pion at one-loop level. The effects o…
Well-posedness and numerical analysis of an elapsed time model with strongly coupled neural networks
Mauricio Sepulveda, Nicolas Torres, Luis Miguel Villada
The elapsed time equation is an age-structured model that describes the dynamics of interconnected spiking neurons through the elapsed time since the last discharge, leading to man…
Non-Gaussian statistics of de Sitter spectators: A perturbative derivation of stochastic dynamics
Gonzalo A. Palma, Spyros Sypsas
Scalar fields interacting with the primordial curvature perturbation during inflation may communicate their statistics to the latter. This situation motivates the study of how the…
The Yukawa potential under weak magnetic field
Fabio L. Braghin, Marcelo Loewe, Cristian Villavicencio
Weak magnetic field induced corrections for the Yukawa potential due to one pion exchange between two constituent quarks (nucleons) are presented. For that, the constant magnetic f…
Nucleon axial-vector coupling constant in magnetar environments
C. A. Dominguez, Marcelo Loewe, Cristian Villavicencio +1
The nucleon axial-vector coupling constant is studied in the presence of an external magnetic field, and in dense nuclear environments, to emulate nuclear matter in magnetars…