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8 papers · 2 filters
Stability of the normal vacuum in multi-Higgs-doublet models
A. Barroso, P. M. Ferreira, R. Santos +1
We show that the vacuum structure of a generic multi-Higgs-doublet model shares several important features with the vacuum structure of the two and three Higgs-doublet model. In pa…
Photon acceleration in vacuum
J. T. Mendonca, M. Marklund, P. K. Shukla +1
A new process associated with the nonlinear optical properties of the electromagnetic vacuum, as predicted by quantum electrodynamics, is described. This can be called photon accel…
Complex CKM from Spontaneous CP Violation Without Flavor Changing Neutral Current
G. C. Branco, R. N. Mohapatra
We analyse the general constraints on unified gauge models with spontaneous CP breaking that satisfy the conditions that (i) CP violation in the quark sector is described by a real…
Confinement of monopole field lines in a superconductor at T=/=0
Marco Cardoso, Pedro Bicudo, Pedro D. Sacramento
We apply the Bogoliubov-de Gennes equations to the confinement of a monopole-antimonopole pair in a superconductor. This is related to the problem of a quark-antiquark pair bound b…
Percolation of color sources and critical temperature
J. Dias de Deus, C. Pajares
We argue that clustering of color sources, leading to the percolation transition, may be the way to achieve deconfinement in heavy ion collisions. The critical density for percolat…
Mesons and tachyons with confinement and chiral restoration, and NA60
P. Bicudo
In this paper the spectrum of quark-antiquark systems, including light mesons and tachyons, is studied in the true vacuum and in the chiral invariant vacuum. The mass gap equation…