359 citations · 1.3k across the 23 of their papers we have counts for
4 papers · 1 filter
A speed limit on tachyon fields from cosmological and fine-structure data
J. D. F. Dias, Nils Schöneberg, Léo Vacher +2
The rolling tachyon is a non-canonical scalar field model well motivated in string theory which naturally predicts variations of the fine-structure constant. Such variations can in…
Scaling solutions for current-carrying cosmic string networks
F. C. N. Q. Pimenta, C. J. A. P. Martins
Cosmic string networks are the best motivated relics of cosmological phase transitions, being unavoidable in many physically plausible extensions of the Standard Model. Most studie…
Current and future cosmological impact of microwave background temperature measurements
C. J. A. P. Martins, A. M. M. Vieira
The redshift dependence of the cosmic microwave background temperature, , is a key prediction of standard cosmology, but this relation is violated in many extensions…
Cosmic Microwave Background Signatures from Current-carrying Cosmic Strings
I. Yu. Rybak, C. J. A. P. Martins, Patrick Peter +1
We continue our studies of the evolution and cosmological consequences of current-carrying cosmic string networks, described by a charge-velocity-dependent one scale (CVOS) model.…