43 citations · 73 across the 5 of their papers we have counts for
5 papers
Anisotropy and chemical composition of ultra-high energy cosmic rays using arrival directions measured by the Pierre Auger Observatory
The Pierre Auger Collaboration, P. Abreu, M. Aglietta +490
The Pierre Auger Collaboration has reported evidence for anisotropy in the distribution of arrival directions of the cosmic rays with energies eV. Thes…
Preheating in Quintessential Inflation
A. H. Campos, H. C. Reis, R. Rosenfeld
We perform a numerical study of the preheating mechanism of particle production in models of quintessential inflation and compare it with the usual gravitational production mechani…
Bounds on Direct Couplings of Superheavy Metastable Particles to the Inflaton Field from Ultra High Energy Cosmic Ray Events
A. H. Campos, L. L. Lengruber, H. C. Reis +2
Top-down models for the origin of ultra high energy cosmic rays (UHECR's) propose that these events are the decay products of relic superheavy metastable particles, usually called…
Quantum Evolution of Inhomogeneities in Curved Space
H. C. Reis
We obtain the renormalized equations of motion for matter and semi-classical gravity in an inhomogeneous space-time. We use the functional Schrodinger picture and a simple Gaussian…
Quantum evolution of scalar fields in Robertson-Walker space-time
O. J. P. Eboli, H. C. Reis
We study the field theory in a flat Robertson-Walker space-time using the functional Schödinger picture. We introduce a simple Gaussian approximation to analyze the time evo…