142 citations · 404 across the 7 of their papers we have counts for
7 papers
Primordial nucleosynthesis with a varying fine structure constant: An improved estimate
Kenneth M. Nollett, Robert E. Lopez
We compute primordial light-element abundances for cases with fine structure constant alpha different from the present value, including many sources of alpha dependence neglected i…
Probing Neutrino Properties with the Cosmic Microwave Background
Robert E. Lopez
Neutrinos that decay leave their imprint on the cosmic microwave background. We calculate the CMB anisotropy for the full range of decaying neutrino parameter space, and investigat…
Improved Treatment of Cosmic Microwave Background Fluctuations Induced by a Late-decaying Massive Neutrino
Manoj Kaplinghat, Robert E. Lopez, Scott Dodelson +1
A massive neutrino which decays after recombination (t > 10^{13} sec) into relativistic decay products produces an enhanced integrated Sachs-Wolfe effect, allowing constraints to b…
Precision Prediction for the Big-Bang Abundance of Primordial Helium
Robert E. Lopez, Michael S. Turner
Within the standard models of particle physics and cosmology we have calculated the big-bang prediction for the primordial abundance of \he to a theoretical uncertainty of less tha…
Probing Unstable Massive Neutrinos with Current Cosmic Microwave Background Observations
Robert E. Lopez, Scott Dodelson, Robert J. Scherrer +1
The pattern of anisotropies in the Cosmic Microwave Background depends upon the masses and lifetimes of the three neutrino species. A neutrino species of mass greater than 10 eV wi…
Precision Detection of the Cosmic Neutrino Background
Robert E. Lopez, Scott Dodelson, Andrew Heckler +1
In the standard Big Bang cosmology the canonical value for the ratio of relic neutrinos to CMB photons is 9/11. Within the framework of the Standard Model of particle physics there…