5 papers
A short course in general relativity
James M. Cline
These notes give a concise introduction to General Relativity at the advanced undergraduate level, starting from the weak field limit and gravitational waves, then introducing curv…
"Neutrinoless double beta decay" is the correct name for neutrinoless double beta decay
James M. Cline
Recently arxiv:2604.12897 urged that the terminology "neutrinoless double beta decay" should be changed to "Majorana double beta decay" to properly give credit to Majorana, and to…
Neutrinos as Dark Matter
James M. Cline, Gonzalo Herrera, Jean-Samuel Roux
Active neutrinos in standard cosmology were ruled out as a dark matter candidate in the 1980's. The reason is twofold: they are too light to account for the observed energy density…
Comment on "Dynamical Dark Energy at Late Time CDM"
James M. Cline
In arXiv:2505.18900 it was claimed that an apparent evolution of the dark energy equation of state occurs within the standard CDM cosmological model. I point out that this erro…
Comment on "Dark Energy from Time Crystals"
James M. Cline
It was recently proposed (arxiv:2502.08887) that the time crystal Lagrangian introduced by Shapere and Wilczek in 2012 could be a model of dark energy. I point out that the model h…