My thoughts on what the Hubble tension really is, based on George Efstathiou’s “To H0 or not to H0?“, arXiv:2103.08723.
This week’s entry deals with new measurements of the Deuterium-to-Helium-3 cross-section with extremely important implications for Big Bang Nucleosynthesis, and two papers on axion-photon conversion (and vice-versa) in astrophysical environments. A heads-up that next week’s blog installment will likely be cancelled due to personal reasons (see here). Enjoy!
With a week of delay due to Italian bureaucracy-induced commitments, my Week 17 summaries are now out. There is a new entry in terms of topics covered, i.e. the thorny issue of naturalness in particle physics and cosmology (besides two papers covering limits on the duration of inflation, and independent inferences of the baryon energy density from Planck). As always, comments are very welcome!
