I think the author should have written "pre-big-bang-nucleosynthesis" ("pre-BBN"), since the paper is about the appearance of a particular type of zero-spin par

I think the author should have written "pre-big-bang-nucleosynthesis" ("pre-BBN"), since the paper is about the appearance of a particular type of zero-spin particle at the end of inflation but before BBN, and forming the whole of the non-neutrino dark matter sector. Some more details at my two comments above: https://news.ycombinator.com/item?id=20663162 https://news.ycombinator.com/item?id=20663162 https://news.ycombinator.com/item?id=20663475 https://news.ycombinator.com/item?id=20663475