办事指南

Hypothetical particle presents a fresh test for inflation

点击量:   时间:2019-03-14 06:09:01

By Michael Brooks INFLATION, one of the most important ideas in big bang cosmology, may have hit another stumbling block. The best explanation for how the newborn universe went through a period of ultrafast expansion has been under increasing scrutiny recently, after researchers found irregularities in the cosmic microwave background – the radiation left over from the big bang – that appeared to contradict some of the predictions of the simplest version of the model (New Scientist, 7 June, p 30). Now this model faces yet another challenge, this time linked to hypothetical particles called axions,