科学家提出中子星内有一种新的物质
There are six flavors of quarks—the up and down quarks that make up protons and neutrons, then four heavier ones that make up weirder particles, including the strange quarks. Some scientists, such as Edward Witten, have provided mathematical evidence that if you could get enough up, down, and strange quarks together, the resulting matter would prefer this quark-based state to the atomic one.
A new paper published by a team from the University of Toronto takes this idea even further. “Physicists have been searching for SQM for decades,” the researchers told Phys.org. “From our results, many searches may have been looking in the wrong place.”
Their calculations propose that maybe strange quarks aren’t required for quark-based matter to exist. Maybe, so long as the combined mass of the quarks is heavier than the heaviest elements in the periodic table, matter will prefer to exist in a state of solely up and down quarks. Such matter could possibly exist inside neutron stars, the incredibly dense stellar corpses thought to be made from neutrons. The team published their results recently in Physical Review Letters.
见：
Scientists Propose a New Kind of Matter Inside the Densest Stars
https://gizmodo.com/scientists-propose-a-new-kind-of-matter-inside-the-dens-1826928007
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