theoretical physics

There is five times more dark matter in the universe than plain old “normal” matter— the atoms and molecules that make up the familiar world. Yet, it is still unknown what this dominant dark component actually is. An international collaboration of scientists has now inaugurated the new XENON1T instrument designed to search for dark matter… Read more

An international team used America’s most powerful supercomputer, Titan, to compute the neutron distribution and related observables of calcium-48, an isotope with an atomic nucleus consisting of 20 protons and 28 neutrons. Computing the nucleus from first principles revealed that the difference between the radii of neutron and proton distributions (called the “neutron skin“) is… Read more