Physicists have struggled for seven decades with the question of why there is more matter in the universe than antimatter.

They measured quark mixing through superallowed nuclear beta decay, a highly precise and fast type of beta decay where a proton in one nucleus changes into a neutron (or vice versa) without ...

Beta (\(\beta^-\)) decay is the release of an electron by the change of a neutron to a proton. The neutron (charge = 0) is made up of one up quark (charge = \(\frac{2}{3}\)) and two down quarks ...