Does the proton decay? While this was a famous prediction of Grand Unified Theories (GUTS) developed in the 1970s and 1980s, experimentalists have ruled it out—or rather, put lower limits on its ...

In nuclear beta decay an up quark ‘u’ in a proton converts into an up down quark ‘d,’ turning the proton into a neutron and emitting a positron and a neutrino. This work affects ...

Beta decay involves the conversion of a down quark to an up quark. This changes a neutron into a proton plus an electron. The proton stays in the nucleus and the electron leaves the atom with high ...

Chadwick's own research focused on radioactivity. In 1919 Rutherford had discovered the proton, a positively charged particle within the atom's nucleus. But they and other researchers were finding ...

The emission of beta radiation provides evidence that neutrons and protons are made up of quarks. Beta (\(\beta^-\)) decay is the release of an electron by the change of a neutron to a proton.

Baryons consist of three quarks, and include protons and neutrons. In the latest work, researchers observed subtle differences between the decay rates of a particle called the beauty-lambda baryon ...