News in Brief Particle Physics

The proton’s weak side is just as feeble as physicists thought

Scientists make the most precise measurement yet of the particle’s weak charge

Q-weak experiment

WEAKEST LINK  A property of the proton is getting an update, thanks to an ultraprecise measurement of the particle’s weak charge by the Q-weak experiment (shown).

Jefferson Lab/DOE

By Emily Conover

- More than 2 years ago

Protons are no one-trick ponies. Although famous for their positive electric charge, the particles also carry an analogous, lesser-known charge, called the weak charge.