Lepton-lepton scattering has been observed for the first time at a hadron collider, as the CMS Collaboration at CERN announced a 5.4 sigma discovery using 446 inverse femtobarns of proton-proton ...

Scattering takes place across the universe at large and miniscule scales. Billiard balls clank off each other in bars, the nuclei of atoms collide to power the stars and create heavy elements, and ...

Researchers headed by Jürgen Volz and Arno Rauschenbeutel from the Department of Physics at the Humboldt University of Berlin, partners of the DAALI project, have gained new insights into the ...

Measuring up: an electron scattering experiment yields a small proton radius. (Courtesy: Jefferson Lab) For nearly a decade the size of the particle that makes up the bulk of the universe’s visible ...

A cloud of ultracold atoms is like a motel with a neon “no vacancy” sign. If a guest at the motel wants to switch rooms, they’re out of luck. No vacant rooms means there’s no choice but to stay put.

Particle physicists in the US have gained new insights into what happens when a high-energy photon scatters inelastically off a proton. According to perturbative quantum chromodynamics, the momentum ...