In the world of nuclear physics, protons often take the spotlight. But now, for the first time, the neutron has stepped into ...

"Measuring the spin-parity provides crucial insight into the internal quark dynamics and interaction mechanisms within the baryon," said Wan. They used sophisticated amplitude analysis techniques ...

A large and unexpected excess of top quark pairs has the physics community excited, but the interpretation is still up for debate.

But how these partons are arranged inside the nucleon, and how they add up to produce the nucleon’s spin, remains unclear. Past experiments showed that quark spins only account for about 20% to ...