For the first time, scientists have observed a collection of particles, also known as a quasiparticle, that's massless when moving one direction but has mass in the other direction. The quasiparticle, ...

For 16 years, scientists hypothesized the existence of a quasi-particle called a semi-Dirac fermion, named after mathematician Paul Dirac whose eponymous equation describes these fermions. Now, a new ...

Add Yahoo as a preferred source to see more of our stories on Google. On a navy blue background is the book cover of 'The One Thing You Need to Know: 21 Key Scientific Concepts of the 21st Century' by ...

“We weren’t even looking for a semi-Dirac fermion,” said Yinming Shao, a physics professor and lead author on the study. “We were seeing signatures we didn’t understand — and it turns out we had made ...

James Bjorken of Stanford University and Curtis Callan of Princeton University have been awarded the 2004 Dirac Medal for their work on the theory of the strong interaction. The award is made every ...

John Iliopoulos of the Ecole Normale Supérieure in Paris and Luciano Maiani of the Università degli Studi di Roma have been awarded the 2007 Dirac medal. Iliopoulos and Maiani each win $5,000 “for ...