Our universe is governed by four fundamental forces. At least that's what physicists have long thought. Now, however, new research suggests that there's a fifth force, a discovery that could upend ...

For more than half a century, particle physicists have theorized the existence of a “glueball,” a particle made entirely of gluons. While the past few decades have produced some compelling candidates, ...

The optics of particle counters and the transportation of particles in tubing between a sample inlet have often been at the center of discussion concerning the accuracy of readings. The reliability of ...

Once in a very great while, an ephemeral particle called a kaon arises and then quickly decays away into three other obscure entities. Whether or not this happens in a particular way has very little ...