Now, a new study suggests how detecting a certain family of particles (known as a “5-plet”) using the Large Hadron Collider at CERN could, at the very least, prove that string theory is incomplete. This discrepancy has inspired decades of theoretical investigations into how these two theories could be united using various theoretical frameworks, including string theory. However, string theory is famously mathematically dense, and relies on nearly a dozen spacetime dimensions. The other problem is that the predicted behaviors of string theory only present themselves at immense energies—even more immense that what’s currently possible at the Large Hadron Collider at CERN. As its name suggests, this family contains a five-member particle package that is noticeably absent from string theory calculations, according to the authors.