There are actually a few anomalies in the data, including asymmetrical behavior of top quarks. Together the data suggest a new particle, a new force or at the very least, new behavior among recognized particles and forces. This new particle could be a new boson, though not the elusive Higgs (the Higgs decays into heavier particles than this new thing does). One theory posted to the physics arXiv says it could be a new brand of Z boson. Another theory posits that it's a heavy version of a gluon, the particle that glues quarks together, reports Science News.