Matter-antimatter difference found in neutrino oscillations

One of the great scientific puzzles of our time is why we live in a universe full of matter rather than antimatter. Wherever we look, we observe that matter dominates over antimatter, yet we believe that matter and antimatter were created in equal amounts soon after the Big Bang. To reconcile these two facts there must be some difference in the way matter and antimatter behave. Experiments using accelerators that create heavy particles containing quarks show some degree of difference with their antiparticle counterparts - an asymmetry known as Charge-Parity, or CP, violation. However, despite knowing there is a difference between heavy particles and their antiparticles, the overall effect of these differences is too small to explain the imbalance between matter and antimatter that arose in the early universe. Another alternative is that very light neutral particles, called neutrinos behave differently to their antimatter counterparts, antineutrinos. Neutrinos are particles without charge and with very small mass that interact very weakly with normal matter.