Muon-catalyzed fusion (μCF) is a type of cold nuclear fusion, which means that nuclear fusion can happen at low temperatures and under normal pressure. There need to be 3 particles: a muon, a positively charged triton and a positively charged deuteron. The muon, which has a greater mass (when its not moving) than an electron, drags the heavier triton and the deuteron to it, creating something called a muonic heavy hydrogen ion. This means that the particle is a hydrogen atom with more protons then electrons, that contains a muon, and that contains extra neutrons which make it heavier. This reaction can be done at room temperature or below, such as -270 degrees Celsius.