New boson sparks call for 'Higgs factory' - physicsworld.com That article mentions a possible muon collider for making Higgs particles. Muons have the nice feature of having much less synchrotron-radiation loss, permitting a much smaller accelerator. However, muons have a problem. Their mean life is about 2.2 microseconds, and with time dilation at 100 Gev, it would become 2 milliseconds. That seems to offer very little margin of error. If a muon does not collide with another muon in a few microseconds of its proper time, it will decay. It may also be necessary to get both the negative and the positive muon from each muon pair production, unless it's feasible to make more than a million muons per second. That collider will produce Higgs particles by associated production: mu+ + mu- -> (Z) -> Z + H The energy threshold will be 216 GeV. Curiously, the LEP's maximum total energy was 209; the LEP barely missed discovering the Higgs particle.