Now sing along with me... from that ol' folk song... "Where have all the neutrons gone..." ...perhaps into heavy fermions? ;-)
This from the comment section of the Knol page on CF... Consider "heavy fermion" superconductors The August 2009 issue of Scientific American, pg 66 at left margin, describes a 1979 discovery: "Heavy-fermion superconductors such as uranium platinum (UPt3) are remarkable by also having electrons that effectively have hundreds of times their usual mass." It might be interesting to find out more about the circumstances under which electrons can "effectively" act as if they have hundreds of times their usual mass. After all, muon-catalyzed fusion involves particles that only have 206 times the mass of an electron. An electon actually only needs to act as if it had about 50 times its usual mass to be able to catalyze fusion. Mark N. Iverson [email protected]

