Ex particle-physicist here. Extremely unlikely to be a new force of nature, given the energies that the Tevatron operates at we'd have seen some evidence for th

Ex particle-physicist here. Extremely unlikely to be a new force of nature, given the energies that the Tevatron operates at we'd have seen some evidence for this before - and nothing has ever suggested there might be something like this in addition to the fundamental 4. And whilst there might be wild speculation in the press as to what this might be, the research group(s) at Tevatron will certainly know. Given that one of the Tevatron's big hopes was to trump the LHC with a signature for the Higgs it could be something along these things, which would be fantastic. Although it's probably likely to be something more mundane.