Posted: Dec 19, 2012 1:29 am
by lpetrich
CMS, ATLAS experiments report Higgs-like particle close to the 7 sigma level -- that's that putative Higgs particle that they had discovered.

12 matter particles suffice in nature reporting on Phys. Rev. Lett. 109, 241802 (2012): Impact of a Higgs Boson at a Mass of 126 GeV on the Standard Model with Three and Four Fermion Generations
The authors analyzed LHC and Tevatron data, and they found that a fourth generation of elementary fermions is excluded to within 5.3 standard deviations.