Abstract
The existence of a fourth fermion generation has mostly been considered as a source of enhanced Higgs signals with respect to the 3 family Standard Model predictions. However, a fourth Standard Model family neutrino could cause the opposite situation. It is shown that relatively light fourth family neutrino (2mν4<mH) could drastically change the interpretation of the search results for the Higgs boson, especially if mH<170 GeV.
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