Impact of the relatively light fourth family neutrino on the Higgs boson search
S. A. Cetin (Do\u{g}u\c{s} University, Department of Physics,, Istanbul, Turkey.), T. Cuhadar-Donszelmann (University of Sheffield,, Department of Physics, Astronomy, Sheffield, U. K.), M. Sahin (TOBB, University of Economics, Technology, Physics Division, Ankara, Turkey.),
TL;DR
A light fourth family neutrino could significantly alter Higgs boson search interpretations, especially for masses below 170 GeV, challenging previous assumptions based on the three-family Standard Model.
Contribution
This paper demonstrates how a relatively light fourth family neutrino impacts Higgs search results, providing new insights into Higgs phenomenology beyond the standard three-family model.
Findings
Light fourth family neutrino can suppress Higgs signals
Reinterpretation of Higgs search results is necessary
Implications for future Higgs boson experiments
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 (2m_(nu_(4))<m_(H)) could drastically change the interpretation of the search results for the Higgs boson, especially if m_(H)<170 GeV.
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