Fourth Family Neutrinos and the Higgs Boson

TL;DR

This paper assesses the LHC's potential to discover fourth family neutrinos and the Higgs boson simultaneously, highlighting the likelihood of early detection depending on neutrino masses and their nature.

Contribution

It provides the first detailed analysis of the LHC discovery prospects for fourth family neutrinos in conjunction with the Higgs boson, considering both Majorana and Dirac cases.

Findings

Early LHC operation could enable simultaneous discovery of Higgs and heavy neutrinos.

Discovery likelihood varies with neutrino mass and type (Majorana or Dirac).

Results suggest promising detection channels for future experiments.

Abstract

We evaluate the LHC discovery potential for the fourth family Standard Model neutrinos in the process $pp\to Z/h\to\nu_{4}{\bar{\nu}_{4}}\to W\mu W\mu$. We show that, depending on their masses, the simultaneous discovery of both the Higgs boson and the heavy neutrinos is probable at early stages of LHC operation. Results are presented for both Majorana and Dirac type fourth family neutrinos.