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arXiv · 1704.00881

Heavy Neutrino Search via the Higgs boson at the LHC

Arindam Das·Yu Gao·Teruki Kamon
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Abstract

In the inverse see-saw model the effective neutrino Yukawa couplings can be sizable due to a large mixing angle between the light $(ν)$and heavy neutrinos $(N)$. When the right handed neutrino $(N)$ can be lighter than the Standard Model (SM) Higgs boson $(h)$. It can be produced via the on-shell decay of the Higgs, $h\to Nν$ at a significant branching fraction at the LHC. In such a process $N$ mass can be reconstructed in its dominant $N\rightarrow W \ell$ decays. We perform an analysis on this channel and its relevant backgrounds, among which the $W+$jets background is the largest. Considering the existing mixing constraints from the Higgs and electroweak precision data, the best sensitivity of the heavy neutrino search is achieved for benchmark $N$ mass at 100 and 110 GeV for upcoming high luminosity LHC runs.

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Arindam Das, Yu Gao, Teruki Kamon. 2019-05-27. Heavy Neutrino Search via the Higgs boson at the LHC. https://doi.org/10.1140/epjc%2Fs10052-019-6937-7

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