Time-delayed electrons from Higgs decays to right-handed neutrinos

John Mason (Western State Colorado University, 1 Western Way, Gunnison, CO, 81231, U.S.A.)

We consider the physics reach at the high luminosity LHC (HL-LHC) using the timing capability of a minimum ionizing particle (MIP) timing layer and the electromagnetic calorimeter in the CMS experiment for a simplified right-handed neutrino effective theory. In the simplified model, the lightest right-handed neutrinos are produced through Higgs decay with mean decay lengths of order O $$ \mathcal{O} $$ (0.1 m − 100 m) and then subsequently decay into final states that include electrons. We consider the effect of several different kinematic cuts for a timing based analysis of this model. We demonstrate that if timing information can be successfully incorporated into the event trigger, it is possible to probe the Higgs branching ratio to two right-handed neutrinos to the order O $$ \mathcal{O} $$ (10−5) for a range of different right-handed neutrino lifetimes.

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      "value": "We consider the physics reach at the high luminosity LHC (HL-LHC) using the timing capability of a minimum ionizing particle (MIP) timing layer and the electromagnetic calorimeter in the CMS experiment for a simplified right-handed neutrino effective theory. In the simplified model, the lightest right-handed neutrinos are produced through Higgs decay with mean decay lengths of order   <math> <mi>O</mi> </math>  $$ \\mathcal{O} $$ (0.1 m \u2212 100 m) and then subsequently decay into final states that include electrons. We consider the effect of several different kinematic cuts for a timing based analysis of this model. We demonstrate that if timing information can be successfully incorporated into the event trigger, it is possible to probe the Higgs branching ratio to two right-handed neutrinos to the order   <math> <mi>O</mi> </math>  $$ \\mathcal{O} $$ (10\u22125) for a range of different right-handed neutrino lifetimes."
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Published on:
13 December 2019
Publisher:
Springer
Published in:
Journal of High Energy Physics , Volume 2019 (2019)
Issue 7
Pages 1-19
DOI:
https://doi.org/10.1007/JHEP07(2019)089
arXiv:
1905.07772
Copyrights:
The Author(s)
Licence:
CC-BY-3.0

Fulltext files: