Measuring neutrino dynamics in NMSSM with a right-handed sneutrino LSP at the ILC
Measuring neutrino dynamics in NMSSM with a right-handed sneutrino LSP at the ILC
We study the possibility of measuring neutrino Yukawa couplings in the Next-to-Minimal Supersymmetric Standard Model with right-handed neutrinos (NMSSMr) when the lightest Supersymmetric partner (a right-handed sneutrino) is the Dark Matter (DM) candidate, by exploiting a `dijet + dilepton + Missing Transverse Energy' (MET) signature. We show that, unlike the miminal realisation of Supersymmetry (SUSY), i.e., the MSSM, for which the DM candidate is a much heavier (fermionic) state (a neutralino), this non-minimal SUSY model offers one with a much lighter (bosonic) state (a sneutrino) as DM, which can be produced at future $e^+e^-$ colliders with energies up to about 500 GeV. The emerging signal, from chargino pair production and subsequent decay, is extremely pure so it allows for the possibility of extracting the Yukawa parameters of the (s)neutrino sector. These results should then motivate searches for light DM signals at such accelerators, where a DM candidate with mass at the Electro-Weak (EW) scale can then be accessed.
hep-ph
Liu, Yi
21eddce5-7985-43c0-992c-9d9965ba33ca
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Waltari, Harri
40b64912-03e3-4ed9-b3cd-b1951ab9b883
Liu, Yi
21eddce5-7985-43c0-992c-9d9965ba33ca
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Waltari, Harri
40b64912-03e3-4ed9-b3cd-b1951ab9b883
[Unknown type: UNSPECIFIED]
Abstract
We study the possibility of measuring neutrino Yukawa couplings in the Next-to-Minimal Supersymmetric Standard Model with right-handed neutrinos (NMSSMr) when the lightest Supersymmetric partner (a right-handed sneutrino) is the Dark Matter (DM) candidate, by exploiting a `dijet + dilepton + Missing Transverse Energy' (MET) signature. We show that, unlike the miminal realisation of Supersymmetry (SUSY), i.e., the MSSM, for which the DM candidate is a much heavier (fermionic) state (a neutralino), this non-minimal SUSY model offers one with a much lighter (bosonic) state (a sneutrino) as DM, which can be produced at future $e^+e^-$ colliders with energies up to about 500 GeV. The emerging signal, from chargino pair production and subsequent decay, is extremely pure so it allows for the possibility of extracting the Yukawa parameters of the (s)neutrino sector. These results should then motivate searches for light DM signals at such accelerators, where a DM candidate with mass at the Electro-Weak (EW) scale can then be accessed.
Text
2211.12536v1
- Author's Original
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e-pub ahead of print date: 14 September 2021
Additional Information:
Talk presented at the 41st International Conference on High Energy physics
Keywords:
hep-ph
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Local EPrints ID: 473038
URI: http://eprints.soton.ac.uk/id/eprint/473038
PURE UUID: 5d67a7b4-ee9c-48d7-8354-ac066f390e1a
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Date deposited: 09 Jan 2023 18:22
Last modified: 17 Mar 2024 02:58
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Author:
Yi Liu
Author:
Harri Waltari
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