Lepton number violation in heavy Higgs boson decays to sneutrinos

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Moretti , S , Shepherd-Themistocleous , C H & Waltari , H 2020 , ' Lepton number violation in heavy Higgs boson decays to sneutrinos ' , Physical Review D , vol. 101 , no. 1 , 015018 . https://doi.org/10.1103/PhysRevD.101.015018

Title: Lepton number violation in heavy Higgs boson decays to sneutrinos
Author: Moretti, S.; Shepherd-Themistocleous, C. H.; Waltari, H.
Contributor: University of Helsinki, Department of Physics
Date: 2020-01-28
Language: eng
Number of pages: 13
Belongs to series: Physical Review D
ISSN: 2470-0010
URI: http://hdl.handle.net/10138/312334
Abstract: We study the possibility of observing lepton number violation in the right-handed sneutrino sector of the next-to-minimal supersymmetric Standard Model extended with right-handed neutrinos. The scalar potential introduces a lepton number violating mass term for the right-handed sneutrinos, which generates a phase difference that results in oscillations between the sneutrino and antisneutrino. If we have light Higgsinos and right-handed sneutrinos, the sneutrino decay width is determined by the tiny Yukawa couplings, which allows the phase difference to accumulate before the sneutrino decays. We investigate the possibilities of producing sneutrino pairs resonantly through a heavy Higgs of such a model and the ability of seeing a lepton number violating signature emerging from sneutrinos at the Large Hadron Collider. We also discuss how a possible future signal of this type could be used to determine the neutrino Yukawa couplings.
Subject: NEUTRINO MASSES
OSCILLATIONS
SPHENO
MODEL
114 Physical sciences
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