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      Invisible Higgs Decay in a Supersymmetric Inverse Seesaw Model with Light Sneutrino Dark Matter

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          Abstract

          Within the framework of a constrained Minimal Supersymmetric Standard Model (cMSSM) augmented by an MSSM singlet-pair sector to account for the non-zero neutrino masses by inverse seesaw mechanism, the lightest supersymmetric particle (LSP) can be a mixed sneutrino with mass as small as 50 GeV, satisfying all existing constraints, thus qualifying as a light dark matter candidate. We study the possibility of the lightest neutral Higgs boson in this model decaying invisibly into a pair of sneutrino LSPs, thereby giving rise to novel missing energy signatures at the LHC. We perform a two-parameter global analysis of the LHC Higgs data available till date to determine the optimal invisible Higgs branching fraction in this scenario, and obtain a 2σ(1σ) upper limit of 0.23 (0.12). A detailed cut-based analysis is carried out thereafter, demonstrating the viability of our proposed signal vis-a-vis backgrounds at the LHC.

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          Neutrino masses in SU(2) ⊗ U(1) theories

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            Mechanism for understanding small neutrino mass in superstring theories

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              Light scalar WIMP through the Higgs portal and CoGeNT

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                Author and article information

                Journal
                10 June 2013
                2013-11-01
                Article
                10.1007/JHEP10(2013)221
                1306.2143
                12cbf9ae-a376-47fc-9d82-810d9640f082

                http://arxiv.org/licenses/nonexclusive-distrib/1.0/

                History
                Custom metadata
                29 pages, 10 figures and 7 tables. Text and references added, some numbers changed slightly due to a small error in coding. To appear in JHEP
                hep-ph hep-ex

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