Invisible decays of the heavier Higgs boson in the minimal supersymmetric standard model

B. Ananthanarayan, Jayita Lahiri, and P. N. Pandita
Phys. Rev. D 91, 115025 – Published 29 June 2015

Abstract

We consider the possibility that the heavier CP-even Higgs boson (H0) in the minimal supersymmetric standard model (MSSM) decays invisibly into neutralinos in the light of the recent discovery of the 126 GeV resonance at the CERN Large Hadron Collider (LHC). For this purpose we consider the minimal supersymmetric standard model with universal, nonuniversal and arbitrary boundary conditions on the supersymmetry breaking gaugino mass parameters at the grand unified scale. Typically, scenarios with universal and nonuniversal gaugino masses do not allow invisible decays of the lightest Higgs boson (h0), which is identified with the 126 GeV resonance, into the lightest neutralinos in the MSSM. With arbitrary gaugino masses at the grand unified scale, such an invisible decay is possible. The second lightest Higgs boson can decay into various invisible final states for a considerable region of the MSSM parameter space with arbitrary gaugino masses as well as with the gaugino masses restricted by universal and nonuniversal boundary conditions at the grand unified scale. The possibility of the second lightest Higgs boson of the MSSM decaying into invisible channels is more likely for arbitrary gaugino masses at the grand unified scale. The heavier Higgs boson decay into lighter particles leads to the intriguing possibility that the entire Higgs boson spectrum of the MSSM may be visible at the LHC even if it decays invisibly, during the searches for an extended Higgs boson sector at the LHC. In such a scenario the nonobservation of the extended Higgs sector of the MSSM may carefully be used to rule out regions of the MSSM parameter space at the LHC.

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  • Received 2 April 2015

DOI:https://doi.org/10.1103/PhysRevD.91.115025

© 2015 American Physical Society

Authors & Affiliations

B. Ananthanarayan, Jayita Lahiri, and P. N. Pandita

  • Centre for High Energy Physics, Indian Institute of Science, Bangalore 560 012, India

See Also

Invisible decays of the lightest Higgs boson in supersymmetric models

B. Ananthanarayan, Jayita Lahiri, P. N. Pandita, and Monalisa Patra
Phys. Rev. D 87, 115021 (2013)

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Vol. 91, Iss. 11 — 1 June 2015

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