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Invisible decay of the Higgs boson in the context of a thermal and nonthermal relic in MSSM

Barman, Rahool Kumar and Belanger, Genevieve and Bhattacherjee, Biplob and Godbole, Rohini and Mendiratta, Gaurav and Sengupta, Dipan (2017) Invisible decay of the Higgs boson in the context of a thermal and nonthermal relic in MSSM. In: PHYSICAL REVIEW D, 95 (9).

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Official URL: http://doi.org/10.1103/PhysRevD.95.095018


We study the decay of 125 GeV Higgs boson to a pair of lightest neutralinos in the phenomenological minimal supersymmetric standard model in the context of collider searches and astrophysical experiments. We consider the parameter space for light neutralinos that can be probed via the invisible Higgs decays and Higgsino searches at the ILC. We consider the cases where the light neutralino is compatible with the observed relic density or where the thermal relic is overabundant, pointing to nonstandard cosmology. In the former case, when the neutralino properties give rise to underabundant relic density, the correct amount of relic abundance is assumed to be guaranteed by either additional dark matter particles or by nonthermal cosmology. We contrast these different cases. We assess what astrophysical measurements can be made, in addition to the measurements made at the ILC, which can provide a clue to the nature of the light neutralino. We find that a number of experiments, including Xenon-nT, PICO-250, and LZ, in conjunction with measurements made at the ILC on invisible Higgs width can pin down the nature of this neutralino, along with its cosmological implications. Additionally, we also point out potential LHC signatures that could be complementary in this region of parameter space.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Department/Centre: Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited: 09 Sep 2017 04:37
Last Modified: 09 Sep 2017 04:37
URI: http://eprints.iisc.ac.in/id/eprint/57769

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