Search for associated production of dark matter with a Higgs boson decaying to b b ¯ or γγ at √s=13 TeV

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Asilar, Ece and Bergauer, Thomas and Md. Ali, Mohd. Adli (2018) Search for associated production of dark matter with a Higgs boson decaying to b b ¯ or γγ at √s=13 TeV. Journal of High Energy Physics, 2017 (10). ISSN 1029-8479

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Abstract

A search for dark matter is performed looking for events with large missing transverse momentum and a Higgs boson decaying either to a pair of bottom quarks or to a pair of photons. The data from proton-proton collisions at a center-of-mass energy of 13 TeV, collected in 2015 with the CMS detector at the LHC, correspond to an integrated luminosity of 2.3 fb−1 . Results are interpreted in the context of a Z0 -two-Higgs-doublet model, where the gauge symmetry of the standard model is extended by a U(1)Z0 group, with a new massive Z0 gauge boson, and the Higgs sector is extended with four additional Higgs bosons. In this model, a high-mass resonance Z0 decays into a pseudoscalar boson A and a light SM-like scalar Higgs boson, and the A decays to a pair of dark matter particles. No significant excesses are observed over the background prediction. Combining results from the two decay channels yields exclusion limits in the signal cross section in the mZ0- mA phase space. For example, the observed data exclude the Z0 mass range from 600 to 1860 GeV, for Z0 coupling strength gZ0 = 0.8, the coupling of A with dark matter particles gχ = 1, the ratio of the vacuum expectation values tan β = 1, and mA = 300 GeV. The results of this analysis are valid for any dark matter particle mass below 100 GeV.

Item Type:	Article (Journal)
Additional Information:	7861/63061
Uncontrolled Keywords:	Dark matter, Hadron-hadron scattering (experiments), Higgs physics, Beyond standard model, Supersymmetry
Subjects:	Q Science > Q Science (General) Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science Kulliyyah of Science > Department of Physics
Depositing User:	Dr Mohd Adli MD Ali
Date Deposited:	05 Nov 2018 14:40
Last Modified:	05 Nov 2018 14:40
URI:	http://irep.iium.edu.my/id/eprint/63061

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