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Search for dark matter produced in association with a Higgs boson decaying to γγ or τ + τ − at √s=13 TeV

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2018) Search for dark matter produced in association with a Higgs boson decaying to γγ or τ + τ − at √s=13 TeV. Journal of High Energy Physics, 2018 (9). pp. 1-48. ISSN 11266708 E-ISSN 1029-8479

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A search for dark matter particles is performed by looking for events with large transverse momentum imbalance and a recoiling Higgs boson decaying to either a pair of photons or a pair of τ leptons. The search is based on proton-proton collision data at a center-of-mass energy of 13 TeV collected at the CERN LHC in 2016 and corresponding to an integrated luminosity of 35.9 fb−1 . No significant excess over the expected standard model background is observed. Upper limits at 95% confidence level are presented for the product of the production cross section and branching fraction in the context of two benchmark simplified models. For the Z0 -two-Higgs-doublet model (where Z0 is a new massive boson mediator) with an intermediate heavy pseudoscalar particle of mass mA = 300 GeV and mDM = 100 GeV, the Z0 masses from 550 GeV to 1265 GeV are excluded. For a baryonic Z0 model, with mDM = 1 GeV, Z0 masses up to 615 GeV are excluded. Results are also presented for the spin-independent cross section for the dark matter-nucleon interaction as a function of the mass of the dark matter particle. This is the first search for dark matter particles produced in association with a Higgs boson decaying to two τ leptons.

Item Type: Article (Journal)
Additional Information: 7861/70348
Uncontrolled Keywords: Dark matter, Hadron-hadron scattering (experiments)
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: 30 Jan 2019 11:35
Last Modified: 30 Jan 2019 11:35
URI: http://irep.iium.edu.my/id/eprint/70348

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