Search for dark matter produced in association with a Higgs boson decaying to γγ or τ + τ − at √s=13 TeV
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 collecte...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Springer Verlag
2018
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/70348/1/70348_Search%20for%20dark%20matter%20produced%20in%20association_article.pdf http://irep.iium.edu.my/70348/2/70348_Search%20for%20dark%20matter%20produced%20in%20association_scopus.pdf http://irep.iium.edu.my/70348/ https://link.springer.com/content/pdf/10.1007%2FJHEP09%282018%29046.pdf |
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| Summary: | 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. |
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