Search for the Production of Dark Matter in Association with Top-Quark Pairs in the Single-Lepton Final State in Proton-Proton Collisions at $\sqrt{s}$ = 8 TeV

Khachatryan, V.

doi:10.1007/JHEP06(2015)121

Title: Search for the Production of Dark Matter in Association with Top-Quark Pairs in the Single-Lepton Final State in Proton-Proton Collisions at $$\sqrt{s}$$ = 8 TeV

Journal Article · Wed Jun 17 00:00:00 EDT 2015 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/JHEP06(2015)121· OSTI ID:1212749

Khachatryan, V. ^[1]

Yerevan Physics Inst. (YerPhI) (Armenia). et al.

A search is presented for particle dark matter produced in association with a pair of top quarks in pp collisions at a centre-of-mass energy of s√=8 TeV. The data were collected with the CMS detector at the LHC and correspond to an integrated luminosity of 19.7 fb^-1. This search requires the presence of one lepton, multiple jets, and large missing transverse energy. No excess of events is found above the SM expectation, and upper limits are derived on the production cross section. Interpreting the findings in the context of a scalar contact interaction between fermionic dark matter particles and top quarks, lower limits on the interaction scale are set. These limits are also interpreted in terms of the dark matter-nucleon scattering cross sections for the spin-independent scalar operator and they complement direct searches for dark matter particles in the low mass region.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Organization:: CMS Collaboration

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1212749

Report Number(s):: FERMILAB-PUB-15-186-CMS; CERN-PH-EP-2015-087; CMS-B2G-14-004; arXiv eprint number arXiv:1504.03198; TRN: US1500636

Journal Information:: Journal of High Energy Physics (Online), Vol. 2015, Issue 6; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 19 works

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Search for Dark Matter Particles Produced in Association with a Top Quark Pair at $\sqrt{s} = 13 TeV$ Sirunyan, A. M.; Tumasyan, A.; Adam, W. Physical Review Letters, Vol. 122, Issue 1 https://doi.org/10.1103/physrevlett.122.011803	journal	January 2019
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