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Search for Dark Matter Particles Produced in Association with a Top Quark Pair at root s=13 TeV

Author
Sirunyan A.M. Yerevan Physics Institute, Armenia
Finger Miroslav, prof. Ing. DrSc. Faculty of Mathematics and Physics, Charles University in Prague
Finger Michael, M.Sc. CSc. Faculty of Mathematics and Physics, Charles University in Prague, JINR Dubna
et al.  different institutions

Year
2019

Scientific journal
PHYSICAL REVIEW LETTERS 122 (1) 011803

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Abstract
A search is performed for dark matter particles produced in association with a top quark pair in proton-proton collisions at root s = 13 TeV. The data correspond to an integrated luminosity of 35.9 fb(-1) recorded by the CMS detector at the LHC. No significant excess over the standard model expectation is observed. The results are interpreted using simplified models of dark matter production via spin-0 mediators that couple to dark matter particles and to standard model quarks, providing constraints on the coupling strength between the mediator and the quarks. These are the most stringent collider limits to date for scalar mediators, and the most stringent for pseudoscalar mediators at low masses.

Cite article as:
A. Sirunyan, M. Finger, M. Finger, . et al., "Search for Dark Matter Particles Produced in Association with a Top Quark Pair at root s=13 TeV ", PHYSICAL REVIEW LETTERS 122 (1) 011803 (2019)