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

Abstract: A search is performed for dark matter particles produced in association with a top quark pair in proton-proton collisions at ?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.

 Fuente: Phys. Rev. Lett. 122, 011803

 Editorial: American Physical Society

 Fecha de publicación: 01/01/2019

 Nº de páginas: 19

 Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevLett.122.011803

 ISSN: 0031-9007,1079-7114

 Url de la publicación: https://doi.org/10.1103/PhysRevLett.122.011803