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

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URI: http://hdl.handle.net/10902/18488
ISSN: 0031-9007
ISSN: 1079-7114
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Autoría
Sirunyan, A. M.; Cabrillo Bartolomé, José IbanAutoridad Unican; Calderón Tazón, AliciaAutoridad Unican; Chazín Quero, Bárbara; Duarte Campderros, JorgeAutoridad Unican; Fernández García, MarcosAutoridad Unican; Fernández Manteca, Pedro JoséAutoridad Unican; García Alonso, Andrea; García Ferrero, Juan; Gómez Gramuglio, GervasioAutoridad Unican; López Virto, María Amparo; Marco de Lucas, JesúsAutoridad Unican; Martínez Rivero, Celso; Martínez Ruiz del Árbol, PabloAutoridad Unican; Matorras Weinig, FranciscoAutoridad Unican; Piedra Gómez, JonatanAutoridad Unican; Prieëls, CédricAutoridad Unican; Rodrigo Anoro, TeresaAutoridad Unican; Ruiz Jimeno, AlbertoAutoridad Unican; [et al.]
Fecha
2019-01
Derechos
Attribution 4.0 International
Publicado en
Phys. Rev. Lett. 122, 011803
Editorial
American Physical Society
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Resumen/Abstract
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.
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