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.

Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., et al. (2019). Search for Dark Matter Particles Produced in Association with a Top Quark Pair at s=13  TeV. PHYSICAL REVIEW LETTERS, 122(1) [10.1103/PhysRevLett.122.011803].

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

Benaglia, A.;Beschi, A.;Brianza, L.;Brivio, F.;Ciriolo, V.;Dinardo, M.  E.;Fiorendi, S.;Ghezzi, A.;Govoni, P.;Malberti, M.;Massironi, A.;Moroni, L.;Paganoni, M.;Ragazzi, S.;Tabarelli de Fatis, T.;Zuolo, D.;Gerosa, R.;Lucchini, M.  T.;De Guio, F.;
2019

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.
Articolo in rivista - Articolo scientifico
Physics - LHC - CMS
English
2019
122
1
none
Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., et al. (2019). Search for Dark Matter Particles Produced in Association with a Top Quark Pair at s=13  TeV. PHYSICAL REVIEW LETTERS, 122(1) [10.1103/PhysRevLett.122.011803].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/214591
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