Search For Dark Matter Produced İn Association With A Single Top Quark Or A Top Quark Pair İn Proton-Proton Collisions At p s = 13 Tev
Yükleniyor...
Tarih
2019
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
The CMS Collaboration
Erişim Hakkı
Özet
A search for dark matter produced in association with top quarks in protonproton collisions at a center-of-mass energy of 13TeV is presented. The data set used corresponds to an integrated luminosity of 35.9 fb?¹ recorded with the CMS detector at the LHC. Whereas previous searches for neutral scalar or pseudoscalar mediators considered dark matter production in association with a top quark pair only, this analysis also includes production modes with a single top quark. The results are derived from the combination of multiple selection categories that are de ned to target either the single top quark or the top quark pair signature. No signi cant deviations with respect to the standard model predictions are observed. The results are interpreted in the context of a simpli ed model in which a scalar or pseudoscalar mediator particle couples to a top quark and subsequently decays into dark matter particles. Scalar and pseudoscalar mediator particles with masses below 290 and 300 GeV, respectively, are excluded at 95% con dence level, assuming a dark matter particle mass of 1 GeV and mediator couplings to fermions and dark matter particles equal to unity.
Açıklama
Anahtar Kelimeler
Dark matter, Hadron-Hadron scattering (experiments), Top physics
Kaynak
WoS Q Değeri
Q1
Scopus Q Değeri
Q2
Cilt
Sayı
Künye
J. High Energ. Phys. (2019) 2019: 141.
