# Search for dark matter produced in association with a Higgs boson decaying to $\gamma$$\gamma$ or $\tau$+ $\tau$− at $\sqrt{s}$ = 13 TeV

ATLAS Collaboration
CMS Collaboration; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Dragicevic, M.; Erö, J.; Escalante Del Valle, A.; Flechl, M.; Frühwirth, R.; Ghete, V. M.; Hrubec, J.; Jeitler, M.; Krammer, N.; Krätschmer, I.; Liko, D.; Madlener, T.; Mikulec, I.; ... mehr

##### Abstract:
A search for dark matter particles is performed by looking for events with large transverse momentum imbalance and a recoiling Higgs boson decaying to either a pair of photons or a pair of τ leptons. The search is based on proton-proton collision data at a center-of-mass energy of 13 TeV collected at the CERN LHC in 2016 and corresponding to an integrated luminosity of 35.9 fb−1. No significant excess over the expected standard model background is observed. Upper limits at 95% confidence level are presented for the product of the production cross section and branching fraction in the context of two benchmark simplified models. For the Z′-two-Higgs-doublet model (where Z′ is a new massive boson mediator) with an intermediate heavy pseudoscalar particle of mass mA = 300 GeV and mDM = 100 GeV, the Z′ masses from 550 GeV to 1265 GeV are excluded. For a baryonic Z′ model, with mDM = 1 GeV, Z′ masses up to 615 GeV are excluded. Results are also presented for the spin-independent cross section for the dark matter-nucleon interaction as a function of the mass of the dark matter particle. This is the first search for dark matter particles produced in association with a Higgs boson decaying to two τ leptons.

 Zugehörige Institution(en) am KIT Institut für Experimentelle Teilchenphysik (ETP)Institut für Kernphysik (IKP)Institut für Prozessdatenverarbeitung und Elektronik (IPE) Publikationstyp Zeitschriftenaufsatz Publikationsmonat/-jahr 09.2018 Sprache Englisch Identifikator ISSN: 1029-8479 urn:nbn:de:swb:90-861401 KITopen-ID: 1000086140 HGF-Programm 51.03.03 (POF III, LK 01) Kosmische Strahlung Auger Erschienen in Journal of high energy physics Verlag Scuola Internazionale Superiore di Studi Avanzati (SISSA) Band 2018 Heft 9 Seiten Article: 46 Bemerkung zur Veröffentlichung Gefördert durch SCOAP3 Vorab online veröffentlicht am 10.09.2018 Schlagwörter Dark matter; Hadron-Hadron scattering (experiments) Nachgewiesen in DimensionsScopus
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