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Search for dark matter in events with a hadronically decaying vector boson and missing transverse momentum in pp collisions at root s=13 TeV with the ATLAS detector
Univ Mohamed Premier & LPTPM, Fac Sci, Oujda, Morocco..
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0001-6945-1916
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0003-3867-0336
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-8015-7512
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Number of Authors: 29162018 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 10, article id 180Article in journal (Refereed) Published
Abstract [en]

A search for dark matter (DM) particles produced in association with a hadronically decaying vector boson is performed using pp collision data at a centre-of-mass energy of TeV corresponding to an integrated luminosity of 36.1 fb(-1), recorded by the ATLAS detector at the Large Hadron Collider. This analysis improves on previous searches for processes with hadronic decays of W and Z bosons in association with large missing transverse momentum (mono-W/Z searches) due to the larger dataset and further optimization of the event selection and signal region definitions. In addition to the mono-W/Z search, the as yet unexplored hypothesis of a new vector boson Z produced in association with dark matter is considered (mono-Z search). No significant excess over the Standard Model prediction is observed. The results of the mono-W/Z search are interpreted in terms of limits on invisible Higgs boson decays into dark matter particles, constraints on the parameter space of the simplified vector-mediator model and generic upper limits on the visible cross sections for W/Z+DM production. The results of the mono-Z search are shown in the framework of several simplified-model scenarios involving DM production in association with the Z boson.

Place, publisher, year, edition, pages
SPRINGER , 2018. no 10, article id 180
Keywords [en]
Beyond Standard Model, Dark matter, Hadron-Hadron scattering (experiments)
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-240284DOI: 10.1007/JHEP10(2018)180ISI: 000449259900009Scopus ID: 2-s2.0-85056098358OAI: oai:DiVA.org:kth-240284DiVA, id: diva2:1270763
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QC 20181214

Available from: 2018-12-14 Created: 2018-12-14 Last updated: 2018-12-14Bibliographically approved

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Kastanas, Konstatinos A.Jensen, BengtOhm, ChristianRipellino, GiuliaSidebo, P. EdvinStrandberg, Jonas

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