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Title

Search for dark matter in events with a hadronically decaying vector boson and missing transverse momentum in pp collisions at √s = 13 TeV with the ATLAS detector

CollaborationWith : Akilli, Ece / Amrouche, Cherifa Sabrina / Ancu, Lucian Stefan / Benoit, Mathieu / Calace, Noemi / Clark, Allan Geoffrey / Della Volpe, Domenico / Di Bello, Francesco / Dubreuil, Arnaud / Fawcett, William / Ferrere, Didier / Gadatsch, Stefan / Golling, Tobias / Gonzalez Sevilla, Sergio / Iacobucci, Giuseppe / Iizawa, Tomoya / Jansky, Roland / Khoo, Teng Jian / Kiehn, Moritz / Lanfermann, Marie Christine / Lionti, Anthony Eric / March Ruiz, Luis / Mermod, Philippe / Nessi, Marzio / Paolozzi, Lorenzo / Poggi, Riccardo / Salamani, Dalila / Schramm, Steven / Sfyrla, Anna / Sultan, D M S / Valente, Marco / Vicente Barreto Pinto, Mateus / Wu, Xin / Zaffaroni, Ettore
Published in Journal of High Energy Physics. 2018, vol. 1810, p. 180
Collection Open Access - SCOAP3
Abstract 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 √s = 13 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.
Keywords Beyond Standard ModelDark matterHadron-Hadron scattering (experiments)
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arXiv: 1807.11471
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ATLAS COLLABORATION. Search for dark matter in events with a hadronically decaying vector boson and missing transverse momentum in pp collisions at √s = 13 TeV with the ATLAS detector. In: Journal of High Energy Physics, 2018, vol. 1810, p. 180. https://archive-ouverte.unige.ch/unige:110362

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Deposited on : 2018-11-05

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