Combination of searches for invisible Higgs Boson decays with the ATLAS Experiment

Dark matter particles, if sufficiently light, may be produced in decays of the Higgs boson. This Letter presents a statistical combination of searches for H→invisible decays where H is produced according to the standard model via vector boson fusion, Z(ℓℓ)H, and W/Z(had)H, all performed with the ATL...

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Bibliographic Details
Main Author: Onofre, A. (author)
Other Authors: Castro, Nuno Filipe (author), ATLAS Collaboration (author)
Format: article
Language:eng
Published: 2019
Subjects:
Online Access:http://hdl.handle.net/1822/62646
Country:Portugal
Oai:oai:repositorium.sdum.uminho.pt:1822/62646
Description
Summary:Dark matter particles, if sufficiently light, may be produced in decays of the Higgs boson. This Letter presents a statistical combination of searches for H→invisible decays where H is produced according to the standard model via vector boson fusion, Z(ℓℓ)H, and W/Z(had)H, all performed with the ATLAS detector using 36.1  fb−1 of pp collisions at a center-of-mass energy of √s=13  TeV at the LHC. In combination with the results at √s=7 and 8 TeV, an exclusion limit on the H→invisible branching ratio of 0.26(0.17+0.07−0.05) at 95% confidence level is observed (expected).