Search for invisible Higgs boson decays in vector boson fusion at √s=13 TeV with the ATLAS detector

Abraham, N L, Allbrooke, B M M, Asquith, L, Cerri, A, Jones, S D, De Santo, A, Salvatore, F, Shaw, K, Stevenson, T J, Suruliz, K, Sutton, M R, Tresoldi, F, Trovato, F, Vivarelli, I, Winkels, E, The ATLAS Collaboration, and others, (2019) Search for invisible Higgs boson decays in vector boson fusion at √s=13 TeV with the ATLAS detector. Physics Letters B, 793. pp. 499-519. ISSN 0370-2693

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We report a search for Higgs bosons that are produced via vector boson fusion and subsequently decay into invisible particles. The experimental signature is an energetic jet pair with invariant mass of O(1) TeVand O(100) GeV missing transverse momentum. The analysis uses 36.1fb−1of pp collision data at √s=13 TeV recorded by the ATLAS detector at the LHC. In the signal region the 2252observed events are consistent with the background estimation. Assuming a 125 GeV scalar particle with Standard Model cross sections, the upper limit on the branching fraction of the Higgs boson decay into invisible particles is 0.37at 95%confidence level where 0.28was expected. This limit is interpreted in Higgs portal models to set bounds on the wimp–nucleon scattering cross section. We also consider invisible decays of additional scalar bosons with masses up to 3 TeV for which the upper limits on the cross section times branching fraction are in the range of 0.3–1.7 pb.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics
Depositing User: Amelia Redman
Date Deposited: 16 Sep 2019 09:55
Last Modified: 16 Sep 2019 10:00

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