Search for Higgs boson decays into pairs of light (pseudo)scalar particles in the γγ <i>jj</i> final state in <i>pp</i> collisions at √s=13 TeV with the ATLAS detector



Aaboud, M, Aad, G, Abbott, B, Abdinov, O, Abeloos, B, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H, Abreu, H
et al (show 2845 more authors) (2018) Search for Higgs boson decays into pairs of light (pseudo)scalar particles in the γγ <i>jj</i> final state in <i>pp</i> collisions at √s=13 TeV with the ATLAS detector. PHYSICS LETTERS B, 782. pp. 750-767.

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Abstract

This Letter presents a search for exotic decays of the Higgs boson to a pair of new (pseudo)scalar particles, $H\to aa$, where the $a$ particle has a mass in the range 20-60 GeV, and where one of the $a$ bosons decays into a pair of photons and the other to a pair of gluons. The search is performed in event samples enhanced in vector-boson fusion Higgs boson production by requiring two jets with large invariant mass in addition to the Higgs boson candidate decay products. The analysis is based on the full dataset of $pp$ collisions at $\sqrt{s}= 13$ TeV recorded in 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider, corresponding to an integrated luminosity of 36.7 fb$^{-1}$. The data are in agreement with the Standard Model predictions and an upper limit at the 95% confidence level is placed on the production cross section times the branching ratio for the decay $H\to aa\to \gamma\gamma gg$. This limit ranges from 3.1 pb to 9.0 pb depending on the mass of the $a$ boson.

Item Type: Article
Additional Information: 30 pages in total, author list starting page 14, 2 figures, 6 tables, published in Phys. Lett. B. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2017-09/
Uncontrolled Keywords: hep-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 02 Jul 2018 08:27
Last Modified: 16 Oct 2023 20:56
DOI: 10.1016/j.physletb.2018.06.011
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3023261