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Search for Higgs boson decays into two new low-mass spin-0 particles in the 4b channel with the ATLAS detector using pp collisions at √s=13 TeV

ATLAS Collaboration, ; (2020) Search for Higgs boson decays into two new low-mass spin-0 particles in the 4b channel with the ATLAS detector using pp collisions at √s=13 TeV. Physical Review D , 102 (11) , Article 112006. 10.1103/PhysRevD.102.112006. Green open access

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Abstract

This paper describes a search for beyond the Standard Model decays of the Higgs boson into a pair of new spin-0 particles subsequently decaying into b -quark pairs, H → a a → ( b ¯ b ) ( b ¯ b ) , using proton-proton collision data collected by the ATLAS detector at the Large Hadron Collider at center-of-mass energy √ s = 13     TeV . This search focuses on the range 15     GeV ≤ m a ≤ 30     GeV , where the decay products are collimated; it is complementary to a previous search in the same final state targeting the range 20     GeV ≤ m a ≤ 60     GeV , where the decay products are well separated. A novel strategy for the identification of the a → b ¯ b decays is deployed to enhance the efficiency for topologies with small separation angles. The search is performed with 36     fb − 1 of integrated luminosity collected in 2015 and 2016 and sets upper limits on the production cross section of H → a a → ( b ¯ b ) ( b ¯ b ) , where the Higgs boson is produced in association with a Z boson.

Type: Article
Title: Search for Higgs boson decays into two new low-mass spin-0 particles in the 4b channel with the ATLAS detector using pp collisions at √s=13 TeV
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevD.102.112006
Publisher version: https://doi.org/10.1103/PhysRevD.102.112006
Language: English
Additional information: Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/10117760
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