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 -quark pairs, , using proton-proton collision data collected by the ATLAS detector at the Large Hadron Collider at center-of-mass energy . This search focuses on the range , where the decay products are collimated; it is complementary to a previous search in the same final state targeting the range , where the decay products are well separated. A novel strategy for the identification of the decays is deployed to enhance the efficiency for topologies with small separation angles. The search is performed with of integrated luminosity collected in 2015 and 2016 and sets upper limits on the production cross section of , where the Higgs boson is produced in association with a boson.
3 More- Received 26 May 2020
- Accepted 30 September 2020
DOI:https://doi.org/10.1103/PhysRevD.102.112006
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© 2020 CERN, for the ATLAS Collaboration