• Open Access

Search for Higgs boson pair production in the two bottom quarks plus two photons final state in pp collisions at s=13TeV with the ATLAS detector

G. Aad et al. (ATLAS Collaboration)
Phys. Rev. D 106, 052001 – Published 6 September 2022

Abstract

Searches are performed for nonresonant and resonant di-Higgs boson production in the bb¯γγ final state. The dataset used corresponds to an integrated luminosity of 139fb1 of proton–proton collisions at a center-of-mass energy of 13 TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. No excess above the expected background is found and upper limits on the di-Higgs boson production cross sections are set. A 95% confidence-level upper limit of 4.2 times the cross section predicted by the Standard Model is set on ppHH nonresonant production, where the expected limit is 5.7 times the Standard Model predicted value. The expected constraints are obtained for a background hypothesis excluding ppHH production. The observed (expected) constraints on the Higgs boson trilinear coupling modifier κλ are determined to be [1.5,6.7] ([2.4,7.7]) at 95% confidence level, where the expected constraints on κλ are obtained excluding ppHH production from the background hypothesis. For resonant production of a new hypothetical scalar particle X (XHHbb¯γγ), limits on the cross section for ppXHH are presented in the narrow-width approximation as a function of mX in the range 251GeVmX1000GeV. The observed (expected) limits on the cross section for ppXHH range from 640 fb to 44 fb (391 fb to 46 fb) over the considered mass range.

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  • Received 23 December 2021
  • Accepted 1 August 2022

DOI:https://doi.org/10.1103/PhysRevD.106.052001

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. 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.

© 2022 CERN, for the ATLAS Collaboration

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Vol. 106, Iss. 5 — 1 September 2022

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