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Type: Journal article
Title: Combination of searches for Higgs boson pairs in pp collisions at √s=13TeV with the ATLAS detector
Other Titles: Combination of searches for Higgs boson pairs in pp collisions at root s=13TeV with the ATLAS detector
Author: Aad, G.
Abbott, B.
Abbott, D.C.
Abed Abud, A.
Abeling, K.
Abhayasinghe, D.K.
Abidi, S.H.
AbouZeid, O.S.
Abraham, N.L.
Abramowicz, H.
Abreu, H.
Abulaiti, Y.
Acharya, B.S.
Achkar, B.
Adachi, S.
Adam, L.
Adam Bourdarios, C.
Adamczyk, L.
Adamek, L.
Adelman, J.
et al.
Citation: Physics Letters B: Nuclear Physics and Particle Physics, 2020; 800:1-23
Publisher: Elsevier
Issue Date: 2020
ISSN: 0370-2693
Statement of
G. Aad ... Paul Jackson ... Martin White ... Damir Duvnjak ... Jason Oliver, ... Andreas Petridis ... et al.
Abstract: This letter presents a combination of searches for Higgs boson pair production using up to 36.1fb−1of proton–proton collision data at a centre-of-mass energy √s=13 TeV recorded with the ATLAS detector at the LHC. The combination is performed using six analyses searching for Higgs boson pairs decaying into the b ̄bb ̄b, b ̄bW+W−, b ̄bτ+τ−, W+W−W+W−, b ̄bγγand W+W−γγfinal states. Results are presented for non-resonant and resonant Higgs boson pair production modes. No statistically significant excess in data above the Standard Model predictions is found. The combined observed (expected) limit at 95% confidence level on the non-resonant Higgs boson pair production cross-section is 6.9(10) times the predicted Standard Model cross-section. Limits are also set on the ratio (κλ) of the Higgs boson self-coupling to its Standard Model value. This ratio is constrained at 95% confidence level in observation (expectation) to −5.0 <κλ<12.0(−5.8 <κλ<12.0). In addition, limits are set on the production of narrow scalar resonances and spin-2 Kaluza–Klein Randall–Sundrum gravitons. Exclusion regions are also provided in the parameter space of the habemus Minimal Supersymmetric Standard Model and the Electroweak Singlet Model.
Rights: © 2019 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license ( Funded by SCOAP3
DOI: 10.1016/j.physletb.2019.135103
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