Search for Higgs boson pair production in the $WW^{(*)}WW^{(*)}$ decay channel using ATLAS data recorded at $\sqrt{s}=13$ TeV

Aaboud, Morad; Aad, Georges; Abbott, Brad; Abdinov, Ovsat; Abeloos, Baptiste; Abhayasinghe, Deshan Kavishka; Abidi, Syed Haider; Abouzeid, Ossama; Abraham, Nicola; Abramowicz, Halina

doi:10.1007/JHEP05(2019)124

Search for Higgs boson pair production in the $WW^{()}WW^{()}$ decay channel using ATLAS data recorded at $\sqrt{s}=13$ TeV

ATLAS

Collaboration

Nov 27, 2018

39 pages

Published in:

JHEP 05 (2019) 124

Published: May 21, 2019

e-Print:

1811.11028 [hep-ex]

DOI:

10.1007/JHEP05(2019)124 (publication)

PDG: Other Mass Limits

Report number:

CERN-EP-2018-227

Experiments:

CERN-LHC-ATLAS

View in:

reference search91 citations

Citations per year

Abstract: (Springer)

A search for a pair of neutral, scalar bosons with each decaying into two W bosons is presented using 36.1 fb

^{−1}

of proton-proton collision data at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider. This search uses three production models: non-resonant and resonant Higgs boson pair production and resonant production of a pair of heavy scalar particles. Three final states, classified by the number of leptons, are analysed: two same-sign leptons, three leptons, and four leptons. No significant excess over the expected Standard Model backgrounds is observed. An observed (expected) 95% confidence-level upper limit of 160 (120) times the Standard Model prediction of non-resonant Higgs boson pair production cross-section is set from a combined analysis of the three final states. Upper limits are set on the production cross-section times branching ratio of a heavy scalar X decaying into a Higgs boson pair in the mass range of 260 GeV ≤ m

_{X}

≤ 500 GeV and the observed (expected) limits range from 9.3 (10) pb to 2.8 (2.6) pb. Upper limits are set on the production cross-section times branching ratio of a heavy scalar X decaying into a pair of heavy scalars S for mass ranges of 280 GeV ≤ m

_{X}

≤ 340 GeV and 135 GeV ≤ m

_{S}

≤ 165 GeV and the observed (expected) limits range from 2.5 (2.5) pb to 0.16 (0.17) pb.

Note:

39 pages in total, author list starting page 23, 4 figures, 12 tables, published in JHEP, JHEP 05 (2019) 124. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2016-24/ •
Submitted to JHEP

Hadron-Hadron scattering (experiments)
p p: colliding beams
Higgs particle: pair production
resonance: production
boson: scalar
scalar particle: heavy
model: production
p p: scattering
W: multiple production
lepton: multiplicity

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