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

Aad, Georges; Abbott, Braden Keim; Abbott, Dale; Abed Abud, Adam; Abeling, Kira; Abhayasinghe, Deshan Kavishka; Abidi, Haider; Abramowicz, Halina; Abreu, Henso; Abulaiti, Yiming

doi:10.1103/PhysRevD.106.052001

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

ATLAS

Collaboration

Dec 22, 2021

53 pages

Published in:

Phys.Rev.D 106 (2022) 5, 052001

Published: Sep 1, 2022

e-Print:

2112.11876 [hep-ex]

DOI:

10.1103/PhysRevD.106.052001 (publication)

PDG: Other Mass Limits

Report number:

CERN-EP-2021-180

Experiments:

CERN-LHC-ATLAS

View in:

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Citations per year

Abstract: (APS)

Searches are performed for nonresonant and resonant di-Higgs boson production in the

b \bar{b} γ γ

final state. The dataset used corresponds to an integrated luminosity of

139 {fb}^{- 1}

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

p p \to H H

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

p p \to H H

production. The observed (expected) constraints on the Higgs boson trilinear coupling modifier

κ_{λ}

are determined to be

[- 1.5, 6.7]

([- 2.4, 7.7])

at 95% confidence level, where the expected constraints on

κ_{λ}

are obtained excluding

p p \to H H

production from the background hypothesis. For resonant production of a new hypothetical scalar particle

X

(

X \to H H \to b \bar{b} γ γ

), limits on the cross section for

p p \to X \to H H

are presented in the narrow-width approximation as a function of

m_{X}

in the range

251 GeV \leq m_{X} \leq 1000 GeV

. The observed (expected) limits on the cross section for

p p \to X \to H H

range from 640 fb to 44 fb (391 fb to 46 fb) over the considered mass range.

Note:

53 pages in total, author list starting page 37, 15 figures, 8 tables, published in PRD. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HDBS-2018-34

p p: scattering
p p: colliding beams
Higgs particle: pair production
resonance: production
Higgs particle: decay modes
Higgs particle: hadronic decay
bottom: pair production
bottom: 2
Higgs particle: radiative decay
final state: two-photon

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