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Search for non-resonant Higgs boson pair production in the 2b + 2ℓ + Emiss T fnal state in pp collisions at √s = 13 TeV with the ATLAS detector ATLAS Collaboration
Abstract
A search for non-resonant Higgs boson pair (HH) production is presented, in which one of the Higgs bosons decays to a b-quark pair (b ¯b) and the other decays to WW∗ , ZZ∗ , or τ +τ −, with in each case a fnal state with ℓ +ℓ −+ neutrinos (ℓ = e, µ). The analysis targets separately the gluon-gluon fusion and vector boson fusion production modes. Data recorded by the ATLAS detector in proton-proton collisions at a centre-of-mass energy of 13 TeV at the Large Hadron Collider, corresponding to an integrated luminosity of 140 fb−1 , are used in this analysis. Events are selected to have exactly two b-tagged jets and two leptons with opposite electric charge and missing transverse momentum in the fnal state. These events are classifed using multivariate analysis algorithms to separate the HH events from other Standard Model processes. No evidence of the signal is found. The observed (expected) upper limit on the cross-section for non-resonant Higgs boson pair production is determined to be 9.7 (16.2) times the Standard Model prediction at 95% confdence level. The Higgs boson self-interaction coupling parameter κλ and the quadrilinear coupling parameter κ2V are each separately constrained by this analysis to be within the ranges [−6.2, 13.3] and [−0.17, 2.4], respectively, at 95% confdence level, when all other parameters are fixed.
Item Metadata
Title |
Search for non-resonant Higgs boson pair production in the 2b + 2ℓ + Emiss T fnal state in pp collisions at √s = 13 TeV with the ATLAS detector
|
Creator | |
Publisher |
Springer Berlin Heidelberg
|
Date Issued |
2024-02-07
|
Description |
A search for non-resonant Higgs boson pair (HH) production is presented, in
which one of the Higgs bosons decays to a b-quark pair (b
¯b) and the other decays to WW∗
,
ZZ∗
, or τ
+τ
−, with in each case a fnal state with ℓ
+ℓ
−+ neutrinos (ℓ = e, µ). The analysis
targets separately the gluon-gluon fusion and vector boson fusion production modes. Data
recorded by the ATLAS detector in proton-proton collisions at a centre-of-mass energy of
13 TeV at the Large Hadron Collider, corresponding to an integrated luminosity of 140 fb−1
,
are used in this analysis. Events are selected to have exactly two b-tagged jets and two leptons
with opposite electric charge and missing transverse momentum in the fnal state. These
events are classifed using multivariate analysis algorithms to separate the HH events from
other Standard Model processes. No evidence of the signal is found. The observed (expected)
upper limit on the cross-section for non-resonant Higgs boson pair production is determined
to be 9.7 (16.2) times the Standard Model prediction at 95% confdence level. The Higgs
boson self-interaction coupling parameter κλ and the quadrilinear coupling parameter κ2V
are each separately constrained by this analysis to be within the ranges [−6.2, 13.3] and
[−0.17, 2.4], respectively, at 95% confdence level, when all other parameters are fixed.
|
Subject | |
Genre | |
Type | |
Language |
eng
|
Date Available |
2024-10-24
|
Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution 4.0 International (CC BY 4.0)
|
DOI |
10.14288/1.0447097
|
URI | |
Affiliation | |
Citation |
Journal of High Energy Physics. 2024 Feb 07;2024(2):37
|
Publisher DOI |
10.1007/JHEP02(2024)037
|
Peer Review Status |
Reviewed
|
Scholarly Level |
Faculty
|
Copyright Holder |
The Author(s)
|
Rights URI | |
Aggregated Source Repository |
DSpace
|
Item Media
Item Citations and Data
Rights
Attribution 4.0 International (CC BY 4.0)