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Search for short- and long-lived axion-like particles in H → aa → 4γ decays with the ATLAS experiment at the LHC ATLAS Collaboration
Abstract
Presented is the search for anomalous Higgs boson decays into two axion-like particles (ALPs) using the full Run 2 data set of 140 fb−1 of proton-proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS experiment. The ALPs are assumed to decay into two photons, providing sensitivity to recently proposed models that could explain the (g − 2)μ discrepancy. This analysis covers an ALP mass range from 100 to 62 GeV and ALP-photon couplings in the range 10−7 TeV−1 < Caγ γ / < 1 TeV−1, and therefore includes signatures with significantly displaced vertices and highly collinear photons. No significant excess of events above the Standard Model background is observed. Upper limits at 95% confidence level are placed on the branching ratio of the Higgs boson to two ALPs in the fourphoton final state, and are in the range of 10−5 to 3 × 10−2, depending on the hypothesized ALP mass and ALP-photon coupling strength.
Item Metadata
| Title |
Search for short- and long-lived axion-like particles in H → aa → 4γ decays with the ATLAS experiment at the LHC
|
| Creator | |
| Publisher |
Springer Berlin Heidelberg
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| Date Issued |
2024-07-26
|
| Description |
Presented is the search for anomalous Higgs
boson decays into two axion-like particles (ALPs) using the
full Run 2 data set of 140 fb−1 of proton-proton collisions at
a centre-of-mass energy of 13 TeV recorded by the ATLAS
experiment. The ALPs are assumed to decay into two photons, providing sensitivity to recently proposed models that
could explain the (g − 2)μ discrepancy. This analysis covers
an ALP mass range from 100 to 62 GeV and ALP-photon
couplings in the range 10−7 TeV−1 < Caγ γ / < 1 TeV−1,
and therefore includes signatures with significantly displaced
vertices and highly collinear photons. No significant excess
of events above the Standard Model background is observed.
Upper limits at 95% confidence level are placed on the
branching ratio of the Higgs boson to two ALPs in the fourphoton final state, and are in the range of 10−5 to 3 × 10−2,
depending on the hypothesized ALP mass and ALP-photon
coupling strength.
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| Genre | |
| Type | |
| Language |
eng
|
| Date Available |
2024-10-24
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| Provider |
Vancouver : University of British Columbia Library
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| Rights |
Attribution 4.0 International (CC BY 4.0)
|
| DOI |
10.14288/1.0447110
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| URI | |
| Affiliation | |
| Citation |
The European Physical Journal C. 2024 Jul 26;84(7):742
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| Publisher DOI |
10.1140/epjc/s10052-024-12979-0
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| 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)