Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/11707
Title: Search for Short- and Long-Lived Axion-Like Particles in H → Aa → 4γ Decays With the Atlas Experiment at the Lhc
Authors: Aad, G.
Abbott, B.
Abeling, K.
Abicht, N. J.
Abidi, S. H.
Aboulhorma, A.
Zwalinski, L.
Keywords: [No Keyword Available]
Publisher: Springer
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)(mu) discrepancy. This analysis covers an ALP mass range from 100 to 62 GeV and ALP-photon couplings in the range 10(-7) TeV-1 < C-a gamma gamma/Lambda < 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 four-photon final state, and are in the range of 10(-5) to 3x10(-2), depending on the hypothesized ALP mass and ALP-photon coupling strength.
Description: Teixeira-Dias, Pedro/0000-0001-9977-3836
URI: https://doi.org/10.1140/epjc/s10052-024-12979-0
ISSN: 1434-6044
1434-6052
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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