Search for short- and long-lived axion-like particles in H→aa→4γ decays with the ATLAS experiment at the LHC
Yükleniyor...
Tarih
2024
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer nature
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Presented is the search for anomalous Higgs boson decays into two axion-like particles (ALPs) using the full Run 2 data set of 140fb-1 of proton-proton collisions at a centre-of-mass energy of 13TeV 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 62GeV and ALP-photon couplings in the range 10-7TeV-1<Caγγ/Λ<1TeV-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 3×10-2, depending on the hypothesized ALP mass and ALP-photon coupling strength.
Açıklama
Anahtar Kelimeler
Kaynak
European physical journal c
WoS Q Değeri
Scopus Q Değeri
Q1
Cilt
84
Sayı
7
Künye
Null, N., Aad, G., Abbott, B., Abeling, K., Abicht, N., Abidi, S., ... & Balek, P. (2024). Search for short-and long-lived axion-like particles in $$ H\rightarrow aa\rightarrow 4\gamma $$ decays with the ATLAS experiment at the LHC. EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 84(7).
