Speaker
Description
The axion particle discovery could answer the big CP problem as it is hypothetically predicted. Hence a study on the exotic decay of the Higgs boson to two Axion Like Particles (ALPs) [1], [2], which in turn decay to two photons, was carried out. This analysis covers the mass range of ALPs between 100 MeV and 60 GeV and ALPs-photon couplings C_aγγ of 10^{−5} to 1, a region that includes signatures with significantly displaced vertices and highly collinear photons, which present the challenges of this analysis. No significant deviation from the SM expectations has been found, excluding a large parameter space of models that could have explained the (g - 2)μ discrepancy.
Index Terms
Higgs, Axion, ALP, Photons, Anomalous Higgs Decays, HDBS
REFERENCES
[1] K. Schmieden, M. Schott, O. Vujinovic, P. Kramer, B. Nachman, and H. Imam. Search for axions in H →aa → 4photon decays with
the ATLAS experiment at the LHC. Technical report, CERN, Geneva, 2022.
[2] M. Schott. Search for short and long-lived axions in H → aa → 4γ decays with the ATLAS experiment at the LHC. Technical report,
CERN, Geneva, 2022.
| Abstract Category | Particle Physics |
|---|
