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Expected Tracking Performance of the ATLAS Inner Tracker at the High-Luminosity LHC

ArXiv 2412.1509 (2024)
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Improved reconstruction of highly boosted $τ$-lepton pairs in the $ττ\rightarrow(μν_μν_τ)({hadrons}+ν_τ)$ decay channels with the ATLAS detector

ArXiv 2412.14937 (2024)
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Observation of $VVZ$ production at $\sqrt{s}=13$ TeV with the ATLAS detector

ArXiv 2412.15123 (2024)
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Search for Higgs boson decays into a pair of pseudoscalar particles in the $γγτ_{\text{had}}τ_{\text{had}}$ final state using $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

ArXiv 2412.14046 (2024)
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Search for a light CP-odd Higgs boson decaying into a pair of τ -leptons in proton-proton collisions at s = 13 TeV with the ATLAS detector

Journal of High Energy Physics Springer 2024:12 (2024) 126

Authors:

G Aad, E Aakvaag, B Abbott, S Abdelhameed, K Abeling, NJ Abicht, SH Abidi, M Aboelela, A Aboulhorma, H Abramowicz, H Abreu, Y Abulaiti, BS Acharya, A Ackermann, C Adam Bourdarios, L Adamczyk, SV Addepalli, MJ Addison, J Adelman, A Adiguzel, T Adye, AA Affolder, Y Afik, MN Agaras

Abstract:

This paper reports a search for a light CP-odd scalar resonance with a mass of 20 GeV to 90 GeV in 13 TeV proton-proton collision data with an integrated luminosity of 140 fb−1 collected with the ATLAS detector at the Large Hadron Collider. The analysis assumes the resonance is produced via gluon-gluon fusion and decays into a τ+τ− pair which subsequently decays into a fully leptonic μ+νμν¯τe−ν¯eντ or e+νeν¯τμ−ν¯μντ final state. No significant excess of events above the predicted Standard Model background is observed. The results are interpreted within a flavour-aligned two-Higgs-doublet model, and a model-independent cross-section interpretation is also given. Upper limits at 95% confidence level between 3.0 pb and 68 pb are set on the cross-section for producing a CP-odd Higgs boson that decays into a τ+τ− pair.
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