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Search for decays of the Higgs boson into pair-produced pseudoscalar particles decaying into τ + τ − τ + τ − using p p collisions at s = 13 TeV with the ATLAS detector

New Journal of Physics IOP Publishing 28:6 (2026) 063801-063801

Abstract:

Abstract A search for a pair of low-mass pseudoscalars a that promptly decay into τ -leptons is presented using 140 fb − 1 of proton–proton collision data at 13 TeV centre-of-mass energy recorded with the ATLAS detector at the Large Hadron Collider. The result is used to place constraints on exotic decays of the Higgs boson into four τ -leptons, H → a a → τ + τ − τ + τ − . This search focuses on events with either one or two τ -leptons decaying into hadrons and neutrinos, and the remaining three or two τ -leptons decaying into either electron or muon and neutrinos. No significant excess is observed above the expected Standard Model background and upper limits at the 95% confidence level on B ( H → a a → τ + τ − τ + τ − ) are set ranging from 0.06 to 0.23, depending on the mass m a ranging from 15 to 60 GeV.
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Measurement of the cross-section for the production of a $W$ boson in association with $b$-jets in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

ArXiv 2605.31205 (2026)
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Search for pair-produced vector-like $T$-quarks decaying into $Ht$ final states in the lepton-plus-jets channel in $pp$ collisions at $\sqrt{s}$=13 TeV with the ATLAS detector

ArXiv 2605.28538 (2026)
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TCAD + Allpi$\text{x}^2$ Simulation study of MALTA2, a Depleted Monolithic Active Pixel Sensor for future tracking

ArXiv 2605.2386 (2026)

Authors:

L Li, P Behera, DV Berlea, D Bortoletto, C Buttar, T Chembakan, V Dao, G Dash, Y Enari, L Fasselt, S Haberl, T Inada, FK Isik, C Issever, X Li, Y Okazaki, H Pernegger, P Riedler, W Snoeys, CA Solans Sanchez, A Swoboda, I Turk Cakir, M van Rijnbach, A Vijay, S Worm
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Search for soft unclustered energy patterns containing muons in the final state in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector

ArXiv 2605.20015 (2026)
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