Performance and efficiency of a transformer-based quark/gluon jet tagger in the ATLAS experiment
ArXiv 2512.03949 (2025)
Search for single production of vector-like quarks decaying into W ( ℓν ) b in pp collisions at s = 13 TeV with the ATLAS detector
Journal of High Energy Physics Springer 2025:12 (2025) 12
Abstract:
A search for single production of a vector-like quark Q, which could be either a singlet T, with charge 23, or a Y from a (T, B, Y) triplet, with charge −43, is performed using data from proton-proton collisions at a centre-of-mass energy of 13 TeV. The data correspond to the full integrated luminosity of 140 fb−1 recorded with the ATLAS detector during Run 2 of the Large Hadron Collider. The analysis targets Q → Wb decays where the W boson decays leptonically. The data are found to be consistent with the expected Standard Model background, so upper limits are set on the cross-section times branching ratio, and on the coupling of the Q to the Standard Model sector for these two benchmark models. Effects of interference with the Standard Model background are taken into account. For the singlet T, the 95% confidence level limit on the coupling strength κ ranges between 0.22 and 0.52 for masses from 1150 to 2300 GeV. For the (T, B, Y) triplet, the limits on κ vary from 0.14 to 0.46 for masses from 1150 to 2600 GeV.Measurement of the top-quark mass using decays with a $J/ψ$ meson at $\sqrt{s}=$13 TeV with the ATLAS detector
ArXiv 2511.23091 (2025)
Search for $H\rightarrow c\bar{c}$ and measurement of $H\rightarrow b\bar{b}$ in vector-boson fusion production with the ATLAS Detector
ArXiv 2511.21911 (2025)
Search for signatures of electroweakinos with photons, jets, and large missing transverse momentum in $\sqrt{s}=13$ TeV pp collisions with the ATLAS detector
ArXiv 2511.2124 (2025)