HEP2026: 42nd Conference on Recent Developments in High Energy Physics and Cosmology [NTUA] Jul 8 – 11, 2026

Session

Experiments

9 Jul 2026, 11:30

Main Hall (Level 1) (National Technical University of Athens)

Conveners

Experiments

• Konstantinos Vellidis (National and Kapodistrian University of Athens (GR))

4. Search for heavy charged long-lived particles with the ATLAS detector using the full Run 2 dataset

Leonidas Fountas (National and Kapodistrian University of Athens (GR))

09/07/2026, 11:30

This presentation outlines a search for stable, massive, and charged long-lived particles (LLPs) using the full Run 2 dataset of proton-proton collisions at $\sqrt{s}=13$ TeV collected by the ATLAS experiment. These particles are predicted by various extensions of the Standard Model, such as Supersymmetry (SUSY), and are expected to travel significantly slower than the speed of light ($\beta <...

26. Study of VH(→bb̄/cc̄) production in the ATLAS experiment

Eleni Papadimitriou (Aristotle University of Thessaloniki (GR))

09/07/2026, 11:50

The associated production of a vector boson and a Higgs boson, VH(→bb̄/cc̄), provides a direct probe of the $κ_b$ and $κ_c$ couplings. The analysis targets the 0, 1, and 2 lepton channels, depending on the decay products of the vector boson, using proton-proton collision data collected by the ATLAS detector at √s = 13 Tev and 13.6 TeV. I will present updates to the analysis framework for Run...

36. Evidence of Higgs boson inclusive production at high transverse momentum decaying to a pair of $b$-quarks with the ATLAS detector

Evripidis Koutsioumpas (National Technical Univ. of Athens (GR))

09/07/2026, 12:10

Studies of the Higgs boson at high transverse momentum ($p_T$) are a valuable tool for the exploration of physics beyond the Standard Model. This work presents the first evidence of inclusive Higgs boson production at high $p_T$, decaying into $b\bar{b}$ quarks. The analysis is based on data from proton-proton collisions recorded by the ATLAS detector at CERN during Run 2 ($\sqrt{s} =...

27. Study of pp→HH→bbγγ production at \sqrt{s}=13TeV and \sqrt{s}=13.6TeV using ATLAS simulations

Eliana Kapsali (Aristotle University of Thessaloniki (GR))

09/07/2026, 12:30

Study of the $HH \to b\bar{b}\gamma\gamma$ decay channel in pp collisions at $\sqrt{s}=13TeV$ and $\sqrt{s}=13.6TeV$ using simulated events from the ATLAS experiment. A neural network classifier is trained on kinematic features to enhance signal-to-background discrimination. Background modeling and diphoton mass reconstruction assumptions, relevant to Higgs boson pair production searches, are...

28. From Design File to SCADA: Automating OPC UA Server Integration in the ATLAS DCS with quasar and Cacophony

Nikolaos Kanellos (National Technical Univ. of Athens (GR))

09/07/2026, 12:50

The ATLAS Detector Control System (DCS) is responsible for the safe and coherent operation of the ATLAS detector at CERN, supervising tens of thousands of hardware components spanning power supplies, cooling infrastructure, and front-end electronics to mention a few. The sheer scale and heterogeneity of the hardware demand a robust, maintainable middleware layer between the detector hardware...

1. Probing dark matter with novel signatures at the LHC

Ms Sofia Zioga (Aristotle University of Thessaloniki (GR))

09/07/2026, 13:10

The 2HDMa model is one of the main models used in the searches for dark matter at the LHC. However the benchmarks used have already been ruled out to a large extent by Run 2 searches. In this talk, we will show that new signatures emerge when we lift the restrictions imposed on the current benchmarks. We analyse the decay patterns of the charged Higgs boson in benchmarks with a Type-I Yukawa...