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

Session

Experiments

Jul 10, 2026, 3:20 PM

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

Conveners

Experiments

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

Experiments

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

14. Searches for High-Mass Resonances in the ZZ→4ℓ Final State with the ATLAS Experiment

Konstantinos Sioulas (National and Kapodistrian University of Athens (GR))

7/10/26, 3:20 PM

A search for heavy resonances decaying into a pair of Z bosons leading to the $\ell\ell\ell\ell$ final state is presented, using the Run3 data collected by the ATLAS detector at √s = 13.6 TeV. The results are interpreted separately for the ggF and VBF production modes, with events being classified into ggF-enriched and VBF-enriched categories. Reducible backgrounds from processes such as...

69. Search for exotic decays of the Higgs boson to a pair of new light bosons in VH, H→XX→4b with the CMS experiment

Artemis Taxeidi (National Technical Univ. of Athens (GR))

7/10/26, 3:40 PM

1

Many extensions of the Standard Model predict exotic Higgs boson decays into new light scalar or pseudo-scalar particles. This contribution presents a search for the decay H → XX → bbbb in the associated production mode (VH), using Run 3 proton-proton collision data collected with the CMS detector at the LHC. The analysis targets final states containing four bottom quarks and, for the first...

9. Enhancement of the ATLAS NSW DCS performance and implementation of DCS for experimental setups

Michaela Arampatzi (National Technical Univ. of Athens (GR))

7/10/26, 4:00 PM

During the second long shutdown of the LHC at CERN, the most important Phase-1 upgrade within the ATLAS experiment was the replacement of the two inner endcap stations of the Muon Spectrometer with the New Small Wheels (NSW), in preparation for the High-Luminosity period (HL-LHC). The NSW consists of two novel detector technologies, the MicroMesh Gaseous Structure (Micromegas/MMG) and the...

63. Logistics in ATLAS ITk Upgrade Project: A challenging task for a global collaboration of Institutes

Spyridon Kompogiannis (Aristotle University of Thessaloniki (GR))

7/10/26, 5:00 PM

The ATLAS ITk System is an all-silicon tracker being built for the Phase-II upgrade of the ATLAS experiment with a total detector surface of almost 180 m2. The ITk is being built by more than 1000 researchers from 113 institutes in 22 countries around the globe. The ITk parts, built in institutes and industry, require complex logistics to ensure timely availability at the different...

42. A Fast Analytical Multiphysics Model for Laser-Driven Particle Acceleration Toward Pair Production Studies

Dr Vasiliki Alexopoulou (National Technical Univ. of Athens (GR))

7/10/26, 5:20 PM

Laser-driven particle acceleration provides a promising route to accessing extreme field conditions relevant to high-energy physics and laboratory studies of electron–positron plasma formation.
However, exploring these regimes remains challenging, as existing modeling approaches are both computationally intensive and inherently fragmented: particle-in-cell (PIC), magnetohydrodynamic
(MHD),...

23. Probing the Pair Production of Exotic $X_{5/3}$ Quarks in a Vector-Like Doublet Scenario at Muon Collider

EDA ALICI (ZONGULDAK BULENT ECEVIT UNIVERSTY)

Vector-like quarks are one of the key extensions that address the origin of fermion masses and the hierarchy problem, which is one of the major shortcomings of the Standard Model. In this study, we investigate the pair production process of exotic $X_{5/3}$ quarks within a vector-like doublet scenario at a future $\sqrt{s}=6~\mathrm{TeV}$ muon collider. The signal process of interest is...