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

Session

Experiments

Jul 8, 2026, 11:30 AM

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

Conveners

Experiments

• Dimitris Fassouliotis (National and Kapodistrian University of Athens (GR))

5. Electroweak Physics with Multiboson Production at the LHC: Past, Present, and Future

Iro Koletsou (Centre National de la Recherche Scientifique (FR))

7/8/26, 11:30 AM

Multiboson production provides a powerful framework to probe the electroweak sector of the Standard Model, allowing direct access to triple and quartic gauge couplings. During Run 2 of the LHC, major experimental milestones were achieved, with the observation and measurement of electroweak diboson and triboson processes, marking the first experimental sensitivity to quartic gauge couplings at...

3. Operational Experience and Performance of the ATLAS New Small Wheels in Run 3

Stergios Tsigaridas (TRIUMF (CA))

7/8/26, 11:50 AM

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). Consisting of two novel detector technologies, the small-strip Thin Gap Chambers (sTGC) and the resistive strips Micromegas (MM), the NSW is targeting the rejection of...

21. CMS Tracking for the HL-LHC: A Heterogeneous Baseline with Extended Physics Reach

Manos Vourliotis (Univ. of California San Diego (US))

7/8/26, 12:10 PM

The unprecedented computational challenges of the High-Luminosity Large Hadron Collider, driven by the large number of simultaneous proton-proton collisions per bunch crossing, demand a fundamental change in reconstruction strategy. To address this, innovative algorithms are proposed for track seeding, building and fitting in Phase-2 CMS. For seeding, the Patatrack and Line Segment Tracking...

20. Next-Generation MDT DCS: Power Supply System Developments for the Phase-2 Upgrade

Ioannis Drivas-Koulouris (National Technical Univ. of Athens (GR))

7/8/26, 12:30 PM

The background radiation levels expected at the High-Luminosity LHC (HL-LHC) will significantly exceed those for which the ATLAS Muon Spectrometer was originally designed. To meet this challenge, the Monitored Drift Tube (MDT) chambers in the barrel inner small sectors will be replaced by new small-diameter MDT (sMDT) chambers. This upgrade also enables the installation of a new triple-layer...

13. Search for Higgs boson decay to a charm quark-antiquark pair via ttH production

Nikolaos Plastiras (National and Kapodistrian University of Athens (GR))

7/8/26, 12:50 PM

The measurement of the Higgs boson coupling to second-generation quarks is a critical test of the Standard Model Yukawa sector. This talk presents an updated search for the Higgs boson produced in association with a top quark-antiquark pair (ttH), where the Higgs boson decays into a charm quark-antiquark pair (H --> cc), using the CMS detector at the Large Hadron Collider. Building upon the...

33. Measurement of top quark mass in boosted ttbar - fully hadronic at 13.6TeV.

Eirini Siamarkou (National Technical Univ. of Athens (GR))

This analysis targets a measurement of the top quark mass at sqrt(s) = 13.6TeV, using Run 3 (2024) data.
The top quark is the heaviest fermion and plays an important role in the Standard Model. Its Yukawa coupling is related to the Higgs boson and to the vacuum expectation of the Higgs field. Furthermore the top quark mass contribute to the corrections for the W boson mass.
We present the...