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

Session

Astroparticle and rare event searches

9 Jul 2026, 15:00

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

Conveners

Astroparticle and rare event searches

• IOANNIS Gkialas (University of the Aegean (GR))

29. Latest results on the search for a diffuse astrophysical neutrino flux with KM3NeT/ARCA

Chrysovalantis Karagiannis (NCSR Demokritos)

09/07/2026, 15:00

KM3NeT/ARCA is a deep-sea neutrino detector that is currently under construction at a depth of roughly 3500 meters in the Mediterranean Sea, off the Sicilian coast, Italy. The detector is continuously collecting data while its instrumented volume keeps increasing. The main physics goals of KM3NeT/ARCA are the discovery of point sources of high-energy neutrinos and the characterization of the...

16. Machine Learning applications for the design of LEMMOND, a water Cherenkov Detector to measure low energy neutrino interaction cross sections

Ioannis Karakoulias

09/07/2026, 15:20

ESSnuSB is a future long base-line (LBL) neutrino oscillation experiment, based on the low energy neutrino super-beam which can be generated using the European Spallation Source (ESS) Linear proton accelerator.The experiment is designed to measure the CP violating phase angle with an accuracy of less than $8^{\circ}$. To achieve such a goal, the very precise knowledge of the neutrino...

24. New Physics in the Neutrino Fog Era of Dark Matter Direct Detection

Dr Dimitrios Papoulias (IFIC (CSIC/Valencia U.))

09/07/2026, 15:40

The observation of solar $^8$B neutrinos in ton-scale xenon dark matter detectors has marked the beginning of the \emph{neutrino fog} era, establishing these experiments as complementary probes of neutrino and dark matter physics. In this talk, I will discuss recent constraints on new physics obtained from coherent elastic neutrino--nucleus scattering (CE$\nu$NS) measurements in XENONnT,...

22. Sterile neutrino phenomenology

Prof. CHRISTOS KOKORELIS (American University of Iraq-Baghdad)

09/07/2026, 16:00

I review the status of sterile neutrino searches and discuss their appearance within D-brane string models. Finally, I present limits on their existence.

8. Detection of Gravitons by Excess of Photon Luminosities from Interstellar and Intergalactic Hydrogen

Prof. Georgios Savvidis (Nat. Cent. for Sci. Res. Demokritos (GR))

We are interested in finding out a workable method for an experimental detection of gravitons by investigating their interaction with hydrogen atoms that are widespread in large clouds throughout the vast interstellar space of a typical spiral galaxy and with the giant halos of pristine, primordial hydrogen gas that surrounded galaxies in the early universe at z = 5.5 - 13.4. The presence of...