![HEP2026: 42nd Conference on Recent Developments in High Energy Physics and Cosmology [NTUA] Jul 8 – 11, 2026](/event/1654737/logo-1929213524.png){kind=logo}
Conveners
Theory
- Fotis Farakos (Physics Division, National Technical University of Athens)
Theory
- Fotis Farakos (Physics Division, National Technical University of Athens)
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Alexandros Zarafonitis (Physics Division, National Technical University of Athens)10/07/2026, 12:00
We propose the first examples of scale-separated vacua with extended supersymmetry. They
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arise as circle compactifications of four-dimensional vacua of massive type IIA supergravity
with scale separation, upon introducing additional fluxes and sources. We provide both the
ten-dimensional solutions and the three-dimensional effective descriptions in terms of Kähler
potential and... -
Ioannis Gialamas (National Institute of Chemical Physics and Biophysics)10/07/2026, 12:20
In this talk, I will present recent BAO results from DESI suggesting that dark energy may be evolving, with low redshift supernova data playing an important role in this indication. I will briefly discuss equation of state parametrizations and focus on a simple quintessence model with a Higgs like potential. This approach suggests that the Universe may already be in, or could evolve into, an...
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Dimitrios Beis10/07/2026, 12:40
Rare exclusive Higgs decays H → Mγ, with M = ρ, ω, ϕ, J/ψ, Υ, provide a clean probe of Higgs–quark interactions and possible SMEFT effects. We study the dimension-six operators contributing to these channels and classify their impact into direct, indirect and dipole-contact contributions. Particular emphasis is placed on electroweak quark dipole operators, which can modify the branching ratios...
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Frederic Lassiaille10/07/2026, 15:00
We present recent developments of a corrected relativistic framework based on a structural re-examination of the spacetime–energy coupling in General Relativity. The approach replaces the standard static description of matter with a fully dynamical representation of energy, leading to additional first-order structural contributions in the Einsteinian formulation.
A recent technical advance...
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Athanasios Bakopoulos (University of Patras)
Explicit static, spherically symmetric black-hole solutions endowed with primary scalar hair arise within the shift-symmetric, parity-preserving subclass of beyond Horndeski theories. In addition to the mass, the solutions depend on a second free parameter identified with a conserved scalar charge arising from the Noether current of the shift symmetry. For small values of this charge, the...
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Prof. Dimitrios Giataganas (NCTS)
We investigate the dynamics of unstable null geodesics through the universal Penrose limit of axisymmetric black holes. Utilizing the Killing-Yano tensor, we show how the resulting plane wave geometry directly encodes the instabilities of photon rings, allowing quasinormal modes and Lyapunov exponents to be extracted from a single effective Hamiltonian. We then connect these geometric...
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