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Tim Cohen (CERN)25/02/2026, 09:00
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Mariangela Lisanti (Princeton University)25/02/2026, 09:10
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Belen Gavela Legazpi (Universidad Autonoma de Madrid and IFT-UAM/CSIC)25/02/2026, 09:40
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Laura Lopez Honorez (Universite Libre de Bruxelles)25/02/2026, 10:10
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Dhruv Pathak (King's College London)25/02/2026, 11:10
You can create a black hole bomb using a Kerr black hole by putting mirrors around it. This can happen because of a phenomenon called superradiance using which an incident wave can get reflected back with larger energy. The mirror then reflects it back and you can keep on extracting energy until the limit is reached. For a massive field, the mass itself acts as a natural barrier. Ultra light...
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Mariachiara Ingicco (Università degli Studi di Padova, INFN Padova)25/02/2026, 11:20
We study the transport of self-interacting millicharged particles (MCPs) coupled to a massless dark photon in core-collapse supernovae (SNe), focusing on masses above the MeV scale. In this regime, strong self-couplings drive the formation of a relativistic fluid rather than a free-streaming gas. We extend the hydrodynamic framework developed for light MCPs to heavier masses, revisiting...
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Fuensanta Viches Bravo (Universidad de Granada)25/02/2026, 11:30
The axion is one of the most compelling candidates for physics beyond the Standard Model, as it simultaneously provides a solution to the strong CP problem and a viable dark matter candidate. In post-inflationary scenarios, the minimal QCD axion model leads to strong constraints on the axion mass from the dark matter relic abundance. Specific quantization relations hold for the axion-gauge...
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Lucy Elisabeth Komisel (Max Planck Institute for Physics & LMU Munich)25/02/2026, 11:40
The topological susceptibility of the QCD vacuum provides an understanding of θ-vacua as vacua of a Chern-Simons gauge theory. In this way, it gives an immediate proof of the physicality of the boundary θ-term. This makes the essence of the strong-CP puzzle very transparent and offers a solution in form of the gauge axion, which has exact quality. This axion represents an intrinsic part of the...
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Mr Andrii Dashko (University of Granada)25/02/2026, 11:50
In this work, we study the renormalization-group evolution of parameters in the three-dimensional effective field theory (3D EFT) that describes the thermally driven electroweak phase transition of the Higgs field. We focus on the first-order case, triggered by beyond the Standard Model physics.
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We compute the two-loop running of the 3D EFT couplings, including the effect of the leading... -
Maria Cristina Fiore (University of Granada)25/02/2026, 12:00
We study the high-temperature behavior of the electroweak sector of the Standard Model Effective Field Theory (SMEFT), including dimension-six operators, by performing dimensional reduction up to $\mathcal{O}(g^4)$ in the gauge couplings. Our derivation accounts for one-loop corrections to kinetic terms and scalar quartic couplings, as well as two-loop contributions to thermal mass parameters....
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Chiara Giuliano (Universidad de Granada)25/02/2026, 12:10
We show that, contrary to common expectations, the observed charged leptons can have a substantial mixing with new heavier fermions, at the level of 20$\%$.
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This can happen, in the language of effective theories, when the effect of mixing with heavier fermions vanishes at tree level in operators of mass-dimension 6 (or it is suppressed by the small charged lepton masses), a cancellation that... -
Louise Carvalho (CERN)25/02/2026, 14:00
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Felix Yu (Johannes Gutenberg University Mainz)25/02/2026, 15:30
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Seyda Ipek (Carleton University)25/02/2026, 16:00
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Dr Diego Blas (ICREA/IFAE)25/02/2026, 16:30
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Jorinde van de Vis (CERN)26/02/2026, 09:00
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Felix Kahlhoefer (Karlsruhe Institute of Technology)26/02/2026, 09:30
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Diego Blas (ICREA/IFAE), Enrico Nardi (NICPB, Tallinn (EE) & INFN-LNF (IT)), Laura Lopez (Universite Libre de Bruxelles), Seyda Ipek (Carleton University (CA -US)), Venus Keus (Dublin Institute for Advanced Studies (DIAS))26/02/2026, 10:30
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Alejandra Castro (University of Cambridge)26/02/2026, 12:00
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Judith Hillier (University of Oxford)26/02/2026, 14:00
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Lucine Tabatt (Humboldt Universität zu Berlin)26/02/2026, 15:30
The measurement of the Higgs self-coupling is considered the next milestone
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in the study of the Higgs boson properties. At future $e^+e^-$ facilities below
the double Higgs production threshold, this is extracted from the $Zh$
production cross-section, which is sensitive to the trilinear coupling at the
one-loop level. At the same perturbative order, potential effects beyond the
Standard... -
Ms Swagata Biswas (National Institute of Technology Durgapur)26/02/2026, 15:40
The governing interaction in the subatomic world is the strong interaction,
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and it is explained by Quantum Chromodynamics (QCD), which is the final
symmetry of the Standard Model (SM). Physics beyond the SM is required to
explain numerous unsolved empirical and theoretical problems in high energy
physics. Lepton Flavour Violation (LFV) is one of the tantalizing topics of High
Energy... -
Monika Wüst (University of Würzburg)26/02/2026, 15:50
The study of beyond-classical correlations in final states at colliders
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has received a lot of attention recently. For example, entanglement
of particle pairs has been observed at the LHC. Most importantly,
measurements of such correlations provide new tests of the Standard
Model. More complicated final states are being studied and future colliders with polarized initial states will boost... -
Julia Ziegler (UNI/TH (Uni Hamburg, Institut fuer Theoretische Physik))26/02/2026, 16:00
The Two Higgs Doublet model extended with a complex scalar singlet
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(2HDMS) is a well-motivated Beyond-the-Standard Model candidate with the
potential to explain dark matter (DM). The extended scalar sector results
in three scalar, two charged, one pseudo-scalar and one pseudo-scalar DM
candidate. The DM candidate is provided by the imaginary component
of the complex scalar singlet. It is... -
Olimpia Miniati (Università degli Studi di Bologna and INFN)26/02/2026, 16:20
Within the framework currently adopted for the description of the fundamental interactions, the particles involved in high-energy collisions are expected to exhibit a basic quantum behaviour.
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As a consequence of this statement, a novel class of "quantum" observables for collider studies naturally arises, whose physical interpretation is rooted in the characteristics of the underlying quantum... -
Finn Anthony Mulder (University of Padova, INFN Padova)26/02/2026, 16:30
Sterile neutrinos are attractive dark matter candidates due to their feeble interactions with the Standard Model, cosmological longevity, and natural emergence in extensions of the neutrino sector. Early production mechanisms based on non-resonant active–sterile oscillations, most notably the Dodelson–Widrow (DW) mechanism, are now known to be insufficient to account for the observed dark...
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Clara Hernández García (Universidad de Granada)26/02/2026, 16:40
We revisit the emergence of a Yang-Mills symmetry in theories with massless spin 1 particles from fundamental physical properties of scattering amplitudes. In the standard proofs, some symmetry and reality properties of the coupling constants in three-point amplitudes are assumed. These properties cannot be justified using only three-point amplitudes but we show that they arise as consequences...
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Jose Ramon Espinosa Sedano (IFT-UAM/CSIC, Madrid (ES))27/02/2026, 09:00
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Azadeh Maleknejad (Swansea University), Felix Yu (Johannes Gutenberg University Mainz), Judith Hillier (University of Oxford), Mariangela Lisanti (Princeton University), Valerie Domcke (CERN)27/02/2026, 09:30
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Francesco Costa (Dublin Institute for Advanced Studies, STP)27/02/2026, 11:00
The early Universe is an efficient source of particle production, particularly for light scalar fields. We study the generation of stable scalars that interact only through gravity, focusing on their production during inflation and throughout single- and multi-stage reheating. Gravitational particle production mechanisms are known to be highly efficient and can easily lead to an overabundant...
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Ms Jasmine Thomson-Cooke (Dublin Institute for Advanced Studies)27/02/2026, 11:10
Previous work has shown that the standard Coleman-Weinberg one loop effective potential with one loop thermal masses is both gauge and renormalisation dependent. It also poorly predicts the critical temperature of the electroweak phase transition compared to lattice simulations. One can improve on this approach by using the dimensionally reduced effective potential generated by DRalgo. However...
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Martina La Rosa (Università degli Studi di Padova, INFN Padova)27/02/2026, 11:20
The longitudinal mode of a massive vector field, generated during inflation, offers a well motivated and phenomenologically rich candidate for dark matter. We show that a rapid variation in the mass of the vector boson, occurring during a brief phase of non-slowroll inflationary evolution, can naturally give rise to extremely small vector masses after inflation ends, corresponding to an...
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Azadeh Maleknejad (Swansea University)27/02/2026, 11:30
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Enrico Nardi (NICPB, Tallinn (EE) & INFN-LNF (IT))27/02/2026, 12:00
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Olivier Simon27/02/2026, 14:00
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Sophie Alice Renner (University of Glasgow (GB))27/02/2026, 14:30
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27/02/2026, 15:00
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Prof. Jeonghyeon Song (Konkuk University)
In this talk, we investigate the conditions required to support large CP violation in the Complex Two-Higgs-Doublet Model (C2HDM). By performing a comprehensive global scan of Type-I and Type-II models—incorporating theoretical stability, collider constraints, and the stringent electron EDM (eEDM) bound—we identify distinct phenomenological pathways to large CP-violating effects. We show that...
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