Tag Archives: Evento scientifico

Speaker: Stefano Morisi (Università Federico II Napoli) I propose two alternatives to the axion mechanism for addressing the strong CP problem. The first approach involves imposing CP as an inherent symmetry of the Lagrangian, which is then spontaneously broken. To generate the correct texture for the Yukawa matrices, is assumed a discrete Z2 symmetry that is softly broken by the scalar potential. By identifying a benchmark point for the Yukawa couplings that aligns with the measured quark masses, the CKM matrix, and low-energy flavor-changing constraints, our findings suggest that this model offers a viable solution to the CP problem I also mention a second approach based on SO(10) GUT model.

Speaker: Sungwoo Youn (IBS, Daejeon) Axions are a well-motivated dark matter candidate arising from the Peccei–Quinn solution to the strong CP problem. The IBS Dark Matter Axion Group (DMAG) is pursuing a comprehensive experimental program to search for axion dark matter using cavity haloscopes, which exploit the axion–photon coupling in strong magnetic fields. In particular, IBS-DMAG has achieved world-leading sensitivity in the GHz frequency range, significantly advancing the exploration of QCD axion parameter space. In this seminar, I will discuss the key experimental techniques underlying these efforts, including high-Q resonant cavities, ultra-low-noise microwave detection, and high-frequency search strategies. I will also present our recent results from the past few years and outline future directions to extend sensitivity and mass coverage.

Speaker: Vindy Prasad (Jilin Univ.) The Standard Model (SM) successfully describes fundamental particles and their interactions but fails to explain several outstanding issues, including the nature of dark matter (DM). DM constitutes approximately one quarter of the total matter density of the universe and is invisible across the electromagnetic spectrum. It may account for observed anomalies such as galaxy rotation curves and other fundamental characteristics of our universe. DM may couple to SM particles via portals. These portals introduce several new physics particles, such as light Higgs boson, dark photon, axion-like particle, and sterile neutrinos. These new physics scenarios may also appear in several baryon- and lepton-number-violating processes. Furthermore, the origin of DM and the observed asymmetry between visible matter and antimatter may be connected through the introduction of a dark baryon. The new physics particles can be accessible at high-intensity electron-positron collider experiments, such as the BESIII experiment, if their masses are in the MeV-GeV range. BESIII has recently explored the possibilities of these new physics scenarios using large data samples collected at several energy points, including the J/psi, psi(2S) and psi(3770) resonances. This talk will review the recent BESIII results related to searches for new physics.

Il Convegno Nazionale SIRR, che ha una cadenza biennale, rappresenta il più importante momento di aggregazione sia per gli iscritti alla Società che per potenziali futuri soci interessati a condividere il loro lavoro e a discuterne le prospettive nei vari ambiti di ricerca coperti dalla SIRR. Il Convegno Nazionale SIRR 2026 è organizzato in collaborazione con l’Istituto Nazionale di Fisica Nucleare (INFN), grazie al recente accordo INFN–SIRR che formalizza e rafforza la sinergia tra le due comunità scientifiche. Sito web: https://web.infn.it/convegnonazionalesirr2026/

Speaker: Fabio Sciarrino (Dipartimento di fisica) Quantum computing harnesses the law of quantum mechanics to perform information processing in ways unattainable by classical devices. This colloquium surveys the current state of quantum computing, discussing leading hardware platforms (superconducting qubits, trapped ions, neutral atoms, and photonics) and recent milestones in scale, coherence, and algorithmic benchmarks. I will highlight integrated quantum photonics – on‑chip sources, reconfigurable interferometers and detectors – discussing its advantages and engineering challenges for scalable processors. The talk also reviews algorithmic progress (quantum simulation, variational methods), error‑mitigation and verification techniques, and key obstacles to fault tolerance: scalable connectivity, practical error correction, and robust quantum‑classical interfaces. Finally, I outline hardware‑software co‑design strategies and emerging hybrid architectures, offering an outlook on research priorities and opportunities for new contributors.

The XXII LNF Spring School “Bruno Touschek” in Nuclear, Subnuclear and Astroparticle Physics will take place at the INFN, Laboratori Nazionali di Frascati, Italy from Monday, May 11th to Friday, May 15th, 2026. The School is addressed to graduate students and young post-doctoral fellows in theoretical and experimental high-energy, nuclear and astroparticle physics. The 2026 edition of the School includes lectures on selected theoretical and experimental topics, discussion sessions, a colloquium and the 9th Young Researchers’ Workshop on “Challenges in high-energy, nuclear and astroparticle physics”, scheduled on Monday, May 11th and on Wednesday, May 13th. Students and postdocs planning to participate in the School are strongly encouraged to apply to give a presentation of their research in the workshop, by sending an email to the school chair, with the proposed talk title. The contributions will be published in Frascati Physics Series. The registration fee is 150 euros and covers lunches at the LNF canteen, coffee breaks, social dinner and excursion. Some funding covering the registration fee is available for participants giving talks in the Young Researchers’ Workshop.

Speaker: Simone Manti (Istituto Nazionale di Fisica Nucleare) VOXES is a high-resolution X-ray spectrometer developed at the INFN Laboratori Nazionali di Frascati for X-ray spectroscopy measurements in the 5 to 50 keV energy range, with applications to both X-ray fluorescence and absorption studies. Based on the Von Hamos geometry, the setup is designed to provide a few-eV energy resolution (FWHM), depending on the adopted crystal, detector, and measurement conditions. One of the distinctive features of VOXES is its capability to perform high-resolution measurements also on extended sources, enabled by the combined use of crystal dispersion and slit-based source shaping. In this talk, after introducing the main characteristics of the spectrometer, I will show how these features make VOXES a flexible platform for a broad range of applications. The setup includes mosaic and germanium crystals, strip, CCD, and pixel detectors, and X-ray tubes with Mo and W anodes operating up to 80 kV and currents of the order of mA. The system is installed in a dedicated shielded bunker, suitable for experimental integration and further developments. The spectrometer is fully motorized for alignment procedures and complemented by auxiliary diagnostics, including a pin diode for monitoring, ensuring operational flexibility and reproducibility. On this basis, I will discuss selected application areas that illustrate the scientific and technological relevance of VOXES for LNF activities. These include measurements on liquid samples for edible-liquid analysis within the MITIQO project, measurements on perovskite detectors, imaging with the GEM detector, and ongoing activities in collaboration with ENEA on …

Speaker: Giacomo Santoni (Istituto Nazionale di Fisica Nucleare) Twist-2 operators are fundamental for the study of deep inelastic scattering in QCD because they dominate the operator product expansions on the light-cone. Recently, it was discovered that the Euclidean UV-asymptotic generating functional of the connected correlators of twist-2 operators provides highly nontrivial constraints on the yetto-come nonperturbative solution of large-N SU(N) YM theory. We extend these results to N=1 supersymmetric Yang-Mills (SYM) theory by providing a new construction of twist-2 operators in terms of covariant superfields. This construction is manifestly gauge-invariant and SUSY-covariant and makes their one-loop renormalization and mixing properties considerably transparent. We compute their asymptotic renormalization-group improved generating functional in Euclidean superspace and its planar and leading nonplanar large-N expansion. We verify that the leading nonplanar asymptotic renormalization-group improved generating functional matches the structure of logarithm of a functional superdeterminant of the corresponding nonperturbative object arising from the glueball/gluinoball effective action, which it should be asymptotic to at short distances because of the asymptotic freedom.

Speaker: Krzysztof Mekala (University of Warsaw) Among proposed future projects for particle physics, the Muon Collider has recently attracted significant attention. By combining features of both electron–positron and hadron machines, it offers a potentially powerful environment for exploring high-energy interactions. While technological challenges remain, recent studies suggest none are fundamentally prohibitive, motivating continued research in this direction. In this talk, I will briefly introduce the Muon Collider in the context of the Update of the European Strategy for Particle Physics and outline the physics opportunities it could offer. I will focus in particular on studies of electroweak interactions at previously unexplored energy scales. After discussing the role of vector boson fusion in this regime, I will review the ideas of the collinear approximation and electroweak factorisation. Finally, I will present the emerging framework of Electroweak Parton Distribution Functions and discuss their relevance for describing high-energy processes.