Welcom message from the Head of the Department of Physics and Astrophysics of the Padua University
When the QCD axion is absent in full theory, the strong CP problem has to
be explained by an additional mechanism, e.g., the left-right symmetry. Even though tree-
level QCD θ ̄ parameter is restricted by the mechanism, radiative corrections to θ ̄ are mostly
generated, which leads to a dangerous neutron electric dipole moment (EDM). The ordinary
method for calculating the radiative θ ̄...
We present constraints on Axion-Like Particles using very-high-energy gamma-ray data from the MAGIC telescopes in the direction of the Perseus Galaxy Cluster. Axion is envisioned and theorized as a solution to the Strong CP problem of the Standard Model. As a generalization of the axion, axion-like particles are introduced. Depending on the specifics of their production mechanisms in the Early...
[[hep-ph/2308.01336][1]]
We explore the impact of highly excited bound states on the evolution of number densities of new physics particles, specifically dark matter, in the early Universe. Focusing on dipole transitions within perturbative, unbroken gauge theories, we develop an efficient method for including around a million bound state formation and bound-to-bound transition processes....
This poster presents the performance evaluation and electronics development of a new inner-station Thin Gap Chamber (TGC) detector for the ATLAS experiment at HL-LHC. The ATLAS experiment at HL-LHC aims to obtain up to 4000 fb^-1 of proton collision data to improve the sensitivity for the search of new particles, including candidates for dark matter. To select interesting events from the vast...
The neutralinos are well-motivated dark matter candidates and have been studied extensively. If the mass difference between the neutralino and chargino is relatively small, then they can be detected as, for example, disappearing charged tracks or soft pions in collider experiments. The constraint on the chargino mass by those experiments strongly depends on the chargino lifetime and branching...
We discuss a dark photon model with the successive symmetry breaking $\mathrm{SU(2)_D}\to \mathrm{U(1)_D}\to\mathbb{Z}_2$ in the dark sector. Various dark topological defects appear, such as monopoles, dyons, strings and beads. They are shown to induce QED electromagnetic fields through kinetic and magnetic mixing between $\mathrm{U(1)_{QED}}$ and $\mathrm{U(1)_D}$. In particular, dark beads...
The GERmanium Detector Array (GERDA) experiment at the Laboratori Nazionali del Gran Sasso (LNGS, Italy) searched for the lepton-number-violating neutrinoless double-beta ($0\nu\beta\beta$) decay of $^{76}$Ge. The potential discovery of such a phenomenon would have significant implications in cosmology and particle physics, helping unrevealing the Majorana nature of neutrinos.
The main...
