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A short history of double charge exchange research: From early disappointments to modern excitements
Get PDFOnly since about a decade, the large discovery potential of nuclear double charge exchange (DCE) reactions was realized after abolishing the traditional view of being given by the exchange of proton and neutron pairs between projectile and target nuclei. A new field of research on nuclear reaction and nuclear structure physics is emerging, focused on a specific type of higher order nuclear spectroscopy,
inaccessible otherwise and of large interest for double beta decay
High-energy astrophysical neutrinos
Get PDFA brief overview of the topics covered in my lectures on high-energy astrophysical neutrinos at the 2023 MAYORANA School is provided
Status of the JUNO experiment and its physics perspectives
Get PDFThe JUNO (Jiangmen Underground Neutrino Observatory), a 20
kton multi-purpose underground liquid scintillator detector, has been proposed to address outstanding issues in the neutrino sector. In the initial phase of the experimental effort, the overall concept of the structure of the detector was finalized, leading to the realization of the several components and subsystems comprised in it. Meanwhile, the experimental site was excavated and equipped to host the
experiment. We are now in the final construction stage, with the detector and all its ancillary equipment being assembled underground. The main target of JUNO is the determination of the neutrino mass hierarchy, which will be accessible through the measurement of the antineutrino spectrum from two high power nuclear complexes, 53 km away from the experimental site. In this work, I briefly review the ample
capabilities of the experiment for neutrino physics, which include in addition to the crucial measure of the neutrino hierarchy, the high precision determination of three
oscillation parameters, as well as a vast number of potential astroparticle physics investigations. I illustrate also the main technical characteristics of JUNO, which
form the basis for its ambitious physics goals
Images antiques et humanités numériques: une introduction
Get PDFIntroduction to Images antiques et humanités numériques: section spéciale éditée par le programme ArcheoNu
Dalla replica digitale alla modellazione informativa. Un approccio scan-to-BIM alla documentazione del microscavo e restauro della tomba 27 di Colle Vaccaro (AP)
Get PDFThe widespread integration of digital technologies in the field of archaeology, facilitated by increasingly powerful and economically accessible tools, is producing a profound transformation in the conventional methodologies employed by archaeologists. This contribution specifically delves into the documentation of excavation phases and artifacts, presenting a workflow tested on the tomb 27 of the Colle Vaccaro necropolis (AP) within the educational project managed by the Istituto Centrale del Restauro (ICR). The digital representation of distinct layers and artifacts, developed together with with micro-excavation and restoration operations, serves as a tool for real-time analysis and documentation. Crucially, it acts as a foundational element for constructing an information system geared towards subsequent and more comprehensive historical-archaeological analyses. The outcome of this contribution is the formulation of a semi-automatic process designed to ensure a geometrically accurate and informed three-dimensional representation. This workflow for documenting an excavation and its artifacts is designed to facilitate efficient data utilization both for scholars and professionals
The ReD experiment for low-energy nuclear recoils in a liquid argon TPC
Get PDFTime Projection Chambers filled with Ar in double phase are largely employed in the direct detection of Weakly Interacting Massive Particles (WIMPs) as Dark Matter candidates. Models predict WIMP with a mass at the electroweak scale, so the expected energy of the Ar nuclear recoil after a WIMP-induced scattering is in the range of tens of keV. However, if these particles had mass at the GeV/c2 scale, the deposited energy would drop to a few keV. In this scenario, WIMP direct detection will become challenging but still possible in these detectors, as proved by recent studies on the data collected by DarkSide-50. Since the future generation of multi-tonnes experiments aims to be sensitive also at this low-mass scale, the REcoil Directionality (ReD) experiment underwent a campaign to investigate the ionization response of LAr down to a few keV
Results of multi-module system test for the ATLAS ITk Endcap detector
Get PDFWith the beginning of the High Luminosity phase of the Large
Hadron Collider (LHC) in 2027, the ATLAS detector will have to cope with harsher radiation levels and increased pile-up. To face these challenging conditions the ATLAS inner detector will be completely replaced with a new all-silicon tracking system: the Inner Tracker (ITk). ITk will consist of a pixel detector at a smaller radius and a large area strip detector surrounding it. The pixel detector is equipped with hybrid detectors read out by novel ASICs implemented in 65nm CMOS technology. To save material in the servicing cables, serial powering is employed for the supply voltage of the readout ASICs. This paper will give an overview of the first prototype multi-module system test realized for the ITk outer endcaps focusing on the serial powering scheme implemented via the pre-production on-detector electrical service
The role of positive charge conjugation states in the glueball resonance gas
Get PDFIn this note, we present our recent analyses of the thermodynamic properties of the glueball resonance gas. We observe that the dominant contribution to the thermodynamic quantities, such as pressure, trace anomaly and entropy, is
coming from the free glueball gas with the states having positive charge conjugation (C = +). A comparison of these states obtained from LQCD and functional methods within the glueball resonance gas model is also presented
Understanding the nature of the controversial ρ(1250) meson through the covariant representation of hadrons
Get PDFRecent unitary multichannel reanalysis of elastic ππ-scattering data by Hammoud et al. has offered a clear evidence for the existence of five isovector vector mesons with masses below 1.8 GeV, including the controversial ρ(1250). More recently, following their results, we have found further evidence for the existence of some of these states by analyzing the cross-section data for the e+e− → ωπ process. However, some of these states do not fit to results of typical constituent quark models and the PDG suggested assignments. In this work, in order to clarify the “qq¯” assignments for these ρ states and predict the missing states, we examine their squared mass spectra in a framework of the covariant oscillator quark model, where we propose covariant wave functions of those states. We also investigate their couplings to a pion to check the validity of their assignments
Further evidence for the lower-lying vector meson ρ(1250) in the e+e−→ωπ0 process
Get PDFRecently, strong evidence for the existence of the isovector vector meson with a mass around 1.26 GeV, or ρ(1250), was presented from a unitary multichannel reanalysis of elastic ππ-scattering data by Hammoud et al. In this work, we examine whether the ρ(1250) observed in the ππ-scattering process is also seen in the production process e+e− → ωπ0