R. Del Grande
A5068486594- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Dark Matter and Cosmic Phenomena
- Medical Imaging Techniques and Applications
- Nuclear Physics and Applications
- Quantum Mechanics and Applications
- Nuclear physics research studies
- Radioactive Decay and Measurement Techniques
- Muon and positron interactions and applications
- Nuclear reactor physics and engineering
- Noncommutative and Quantum Gravity Theories
- Ionosphere and magnetosphere dynamics
- High-pressure geophysics and materials
- Advanced Semiconductor Detectors and Materials
- Superconducting Materials and Applications
- Black Holes and Theoretical Physics
- Geophysics and Gravity Measurements
- Statistical Methods and Bayesian Inference
- Magnetic confinement fusion research
- Neutrino Physics Research
- X-ray Spectroscopy and Fluorescence Analysis
Technical University of Munich
2020-2025
Institut für Technische und Angewandte Physik (Germany)
2024-2025
Universidad Nacional Autónoma de México
2022-2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2015-2024
Istituto Nazionale di Fisica Nucleare
2019-2024
Excellence Cluster Universe
2020-2024
A. Alikhanyan National Laboratory
2022-2024
Excellence Cluster Origins
2024
Western Norway University of Applied Sciences
2023
Comenius University Bratislava
2023
(Abridged) We present the first public release of high-quality data products (DR1) from Hi-GAL, {\em Herschel} infrared Galactic Plane Survey. Hi-GAL is keystone a suite continuum surveys near-IR to radio, and covers five wavebands at 70, 160, 250, 350 500 micron, encompassing peak spectral energy distribution cold dust for 8 < T 50K. This inner Milky Way in longitude range 68{\deg} > l -70{\deg} |b|<1{\deg} latitude strip. Photometric maps have been produced with ROMAGAL pipeline, that...
In living organisms, the positron-electron annihilation (occurring during PET imaging) proceeds in about 30% via creation of a metastable ortho-positronium atom. tissue, due to pick-off and conversion processes, over 98% ortho-positronia annihilate into two 511 keV photons. this article, we assess feasibility for reconstruction mean lifetime image based on annihilations The main objectives work include (i) estimation sensitivity total-body scanners imaging using 2γ (ii) spatial time...
J-PET is a detector optimized for registration of photons from the electron-positron annihilation via plastic scintillators where interact predominantly Compton scattering. Registration both primary and scattered enables to determinate linear polarization photon on event by basis with certain probability. Here we present quantitative results feasibility such measurements decay positronium explore physical limitations resolution determination 511 keV For scattering angles about 82 ∘ (where...
The SIDDHARTA-2 collaboration is performing research in the field of kaonic atoms spectroscopy. In this work, following an introduction on and their importance for development low-energy strong interaction theories, first result experiment (kaonic helium) presented. This measurement was promising view main goal experiment, i.e. deuterium transitions to 1s level, important model kaon-nucleon interaction. last part paper future plans measure new key quantities with beyond stat-of-the-art...
Abstract Purpose The time-over-threshold (TOT) technique is being used widely due to itsimplications in developing the multi-channel readouts, mainly when fast signal processing required. Using TOT technique, as a measure of energy loss instead charge integration methods, significantly reduces readout costs by combining time and information. Therefore, this approach can potentially be utilized J-PET tomograph which built from plastic scintillators characterized light signals. drawback...
A large area silicon drift detectors (SDDs) system and its readout electronics have been developed by the SIDDHARTA-2 Collaboration, aiming to perform high-precision light kaonic atoms x-ray spectroscopy for investigation of strong interaction in low-energy QCD regime. To these measurements, a linear energy response good resolution are mandatory requirements system, be preserved along whole DAQ (analog digital) chain; such task is made even harder experimental environment particles...
Abstract The current work presents the optimization of large area silicon drift detectors developed by SIDDHARTA-2 collaboration for high precision x-ray measurements light exotic atom transitions. Two different radiation sources were employed in study: an tube, investigating energy resolution and charge collection efficiency device range 4000 eV–13 000 eV, a β − 90 Sr radioactive source measuring timing response, thus qualifying parameters inside semiconductor. study reports spectroscopic...
The most important information still missing in the field of low-energy antikaon-nucleon inter actions studies is experimental determination hadronic energy shift and width kaonic deuterium. This measurement will be performed by SIDDHARTA-2 experiment, installed at DAΦNE collider presently data taking campaign. precise 1s level with respect to purely electromagnetic calculated values, generated presence strong interaction, through X-ray transitions this level, hydrogen, was SIDDHARTA...
Pauli exclusion principle (PEP) violations induced by space-time noncommutativity, a class of universality for several models quantum gravity, are investigated the VIP-2 Lead experiment at Gran Sasso underground National Laboratory INFN. The experimental bound on noncommutative scale $\mathrm{\ensuremath{\Lambda}}$ excludes $\ensuremath{\theta}$-Poincar\'e far above Planck non anishing ``electriclike'' components ${\ensuremath{\theta}}_{\ensuremath{\mu}\ensuremath{\nu}}$, and up to...
Scattering experiments with three free nucleons in the ingoing channel are extremely challenging terrestrial laboratories. Recently, ALICE Collaboration successfully measured scattering of protons indirectly, by using femtoscopy method high-energy proton-proton collisions at Large Hadron Collider. In order to establish a connection current and future measurements femtoscopic three-particle correlation functions, we analyze scenarios involving nnn ppp systems hyperspherical adiabatic basis....
We present the analysis of K− absorption processes on He4 leading to Λπ− final states, measured with KLOE spectrometer at DAΦNE e+e− collider and extract, for first time, modulus non-resonant K−n →Λπ− direct production amplitude about 33 MeV below K‾N threshold. This also allows disentangle nuclear at-rest from in-flight capture, momenta 120 MeV. The data are interpreted help a phenomenological model, is found be |AK−n→Λπ−|=(0.334±0.018stat−0.058+0.034syst)fm.
The determination of low-energy cross sections and branching ratios the $$\hbox {K}^-$$ multi-nucleon absorption processes in $$\Lambda \hbox {p}$$ $$\Sigma ^0\hbox final states performed by AMADEUS collaboration is presented. Low momentum ( $$p_{\mathrm{K}} \simeq 127\ {MeV}/\hbox {c}$$ ) produced at {DA}\Phi {NE}$$ collider are impinged on a Carbon target within KLOE detector two three nucleon disentangled comparing experimental data to phenomenological calculations. spectra interpreted...
Abstract We study spontaneous radiation emission from matter, as predicted by the Continuous Spontaneous Localization (CSL) collapse model. show that, in an appropriate range of energies emitted radiation, largest contribution comes atomic nuclei. Specifically, we that energy $$E\sim 10\,-\,10^{5}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>E</mml:mi> <mml:mo>∼</mml:mo> <mml:mn>10</mml:mn> <mml:mspace /> <mml:mo>-</mml:mo> <mml:msup> <mml:mn>5</mml:mn>...
The SIDDHARTINO experiment at the DA{\Phi}NE Collider of INFN-LNF, pilot run for SIDDHARTA-2 which aims to perform measurement kaonic deuterium transitions fundamental level, has successfully been concluded. paper reports main results this run, including optimization various components apparatus, among degrader needed maximize fraction kaons stopped inside target, through measurements helium 2p level. obtained shift and width values are {\epsilon}_2p = E_exp-E_e.m 0.2 {\pm} 2.5(stat) 2(syst)...
Violations of the Pauli Exclusion Principle (PEP), albeit small, could be motivated by physics beyond Standard Model, ranging from violation Lorentz invariance to extra space dimensions. This scenario can experimentally constrained through dedicated, state-of-the-art X-ray spectroscopy, searching for a forbidden atomic transition L shell K already occupied two electrons. The VIP-2 Experiment located at underground Gran Sasso National Laboratories INFN (Italy) tests PEP violations introducing...
Investigations of possible violations the Pauli exclusion principle represent critical tests microscopic space-time structure and properties. Space-time noncommutativity provides a class universality for several quantum gravity models. In this context VIP-2 lead experiment sets strongest bounds, searching violating atomic transitions in lead, excluding θ-Poincaré noncommutative models far above Planck scale nonvanishing θ_{μν} electriclike components, up to 6.9×10^{-2} scales if θ_{0i}=0.
Abstract The SIDDHARTA-2 experiment at the DAΦNE collider aims to perform first kaonic deuterium x-ray transitions fundamental level measurement, with a systematic error of few eV. To achieve this challenging goal experimental apparatus is equipped 384 Silicon Drift Detectors (SDDs) distributed around its cryogenic gaseous target. SDDs developed by collaboration are suitable for high precision atoms spectroscopy, thanks their energy and time resolutions combined radiation hardness. response...
The existence of a nucleon–ϕ (N–ϕ) bound state has been subject theoretical and experimental investigations for decades. In this letter, indication p–ϕ is found, using the first time two-particle correlation functions as alternative to invariant mass spectra. Newly available lattice calculations spin 3/2 N–ϕ interaction by HAL QCD collaboration are used constrain 1/2 counterpart from fit function measured ALICE. corresponding scattering length effective range...
Abstract In this paper we present the results of a new kaonic helium-4 measurement with 1.37 g l −1 gaseous target by SIDDHARTA-2 experiment at DAΦNE collider. We measured, for first time, energies and yields three transitions belonging to M-series. Moreover, improved factor about three, statistical precision 2p level energy shift width induced strong interaction, obtaining most precise helium, measured yield L α transition employed density, providing experimental input investigate density...
Kaonic atoms measure the antikaon-nucleus interaction at almost zero relative energy, allowing one to determine basic low-energy quantum chromodynamics (QCD) quantities, namely, antikaon-nucleon ( K ¯ N) scattering lengths. The latter are important for extracting sigma terms which built on symmetry breaking part of Hamiltonian, thereby providing a chiral and SU(3) symmetries breaking. After discussing their relations kaonic atoms, we describe most precise measurement in literature hydrogen,...
Kaonic atoms are an extremely efficient tool to investigate the strong interaction at low energy Frontier, since they provide direct access K − N threshold, eliminating necessity for extrapolation, unlike in case of scattering experiments. During 1970s and 1980s, extensive studies were performed on kaonic spanning across a broad spectrum elements periodic table, ranging from lithium uranium. These measurements provided inputs constraints theoretical description antikaon-nuclei potential....
Abstract In recent years the femtoscopy technique has been used by ALICE Collaboration in small colliding systems at LHC to investigate strong-interaction of hadron pairs low-energy regime. The extension this study many-body correlations aims deliver next first experimental measurements genuine many-hadron interactions, provided that contributions due lower order terms are properly accounted for. paper we present a method allows determine residual three-body correlation functions, based on...