A5024889969- Particle physics theoretical and experimental studies
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Radioactive Decay and Measurement Techniques
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Quantum Mechanics and Applications
- Gyrotron and Vacuum Electronics Research
- Advanced X-ray Imaging Techniques
- Dark Matter and Cosmic Phenomena
- Radiation Therapy and Dosimetry
- Ionosphere and magnetosphere dynamics
- High-pressure geophysics and materials
- Muon and positron interactions and applications
- Magnetic confinement fusion research
- Biofield Effects and Biophysics
- X-ray Spectroscopy and Fluorescence Analysis
- Noncommutative and Quantum Gravity Theories
- Advanced Semiconductor Detectors and Materials
- Advanced Chemical Physics Studies
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2015-2024
Istituto Nazionale di Fisica Nucleare
2007-2024
University of Palermo
2024
Institute of Nuclear Physics
2024
RIKEN
2011-2022
Excellence Cluster Universe
2021-2022
Technical University of Munich
2022
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso
2022
Enrico Fermi Center for Study and Research
2021-2022
Osaka University
2022
The electron-positron collider DAPhiNE, the Italian Phi factory, has been recently upgraded in order to implement an innovative collision scheme based on large crossing angle, small beam sizes at point, and compensation of beam-beam interaction by means sextupole pairs creating a "crab-waist" configuration region. Experimental tests novel exhibited increase factor 3 peak luminosity with respect performances reached before upgrade. In this Letter we present new scheme, discuss its advantages,...
About a hundred years ago, the Russian biologist A. Gurwitsch, based on experiments with onion plants by measuring their growth rate, hypothesized that emit weak electromagnetic field somehow influences cell growth. This interesting observation remained fundamentally ignored scientific community; only in 1950s emission from some was measured using photomultiplier used single counting mode. Later, 1980s, several groups around world started extensive work to understand origin and role of this...
SPARC (acronym of ``Sorgente Pulsata ed Amplificata di Radiazione Coerente'', i.e. Pulsed and Amplified Source Coherent Radiation) is a single pass free-electron laser designed to obtain high gain amplification at radiation wavelength 500 nm. Self-amplified spontaneous emission has been observed driving the amplifier with high-brightness beam linac. We report measurements energy, spectra, exponential gain. Experimental results are compared simulations from several numerical codes.
The possible existence of deeply bound $\bar K$-nucleus states (kaonic nuclei) has been widely discussed as a consequence the strongly attractive K N$ interaction in I = 0 channels. For simplest kaonic nucleus, KNN$, we observed significant peak structure that can be interpreted ``$K^-pp$'' state using $^3$He$(K^-,N)$ reactions at J-PARC. To further understand nuclei, have proposed and prepared an experiment to precisely measure NNN$ system $^4$He$(K^-,N)$ first step towards comprehensive...
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...
In this Letter we report the first experimental observation of double emittance minimum effect in beam dynamics high-brightness electron generation by photoinjectors; effect, as predicted theory, is crucial achieving photoinjectors aiming at producing beams for short wavelength single-pass free lasers. The experiment described was performed SPARC photoinjector site, during stage commissioning project. made possible a newly conceived device, called an meter, which allows detailed and...
The machine described in this document is an advanced Source of up to 20 MeV Gamma Rays based on Compton back-scattering, i.e. collision intense high power laser beam and a brightness electron with maximum kinetic energy about 720 MeV. Fully equipped collimation characterization systems, order generate, form fully measure the physical characteristics produced Ray beam. quality, phase space density, two colliding beams will be such that emitted ray characterized by tunability, spectral...
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...
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...
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...
The new generation of linac injectors driving free electron lasers in the self-amplified stimulated emission (SASE-FEL) regime requires high brightness beams to generate radiation wavelength range from UV x rays. choice injector working point and its matching structure are key factors meet this requirement. An emittance compensation scheme presently applied several photoinjectors worldwide is known as "Ferrario" point. In spite great importance there was, so far, no direct measurement beam...
The spin–statistics connection, in particular the Pauli exclusion principle (PEP), plays a very important role our comprehension of matter and nature. Presently, PEP violation, possible within some theories, generates lively debate; it has given birth to few experiments looking for tiny effects. violation experiment put strong limit on probability by electrons, using method searching forbidden atomic transitions copper target. In this paper we present experiment, obtained results future...
The VIolation of Pauli exclusion principle -2 experiment, or VIP-2 at the Laboratori Nazionali del Gran Sasso searches for X-rays from copper atomic transitions that are prohibited by principle. Candidate direct violation events come transition a 2p electron to ground state is already occupied two electrons. From first data taking campaign in 2016 we determined best upper limit [Formula: see text] probability such exists. Significant improvement control experimental systematics was also...
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 copper $K$-edge x-ray-absorption near-edge structure (XANES) of Y${\mathrm{Ba}}_{2}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{7}$ has been analyzed by using the full multiple-scattering approach. By atomic coordinates orthorhombic oxygen-deficient perovskite structure, absorption spectra both Cu(1) and Cu(2) sites have calculated. All features experimental Cu XANES spectrum can be simply interpreted as arising from one-electron transition to final states mainly determined distribution in large...
In this paper, we discuss the recent finalized analyses by KLOE experiment at DAΦNE: CPT and Lorentz invariance test with entangled K 0 K0 pairs, precision measurement of branching fraction decay + → π -π (γ).We also present status an ongoing analysis aiming to precisely measure ± mass.
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...
The validity of the Pauli Exclusion Principle, a building block Quantum Mechanics, is tested for electrons. VIP (VIolation exclusion principle) and its follow-up VIP-2 experiments at Laboratori Nazionali del Gran Sasso search x-rays from copper atomic transition that are prohibited by Principle. candidate events, if they exist, originate $2p$ orbit electron to ground state which already occupied two present limit on probability Principle violation electrons set experiment 4.7 $\times$ 10...
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,...