M. Iliescu
A5031518764- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Neutrino Physics Research
- Radioactive Decay and Measurement Techniques
- Nuclear Physics and Applications
- Astrophysics and Cosmic Phenomena
- Quantum Mechanics and Applications
- Ionosphere and magnetosphere dynamics
- Nuclear physics research studies
- High-pressure geophysics and materials
- Atomic and Molecular Physics
- Muon and positron interactions and applications
- X-ray Spectroscopy and Fluorescence Analysis
- Quantum, superfluid, helium dynamics
- Noncommutative and Quantum Gravity Theories
- Geophysics and Gravity Measurements
- History and advancements in chemistry
- Advanced NMR Techniques and Applications
- Magnetic confinement fusion research
- Cold Atom Physics and Bose-Einstein Condensates
Frascati Scienza
2024-2025
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2015-2024
Istituto Nazionale di Fisica Nucleare
1998-2024
Arizona State University
2024
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2018-2023
Politecnico di Milano
2010-2023
Consorzio di Bioingegneria e Informatica Medica
2023
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2020-2023
University of Bologna
2023
RIKEN
1999-2022
The $\bar{K}N$ system at threshold is a sensitive testing ground for low energy QCD, especially the explicit chiral symmetry breaking. Therefore, we have measured $K$-series x rays of kaonic hydrogen atoms DA$\Phi$NE electron-positron collider Laboratori Nazionali di Frascati, and determined most precise values strong-interaction energy-level shift width $1s$ atomic state. As x-ray detectors, used large-area silicon drift detectors having excellent timing resolution, which were developed...
The DEAR (DAPhiNE exotic atom research) experiment measured the energy of x rays emitted in transitions to ground state kaonic hydrogen. values for shift epsilon and width Gamma 1s due K(-)p strong interaction are epsilon(1s)=-193 +/- 37 (stat) 6 (syst) eV Gamma(1s)=249 111 30 eV, most precise yet obtained. pattern hydrogen K-series lines, K(alpha), K(beta), K(gamma), was disentangled first time.
The Physics volume of the DUNE far detector (FD) Technical Design Report (TDR) presents science program DUNE. Within, we describe array identified scientific opportunities and key goals. Crucially, also report our best current understanding capability to realize these goals, along with detailed arguments investigations on which this is based. In context complete set TDR volumes, a central role for document basis underlying conception design LBNF/DUNE experimental configurations. As result,...
The preponderance of matter over antimatter in the early universe, dynamics supernovae that produced heavy elements necessary for life, and whether protons eventually decay -- these mysteries at forefront particle physics astrophysics are key to understanding evolution our its current state, eventual fate. DUNE is an international world-class experiment dedicated addressing questions as it searches leptonic charge-parity symmetry violation, stands ready capture supernova neutrino bursts,...
Kaonic atoms are exotic atomic systems where an electron is replaced by a negatively charged kaon which also experiences the strong interaction with nucleus. Precision spectroscopy of kaonic represents excellent tool to study particles strangeness. This work reviews progress and prospects in modern era atom experiments, discusses constraints on low-energy theories strangeness sector.
We observed a distinct peak in the Λp invariant mass spectrum of He3(K−,Λp)n, well below mK+2mp, i.e., threshold K− to be bound two protons. By selecting relatively large momentum-transfer region q=350∼650 MeV/c, one can kinematically separate from quasi-free process, K‾N→K‾N followed by non-resonant absorption spectator-nucleons K‾NN→ΛN. found that simplest fit gives us Breit–Wigner pole position at BKpp=47±3(stat.)−6+3(sys.) MeV having width ΓKpp=115±7(stat.)−20+10(sys.) MeV, and S-wave...
The goal of the DIRAC experiment at CERN (PS212) is to measure $\pi^+\pi^-$ atom lifetime with 10% precision. Such a measurement would yield precision 5% on value $S$-wave $\pi\pi$ scattering lengths combination $|a_0-a_2|$. Based part collected data we present first result lifetime, $\tau=[2.91 ^{+0.49}_{-0.62}]\times 10^{-15}$ s, and discuss major systematic errors. This corresponds $|a_0-a_2|=0.264 ^{+0.033}_{-0.020} m_{\pi}^{-1}$.
A model where a Dirac fermion is coupled to background dilaton field considered study s-wave scattering of by back ground black hole. It found that an uncomfortable situation towards information loss scenario arises when one loop correction gets involved during bosonization.
The ICARUS-T600 Liquid Argon Time Projection Chamber is operating at Fermilab shallow depth and thus exposed to a high flux of cosmic rays that can fake neutrino interactions. A ray tagging (CRT) system ($\sim$1100 m$^2$), surrounding the cryostat with two layers fiber embedded plastic scintillators, was developed mitigate induced background. Using nanosecond-level timing information, CRT distinguish incoming from outgoing particles interactions in TPC. In this paper an overview system, its...
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...
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 Pauli exclusion principle (PEP) is one of the basic principles modern physics and, even if there are no compelling reasons to doubt its validity, it still debated today because an intuitive, elementary explanation missing, and unique stand among symmetries physics. present Letter reports a new limit on probability that PEP violated by electrons, in search for anomalous Kα line copper: presence this soft X-ray copper fluorescence would signal transition ground state already occupied 2...
The DIRAC experiment at CERN has achieved a sizeable production of $\pi^+\pi^-$ atoms and significantly improved the precision on its lifetime determination. From sample 21227 atomic pairs, 4% measurement S-wave $\pi\pi$ scattering length difference $|a_0-a_2| = (.0.2533^{+0.0080}_{-0.0078}|_\mathrm{stat}.{}^{+0.0078}_{-0.0073}|_\mathrm{syst})M_{\pi^+}^{-1}$ been attained, providing an important test Chiral Perturbation Theory.
The kaonic (3)He and (4)He X-rays emitted in the [Formula: see text] transitions were measured SIDDHARTA experiment. widths of 2p states determined to be text], respectively. Both results are consistent with theoretical predictions. width is much smaller than value by experiments performed 70's 80's, while was for first time.
We have measured the 3d→2p transition x rays of kaonic ^{3}He and ^{4}He atoms using superconducting transition-edge-sensor microcalorimeters with an energy resolution better than 6 eV (FWHM). determined energies to be 6224.5±0.4(stat)±0.2(syst) 6463.7±0.3(stat)±0.1(syst) eV, widths 2.5±1.0(stat)±0.4(syst) 1.0±0.6(stat)±0.3(stat) for ^{4}He, respectively. These values are nearly 10 times more precise in previous measurements. Our results exclude large strong-interaction shifts that suggested...
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 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...
To search for an |${\rm S} = -1$| di-baryonic state which decays to |$\Lambda p$|, the |${}^3{\rm He}(K^-,\Lambda p)n_{\rm missing}$| reaction was studied at 1.0 GeV}/c$|. Unobserved neutrons were kinematically identified from missing mass |$M_{X}$| of p)X$| in order have a large acceptance pn$| final state. The observed events, distributed widely over allowed region Dalitz plot, establish that major component comes three-nucleon absorption process. A concentration events specific neutron...