A5059738824- Superconducting and THz Device Technology
- Neutrino Physics Research
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Radiation Detection and Scintillator Technologies
- Physics of Superconductivity and Magnetism
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Thermal Radiation and Cooling Technologies
- Astrophysical Phenomena and Observations
- Superconductivity in MgB2 and Alloys
- Muon and positron interactions and applications
- Calibration and Measurement Techniques
- Scientific Research and Discoveries
- Gamma-ray bursts and supernovae
- Spacecraft and Cryogenic Technologies
- Nuclear Physics and Applications
- Microwave Engineering and Waveguides
- Advanced Semiconductor Detectors and Materials
- Radio Astronomy Observations and Technology
- Semiconductor Quantum Structures and Devices
- Cosmology and Gravitation Theories
University of Genoa
2016-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Genova
2015-2024
University of Milano-Bicocca
2018-2023
Istituto Nazionale di Fisica Nucleare
2008-2022
University of Pavia
2006-2016
The University of Tokyo
2014-2016
Istituto Nazionale di Fisica Nucleare, Sezione di Pavia
2014-2016
Sapienza University of Rome
2016
Goddard Space Flight Center
2010
SRON Netherlands Institute for Space Research
2006-2010
The final results of the search for lepton flavour violating decay $$\mathrm {\mu }^+ \rightarrow \mathrm {e}^+ {\gamma }$$ based on full dataset collected by MEG experiment at Paul Scherrer Institut in period 2009–2013 and totalling $$7.5\times 10^{14}$$ stopped muons target are presented. No significant excess events is observed with respect to expected background a new upper limit branching ratio this $$ \mathcal{B} (\mu ^+ \mathrm{e}^+ \gamma ) < 4.2 \times 10^{-13}$$ (90 % confidence...
The analysis of a combined data set, totaling 3.6 × 10(14) stopped muons on target, in the search for lepton flavor violating decay μ(+) → e(+)γ is presented. collected by MEG experiment at Paul Scherrer Institut show no excess events compared to background expectations and yield new upper limit branching ratio this 5.7 10(-13) (90% confidence level). This represents four times more stringent than previous world best set MEG.
We report the direct measurement of 7Be solar neutrino signal rate performed with Borexino detector at Laboratori Nazionali del Gran Sasso. The interaction 0.862 MeV neutrinos is 49+/-3stat+/-4syst counts/(day.100 ton). hypothesis no oscillation for inconsistent our 4sigma C.L. Our result first survival probability nu(e) in transition region between matter-enhanced and vacuum-driven oscillations. improves experimental determination flux 7Be, pp, CNO nu(e), limit on effective magnetic moment...
The MEG experiment, designed to search for the mu+->e+ gamma decay at a 10^-13 sensitivity level, completed data taking in 2013. In order increase reach of experiment by an magnitude level 6 x 10-14 branching ratio, total upgrade, involving substantial changes has been undertaken, known as II. We present both motivation upgrade and detailed overview design expected detector performance.
We present a new result based on an analysis of the data collected by MEG detector at Paul Scherrer Institut in 2009 and 2010, search lepton-flavor-violating decay μ+→e+γ. The likelihood combined sample, which corresponds to total 1.8×1014 muon decays, gives 90% C.L. upper limit 2.4×10−12 branching ratio μ+→e+γ decay, constituting most stringent existence this date.Received 31 July 2011DOI:https://doi.org/10.1103/PhysRevLett.107.171801© 2011 American Physical Society
The X-ray Integral Field Unit (X-IFU) is the high resolution spectrometer of ESA Athena observatory. Over a field view 5' equivalent diameter, it will deliver spectra from 0.2 to 12 keV with spectral 2.5 eV up 7 on ∼ 5" pixels. X-IFU based large format array super-conducting molybdenum-gold Transition Edge Sensors cooled at 90 mK, each coupled an absorber made gold and bismuth pitch 249 μm. A cryogenic anti-coincidence detector located underneath prime TES enables non background be reduced....
Abstract The MEG II experiment, based at the Paul Scherrer Institut in Switzerland, reports result of a search for decay $$\upmu ^+ \rightarrow {\textrm{e}}^+ \upgamma $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msup> <mml:mi>μ</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:mo>→</mml:mo> <mml:mtext>e</mml:mtext> </mml:mrow> <mml:mi>γ</mml:mi> </mml:math> from data taken first physics run 2021. No excess events over expected background is observed, yielding an...
The European Research Council has recently funded HOLMES, a new experiment to directly measure the neutrino mass. HOLMES will perform calorimetric measurement of energy released in decay 163Ho. eliminates systematic uncertainties arising from use external beta sources, as experiments with spectrometers. This was proposed 1982 by A. De Rujula and M. Lusignoli, but only detector technological progress allowed design sensitive experiment. deploy large array low temperature microcalorimeters...
The X-ray Integral Field Unit (X-IFU) on board the Advanced Telescope for High-ENergy Astrophysics (Athena) will provide spatially resolved high-resolution spectroscopy from 0.2 to 12 keV, with 5 arc second pixels over a field of view minute equivalent diameter and spectral resolution 2.5 eV up 7 keV. In this paper, we first review core scientific objectives Athena, driving main performance parameters X-IFU, namely resolution, view, effective area, count rate capabilities, instrumental...
The MEG (Mu to Electron Gamma) experiment has been running at the Paul Scherrer Institut (PSI), Switzerland since 2008 search for decay μ +→e+ γ by using one of most intense continuous + beams in world. This paper presents components: positron spectrometer, including a thin target, superconducting magnet, set drift chambers measuring muon vertex and momentum, timing counter time, liquid xenon detector photon energy, position time. trigger system, read-out electronics data acquisition system...
Abstract The MEG II experiment, located at the Paul Scherrer Institut (PSI) in Switzerland, is successor to which completed data taking 2013. started fully operational 2021, with goal of improving sensitivity $$\upmu ^+ \rightarrow {\textrm{e}}^+ \upgamma $$ <mml:math...
We are developing the Cryogenic AntiCoincidence detector (CryoAC) of ATHENA X-IFU spectrometer. It is a TES-based particle aimed to reduce background instrument. Here, we present result obtained with last CryoAC single-pixel prototype. based on 1 cm2 silicon absorber sensed by single 2mm x 1mm Ir/Au TES, featuring an on-chip heater for calibration and diagnostic purposes. have illuminated sample 55Fe (6 keV line) 241Am (60 radioactive sources, thus studying response accuracy at low energy....
Athena is designed to implement the Hot and Energetic Universe science theme selected by European Space Agency for second large mission of its Cosmic Vision program. The payload consists a aperture high angular resolution X-ray optics (2 m2 at 1 keV) twelve meters away, two interchangeable focal plane instruments: Integral Field Unit (X-IFU) Wide Imager. X-IFU cryogenic spectrometer, based on array Transition Edge Sensors (TES), offering 2:5 eV spectral resolution, with ~5" pixels, over...
High-time-resolution counters based on plastic scintillator with silicon photomultiplier (SiPM) readout have been developed for applications to high energy physics experiments which relatively large-sized are required. We studied counter sizes up $120\times40\times5$ mm^3 series connection of multiple SiPMs increase the sensitive area and thus achieve better time resolution. A scheme analog shaping digital waveform analysis is optimized highest The timing performance measured using electrons...
The MEG experiment took data at the Paul Scherrer Institute in years 2009–2013 to test violation of lepton flavor conservation law, which originates from an accidental symmetry that Standard Model elementary particle physics has, and published most stringent limit on charged violating decay μ+→e+γ: BR(μ+→e+γ) <4.2×10−13 90% confidence level. detector has been upgraded order reach a sensitivity 6×10−14. basic principle II is achieve highest possible using full muon beam intensity (7×107...