A5101742762- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Radiation Detection and Scintillator Technologies
- Crystallography and Radiation Phenomena
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Computational Physics and Python Applications
- Nuclear materials and radiation effects
- Advanced X-ray Imaging Techniques
- Superconducting Materials and Applications
- Black Holes and Theoretical Physics
- Muon and positron interactions and applications
- CCD and CMOS Imaging Sensors
- Particle accelerators and beam dynamics
- Astrophysics and Cosmic Phenomena
- Nuclear physics research studies
- Photocathodes and Microchannel Plates
- Graphene research and applications
- Nuclear Physics and Applications
- Radiation Therapy and Dosimetry
Sapienza University of Rome
2013-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2015-2024
Istituto Nazionale di Fisica Nucleare
2014-2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso
2024
National Agency for New Technologies, Energy and Sustainable Economic Development
2024
ENEA Frascati Research Centre
2024
University of Amsterdam
2024
Universidade Estadual de Campinas (UNICAMP)
2022
Princeton University
2002-2021
Roma Tre University
2021
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.
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.
This article reports world averages for measurements of b-hadron, c-hadron, and tau-lepton properties obtained by the Heavy Flavor Averaging Group (HFAG) using results available at least through end 2009. Some presented use data spring 2010. For averaging, common input parameters used in various analyses are adjusted (rescaled) to values, known correlations taken into account. The include branching fractions, lifetimes, neutral meson mixing parameters, CP violation semileptonic decays.
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
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...
This article reports world averages for measurements of b-hadron and c-hadron properties obtained by the Heavy Flavor Averaging Group (HFAG) using results available at end 2007. For averaging, common input parameters used in various analyses are adjusted (rescaled) to values, known correlations taken into account. The include branching fractions, lifetimes, neutral meson mixing parameters, CP violation semileptonic decays.
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...
Two high-accuracy goniometers equipped with two bent silicon crystals were installed in the betatron cleaning insertion of CERN Large Hadron Collider (LHC) during its long shutdown. First beam tests recently performed at LHC 450 GeV/c and 6500 stored proton beams to investigate feasibility halo collimation assisted by crystals. For first time channeling protons was observed a particle accelerator. A strong reduction losses due nuclear inelastic interactions aligned crystal comparison...
Abstract The workshop “Shedding light on X17” brings together scientists looking for the existence of a possible new particle, often referred to as X17. This hypothetical particle can explain resonant structure observed at $$\sim $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mo>∼</mml:mo> </mml:math> 17 MeV in invariant mass electron-positron pairs, produced after excitation nuclei such $$^8\hbox {Be}$$ <mml:mrow> <mml:msup> <mml:mrow /> <mml:mn>8</mml:mn> </mml:msup>...
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...
The volume reflection phenomenon was detected while investigating 400 GeV proton interactions with bent silicon crystals in the external beam H8 of CERN Super Proton Synchrotron. Such a process observed for wide interval crystal orientations relative to axis, and its efficiency exceeds 95%, thereby surpassing any previously value. These observations suggest new perspectives manipulation high-energy beams, e.g., collimation extraction new-generation hadron colliders, such as Large Hadron...
Directional detection of Dark Matter particles (DM) in the MeV mass range could be accomplished by studying electron recoils large arrays parallel carbon nanotubes. In a scattering process with lattice electron, DM particle might transfer sufficient energy to eject it from nanotube surface. An external electric field is added drive open ends array region. The anisotropic response this scheme, as function orientation target respect wind, calculated, and concluded that no direct measurement...
We propose to achieve the proof-of-principle of PTOLEMY project directly detect Cosmic Neutrino Background (CNB). Each technological challenges described in [1,2] will be targeted and hopefully solved by use latest experimental developments profiting from low background environment provided LNGS underground site. The first phase focus on graphene technology for a tritium target demonstration TES microcalorimetry with an energy resolution better than 0.05 eV electrons. These technologies...
The PTOLEMY project aims to develop a scalable design for Cosmic Neutrino Background (CNB) detector, the first of its kind and only one conceived that can look directly at image Universe encoded in neutrino background produced second after Big Bang. scope work next three years is complete conceptual this detector validate with direct measurements non-neutrino backgrounds are below expected cosmological signal. In paper we discuss details theoretical aspects experiment physics goals....