E. Baracchini
A5114378273- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Neutrino Physics Research
- Radiation Detection and Scintillator Technologies
- Medical Imaging Techniques and Applications
- CCD and CMOS Imaging Sensors
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Computational Physics and Python Applications
- Superconducting Materials and Applications
- Black Holes and Theoretical Physics
- Astrophysics and Cosmic Phenomena
- Nuclear physics research studies
- Cosmology and Gravitation Theories
- Muon and positron interactions and applications
- Nuclear Physics and Applications
- Mechanical and Optical Resonators
- Stochastic processes and financial applications
- Spectroscopy and Laser Applications
- Advanced MEMS and NEMS Technologies
- Radioactive Decay and Measurement Techniques
- Photonic and Optical Devices
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso
2020-2024
University of Coimbra
2022-2024
Gran Sasso Science Institute
2018-2024
Istituto Nazionale di Fisica Nucleare
2016-2024
Sapienza University of Rome
2007-2022
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2007-2022
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2016-2020
The University of Tokyo
2013-2018
Enrico Fermi Center for Study and Research
2017
University of California, Irvine
2010-2014
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.
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 present report documents the results of Working Group 2: B, D and K decays, workshop on Flavor in Era LHC, held at CERN from November 2005 through March 2007. With advent we will be able to probe New Physics (NP) up energy scales almost one order magnitude larger than it has been possible with accelerator facilities. While direct detection new particles main avenue establish presence NP indirect searches provide precious complementary information, since most probably not measure full...
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...
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...
Now that conventional weakly interacting massive particle (WIMP) dark matter searches are approaching the neutrino floor, there has been a resurgence of interest in detectors with sensitivity to nuclear recoil directions. A large-scale directional detector is attractive it would have below be capable unambiguously establishing galactic origin purported signal, and could serve dual purpose as observatory. We present first detailed analysis 1000 m$^3$-scale measuring signal at low energies....
The search for a novel technology able to detect and reconstruct nuclear electron recoil events with the energy of few keV has become more important now that large regions high-mass dark matter (DM) candidates have been excluded. Moreover, detector sensitive incoming particle direction will be crucial in case DM discovery open possibility studying its properties. Gaseous time projection chambers (TPC) optical readout are very promising detectors combining detailed event information provided...
Optical readout of GEM based devices by means high granularity and low noise CMOS sensors allows to obtain very interesting tracking performance. Space resolution the order tens μm were measured on plane along with an energy 20%÷30%. The main limitation is represented their poor information about time structure event. In this paper, use a concurrent light suitable photomultiplier acquisition electric signal induced electrode are exploited provide necessary timing informations. analysis PMT...
We present measurements of drift velocities and mobilities some innovative negative ion gas mixtures at nearly atmospheric pressure based on SF$_{6}$ as electronegative capture agent pure various pressures, performed with the NITEC detector. is a Time Projection Chamber 5 cm distance readout by GEMPix, triple thin GEMs coupled to Quad-Timepix chip, directly sensitive deposited charge each 55 $\times$ $\mu$m$^2$ pixel. Our results contribute expanding knowledge use extend possibility...
Drift chambers operated with helium-based gas mixtures represent a common solution for tracking charged particles keeping the material budget in sensitive volume to minimum. The drawback of this is worsening spatial resolution due primary ionisation fluctuations, which limiting factor high granularity drift like MEG II tracker. We report on measurements performed three different prototypes chamber aimed at determining achievable single-hit resolution. were helium/isobutane and exposed cosmic...
The CYGNO project has the goal to use a gaseous TPC with optical readout detect dark matter and solar neutrinos low energy threshold directionality. demonstrator will consist of 1 m 3 volume filled He:CF 4 gas mixture at atmospheric pressure. Optical high granularity CMOS sensors, combined fast light detectors, provide detailed reconstruction event topology. This allow discriminate nuclear recoil signal from background, mainly represented by electron recoils induced radioactivity. Thanks...
The search for a novel technology able to detect and reconstruct nuclear recoil events in the keV energy range has become more important as long vast regions of high mass WIMP-like Dark Matter candidate have been excluded. Gaseous Time Projection Chambers (TPC) with optical readout are very promising combining complete event information provided by TPC technique sensitivity granularity last generation scientific light sensors. A an amplification at anode obtained Gas Electron Multipliers...
We studied the radiative muon decay $μ^+ \to e^+ν\barνγ$ by using for first time an almost fully polarized source. identified a large sample (~13000) of these decays in total 1.8x10^14 positive collected MEG experiment years 2009--2010 and measured branching ratio B($μ^+ e^+ν\barνγ$) = (6.03+-0.14(stat.)+-0.53(sys.))x10^-8 E_e > 45 MeV E_γ 40 MeV, consistent with Standard Model prediction. The precise measurement this mode provides basic tool timing calibration, normalization channel,...
Optical readout of large Time Projection Chambers (TPCs) with multiple Gas Electron Multipliers (GEMs) amplification stages has shown to provide very interesting performances for high energy particle tracking. Proposed applications low-energy and rare event studies, such as Dark Matter search, ask demanding performance in the keV range. The a was studied details function electric field configuration GEM gain by using 55Fe source within 7 litre sensitive volume detector developed part R&D...
We present analytic expressions to evaluate at O(alpha) the effects of soft-photon emission, and related virtual corrections, in non-leptonic decays type B,D -> P1 P2, where P2 are scalar or pseudoscalar particles. The phenomenological implications these results briefly discussed. For B into charged pions emission quite large: corrections rates can easily exceed 5% level if tight cuts on photon energy applied.
The \(R\&D\) of a gas detector prototype for high precision tracking low energy nuclear recoils over large volume is presented in this paper. scintillation light accompanying the electronic avalanches triple GEM structure detected by CMOS-based camera. sensor provides very granularity along with noise and sensitivity. Space resolution order tens \(\mu\)m were measured on plane (\({\it x,y}\)). Negative Ion Drift method to reconstruct depth track within sensitive was studied. Recent tests...
Abstract The nature of dark matter is still unknown and an experimental program to look for particles in our Galaxy should extend its sensitivity light the GeV mass range exploit directional information DM particle motion (Vahsen et al. CYGNUS: feasibility a nuclear recoil observatory with neutrinos, arXiv:2008.12587 , 2020). Cygno project studying gaseous time projection chamber operated at atmospheric pressure Gas Electron Multiplier (Sauli Nucl Instrum Meth A 386:531,...