L. Pasqualini
A5070741649- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Nuclear physics research studies
- Particle accelerators and beam dynamics
- Muon and positron interactions and applications
- Atomic and Molecular Physics
- Radiation Therapy and Dosimetry
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- High-Energy Particle Collisions Research
- Graphite, nuclear technology, radiation studies
- Electron and X-Ray Spectroscopy Techniques
- Nuclear reactor physics and engineering
- Inorganic Fluorides and Related Compounds
- Radiopharmaceutical Chemistry and Applications
- Quantum, superfluid, helium dynamics
- Superconducting Materials and Applications
- Quantum Chromodynamics and Particle Interactions
- Boron Compounds in Chemistry
- Optical and Acousto-Optic Technologies
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2016-2025
University of Bologna
2016-2025
Istituto Nazionale di Fisica Nucleare
1965-2025
Osservatorio astronomico di Bologna
2014-2024
Centre National d'Études Spatiales
2022
European Organization for Nuclear Research
2020
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2020
Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca
2020
University of Milano-Bicocca
2019
Opera Software (Ireland)
2019
The OPERA experiment was designed to search for $\nu_{\mu} \rightarrow \nu_{\tau}$ oscillations in appearance mode, i.e. by detecting the $\tau$-leptons produced charged current $\nu_{\tau}$ interactions. took data from 2008 2012 CERN Neutrinos Gran Sasso beam. observation of appearance, achieved with four candidate events a sub-sample data, previously reported. In this paper, fifth event, found an enlarged sample, is described. Together further reduction expected background, detected so far...
The OPERA experiment was designed to study ν_{μ}→ν_{τ} oscillations in the appearance mode CERN Gran Sasso Neutrino beam (CNGS). In this Letter, we report final analysis of full data sample collected between 2008 and 2012, corresponding 17.97×10^{19} protons on target. Selection criteria looser than previous analyses have produced ten ν_{τ} candidate events, thus reducing statistical uncertainty measurement oscillation parameters properties. A multivariate approach for event identification...
MoEDAL is designed to identify new physics in the form of long-lived highly ionizing particles produced high-energy LHC collisions. Its arrays plastic nuclear-track detectors and aluminium trapping volumes provide two independent passive detection techniques. We present here results a first search for magnetic monopole production 13 TeV proton-proton collisions using technique, extending previous publication with 8 data during Run 1. A total 222 kg detector samples was exposed forward region...
The MoEDAL experiment is designed to search for magnetic monopoles and other highly-ionising particles produced in high-energy collisions at the LHC. largely passive detector, deployed Interaction Point 8 on LHC ring, relies two dedicated direct detection techniques. first technique based stacks of nucleartrack detectors with surface area ~18m2, sensitive particle ionisation exceeding a high threshold. These are analysed offline by optical scanning microscopes. second trapping charged an...
The OPERA experiment is searching for nu_mu -> nu_tau oscillations in appearance mode i.e. via the direct detection of tau leptons charged current interactions. evidence has been previously reported with three candidate events using a sub-sample data from 2008-2012 runs. We report here fourth event, decaying into hadron, found after adding 2012 run without any muon final state to sample. Given number analysed and low background, are established significance 4.2sigma.
Abstract The Deep Underground Neutrino Experiment (DUNE) is a next generation experiment aimed to study neutrino oscillation. Its long-baseline configuration will exploit Near Detector (ND) and Far (FD) located at distance of ∼1300 km. FD consist four Liquid Argon Time Projection Chamber (LAr TPC) modules. A Photon Detection System (PDS) be used detect the scintillation light produced inside detector after interactions. PDS based on collectors coupled Silicon Photomultipliers (SiPMs)....
The OPERA experiment, designed to perform the first observation of $$\nu _\mu \rightarrow \nu _\tau $$ oscillations in appearance mode through detection $$\tau leptons produced charged current interactions, has collected data from 2008 2012. In present paper, procedure developed detect particle decays, occurring over distances order $$1~\mathrm{mm}$$ neutrino interaction point, is described detail and applied search for charmed hadrons, showing similar decay topologies as lepton. analysed...
The OPERA detector, designed to search for $$\nu _{\mu } \rightarrow \nu _{\tau }$$ oscillations in the CNGS beam, is located underground Gran Sasso laboratory, a privileged location study TeV-scale cosmic rays. For analysis here presented, detector was used measure atmospheric muon charge ratio TeV region. collected charge-separated ray data between 2008 and 2012. More than 3 million events were detected reconstructed, among which about 110000 multiple bundles. $$R_{\mu \equiv N_{\mu...
Effective longitudinal segmentation of shashlik calorimeters can be achieved taking advantage the compactness and reliability silicon photomultipliers. These photosensors embedded in bulk calorimeter are employed to design very compact modules that sample electromagnetic hadronic showers every few radiation lengths. In this paper, we discuss performance a made up 12 such able $\sim 4X_{0}$ . summer 2016, prototype has been exposed electrons, muons, hadrons at CERN PS (East Area T9 beamline)....
A bstract The OPERA experiment has discovered the tau neutrino appearance in CNGS muon beam, agreement with 3 flavour oscillation hypothesis. interaction target, made of Emulsion Cloud Chambers, was particularly efficient reconstruction electromagnetic showers. Moreover, thanks to very high granularity emulsion films, showers induced by electrons can be distinguished from those π 0 s, thus allowing detection charged current interactions electron neutrinos. In this paper results search for...
The Euclid mission objective is to understand why the expansion of Universe accelerating through by mapping geometry dark investigating distance-redshift relationship and tracing evolution cosmic structures. project part ESA's Cosmic Vision program with its launch planned for 2020 (ref [1]). NISP (Near Infrared Spectrometer Photometer) one two instruments operating in near-IR spectral region (900- 2000nm) as a photometer spectrometer. instrument composed of: - cold (135K) optomechanical...
The OPERA experiment has conclusively observed the appearance of tau neutrinos in muon neutrino CNGS beam. Exploiting detector capabilities, it was possible to isolate high purity samples $\nu_{e}$, $\nu_{\mu}$ and $\nu_{\tau}$ charged current weak interactions, as well neutral interactions. In this Letter, full dataset is used for first time test three-flavor oscillation model derive constraints on existence a light sterile within framework $3+1$ model. For time, electron channels are...
Silicon Photomultipliers with cell-pitch ranging from 12 μm to 20 were tested against neutron irradiation at moderate fluences study their performance for calorimetric applications. The photosensors developed by FBK employing the RGB-HD technology. We performed tests up 2 × 1011 n/cm2 (1 MeV eq.) INFN-LNL Irradiation Test facility. SiPMs characterized on-site (dark current and photoelectron response) during after irradiations different fluences. irradiated installed in ENUBET compact modules...
Abstract The ENUBET project is aimed at designing and experimentally demonstrating the concept of monitored neutrino beams. These novel beams are enhanced by an instrumented decay tunnel, whose detectors reconstruct large-angle charged leptons produced in tunnel give a direct estimate flux source. facilities thus ideal tool for high-precision cross-section measurements GeV scale because they offer superior control beam systematics with respect to existing facilities. In this paper, we...
An iron- plastic-scintillator shashlik calorimeter with a 4.3 X0 longitudinal segmentation was tested in November 2016 at the CERN East Area facility charged particles up to 5 GeV . The performance of this detector terms electron energy resolution, linearity, response muons and hadron showers are presented paper compared simulation. Such fine-grained is achieved using very compact light readout system developed by SCENTT ENUBET Collaborations, which based on fiber-SiPM coupling boards...
A prototype for the instrumented decay tunnel of ENUBET was tested in 2018 at CERN East Area facility with charged particles up to 5 GeV. This detector is a longitudinal sampling calorimeter lateral scintillation light readout. The equipped by an additional "$t_0$-layer" timing and photon discrimination. performance this terms electron energy resolution, linearity, response muons hadron showers are presented paper compared simulation. $t_0$-layer studied both standalone mode using pion...
We present the first application of polysiloxane-based scintillators as active medium in a shashlik sampling calorimeter. These results were obtained from testbeam campaign $\sim$6$\times$6$\times$45 cm$^3$ (13 $X_0$ depth) prototype. A Wavelength Shifting fiber array 36 elements runs perpendicularly to stack iron (15 mm) and polysiloxane scintillator tiles with density about one over cm$^2$. Unlike calorimeters based on plastic organic scintillators, here fibers are optically matched...
The OPERA experiment was designed to search for $$\nu _{\mu } \rightarrow \nu _{\tau }$$ oscillations in appearance mode through the direct observation of tau neutrinos CNGS neutrino beam. In this paper, we report a study multiplicity charged particles produced charged-current interactions lead. We present hadron average multiplicities, their dispersion and investigate KNO scaling different kinematical regions. results are presented detail form tables that can be used validation Monte Carlo...