P. Bagnaia
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Neutrino Physics Research
- Cosmology and Gravitation Theories
- Distributed and Parallel Computing Systems
- Black Holes and Theoretical Physics
- Medical Imaging Techniques and Applications
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- Muon and positron interactions and applications
- advanced mathematical theories
- Superconducting Materials and Applications
- Advanced Data Storage Technologies
- Particle accelerators and beam dynamics
- Nuclear Physics and Applications
- Digital Radiography and Breast Imaging
- Structural Analysis of Composite Materials
- Quantum, superfluid, helium dynamics
- International Science and Diplomacy
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2016-2025
Sapienza University of Rome
2016-2025
Brandeis University
2023-2024
A. Alikhanyan National Laboratory
2024
Atlas Scientific (United States)
2024
The University of Adelaide
2016-2023
Harvard University
2023
TU Dortmund University
2020
University of Oxford
2019
Stockholm University
2019
A search for exotic unstable neutral and charged heavy leptons as well stable is performed with the L3 detector at LEP. Sequential, vector mirror natures of are considered. No evidence their existence found lower limits on masses set.
Single- and multi-photon events with missing energy are selected in 619/pb of data collected by the L3 detector at LEP centre-of-mass energies between 189GeV 209GeV. The cross sections process e^+e^- -> nu gamma (gamma) found to be agreement Standard Model expectations, number light neutrino species is determined, including lower data, N_nu = 2.98 +/- 0.05 0.04. Selection results also given form tables which can used test future models involving single- signatures LEP. These final states...
The absolute muon flux between 20 GeV and 3000 is measured with the L3 magnetic spectrometer for zenith angles ranging from 0 degree to 58 degree. Due large exposure of about 150 m2 sr d, excellent momentum resolution chambers, a precision 2.3 % at in vertical direction achieved. ratio positive negative muons studied 500 GeV, average charge found be 1.285 +- 0.003 (stat.) 0.019 (syst.).
Scalar partners of quarks and leptons, predicted in supersymmetric models, are searched for e^+e^- collisions at centre-of-mass energies between 192GeV 209GeV LEP. No evidence any such particle is found a data sample 450 pb^-1. Upper limits on their production cross sections set lower masses derived the framework Minimal Supersymmetric Standard Model.
We report on a search for the first generation heavy neutrino that is an isosinglet under standard SU(2)_L gauge group. The data collected with L3 detector at center-of-mass energies between 130 GeV and 208 are used.The decay channel N_e --> eW investigated no evidence found neutrino, N_e, in mass range 80 205 GeV. Upper limits mixing parameter light derived.
Single top production in e+e- annihilations is searched for data collected by the L3 detector at centre-of-mass energies from 189 to 209 GeV, corresponding a total integrated luminosity of 634 pb-1. Investigating hadronic and semileptonic decays, no evidence single LEP obtained upper limits on cross section as function energy are derived. Limits possible anomalous couplings, well scale contact interactions responsible determined.
Using a sample of e+e− annihilation events collected with the L3 detector at Z resonance corresponding to an integrated luminosity 137 pb−1, we have searched for anomalous production γX final states where X represents stable, weakly interacting particles and photon energy is greater than 15 GeV. The found consistent Standard Model expectations. Upper limits are set on Zγ couplings, τ neutrino magnetic moment, branching ratio → γX.
We analyse e+e−→ττγ events using 100pb−1 of data collected by the L3 experiment during 1991-1995 LEP runs at Z pole. From energy photons and their isolation from tau decay products, we determine anomalous magnetic electric dipole moments to be, respectively: aτ=0.004±0.027±0.023;dτ=(0.0±1.5±1.3)×10−16e·cm.This is a direct measurement these τ form factors q2=0.