L. Tortora

ORCID: 0000-0002-9802-0813
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About
Contact & Profiles
Research Areas
  • Particle physics theoretical and experimental studies
  • Quantum Chromodynamics and Particle Interactions
  • High-Energy Particle Collisions Research
  • Neutrino Physics Research
  • Dark Matter and Cosmic Phenomena
  • Muon and positron interactions and applications
  • Particle Detector Development and Performance
  • Astrophysics and Cosmic Phenomena
  • Particle accelerators and beam dynamics
  • Atomic and Molecular Physics
  • Black Holes and Theoretical Physics
  • Radiation Detection and Scintillator Technologies
  • Computational Physics and Python Applications
  • Superconducting Materials and Applications
  • Particle Accelerators and Free-Electron Lasers
  • Atomic and Subatomic Physics Research
  • Nuclear physics research studies
  • Nuclear Physics and Applications
  • Cosmology and Gravitation Theories
  • X-ray Spectroscopy and Fluorescence Analysis
  • Noncommutative and Quantum Gravity Theories
  • Medical Imaging Techniques and Applications
  • Solar and Space Plasma Dynamics
  • Analog and Mixed-Signal Circuit Design
  • Magnetic Field Sensors Techniques

Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre
2012-2024

Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2003-2024

Roma Tre University
2001-2023

Osaka University of Tourism
2023

Istituto Nazionale di Fisica Nucleare
1987-2022

University of Catania
2020

Istituto Nazionale di Fisica Nucleare, Sezione di Pavia
2018

Istituto Nazionale di Fisica Nucleare, Sezione di Catania
2018

Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2007-2016

Istituto Nazionale di Fisica Nucleare, Sezione di Bari
1995-2016

The existence of a new force beyond the Standard Model is compelling because it could explain several striking astrophysical observations which fail standard interpretations. We searched for light vector mediator this dark force, $\mathrm{U}$ boson, with KLOE detector at DA$\Phi$NE $\mathrm{e}^{+}\mathrm{e}^{-}$ collider. Using an integrated luminosity 1.54 fb$^{-1}$, we studied process $\mathrm{e}^{+}\mathrm{e}^{-} \to \mathrm{U}\gamma$, $\mathrm{U} \mathrm{e}^{+}\mathrm{e}^{-}$, using...

10.1016/j.physletb.2015.10.003 article EN cc-by Physics Letters B 2015-10-17

We have searched for a light vector boson U, the possible carrier of "dark force", with KLOE detector at DAΦNE e+e− collider, motivated by astrophysical evidence presence dark matter in Universe. Using collisions collected an integrated luminosity 239.3 pb−1, we look dimuon mass peak reaction e+e−→μ+μ−γ, corresponding to decay U→μ+μ−. find no U signal. set 90% CL upper limit mixing parameter squared between photon and 1.6×10−5 8.6×10−7 region 520<mU<980 MeV.

10.1016/j.physletb.2014.08.005 article EN cc-by Physics Letters B 2014-08-07

The recent interest in a light gauge boson the framework of an extra U(1) symmetry motivates searches mass range below 1 GeV. We present search for such particle, dark photon, e+e−→Uγ, U→π+π− based on 28 million e+e−→π+π−γ events collected at DAΦNE by KLOE experiment. π+ π− production initial-state radiation compensates loss sensitivity previous U→e+e−, μ+μ− due to small branching ratios ρ–ω resonance region. found no evidence signal and set limit 90% CL mixing strength between photon ε2, U...

10.1016/j.physletb.2016.04.019 article EN cc-by Physics Letters B 2016-04-11

Neutral kaon pairs produced in phi decays anti-symmetric entangled state can be exploited to search for violation of CPT symmetry and Lorentz invariance. We present an analysis the CP-violating process phi->K_S K_L->pi+pi-pi+pi- based on 1.7 fb-1 data collected by KLOE experiment at Frascati phi-factory DAFNE. The are used perform a measurement CPT-violating parameters Delta_amu neutral kaons contest Standard Model Extension framework. measured reference frame fixed stars are: Delta_ao =...

10.1016/j.physletb.2014.01.026 article EN cc-by Physics Letters B 2014-01-16

A bstract The three precision measurements of the cross section σ ( e + − → π γ(γ)) using initial state radiation by KLOE collaboration provide an important input for prediction hadronic contribution to anomalous magnetic moment muon. These are correlated both statistical and systematic uncertainties and, therefore, simultaneous use these requires covariance matrices that fully describe correlations. We present construction them determine a combined measurement γ(γ)). find, from this...

10.1007/jhep03(2018)173 article EN cc-by Journal of High Energy Physics 2018-03-01

The international Muon Ionization Cooling Experiment (MICE), which is under construction at the Rutherford Appleton Laboratory (RAL), will demonstrate principle of ionization cooling as a technique for reduction phase-space volume occupied by muon beam. channels are required Neutrino Factory and Collider. MICE evaluate in detail performance single lattice cell Feasibility Study 2 channel. Beam has been constructed ISIS synchrotron RAL, Step I, it characterized using beam-instrumentation...

10.1088/1748-0221/7/05/p05009 article EN Journal of Instrumentation 2012-05-23

Abstract The FAMU experiment aims to measure for the first time hyperfine splitting of muonic hydrogen ground state. From this measurement proton Zemach radius can be derived and will shed light on determination charge radius. In paper, we describe scientific goal, method detailed preparatory work. This includes outcome preliminary measurements, subsequent refined simulations evaluation expected results. experimental setup being built performed at RAL laboratory muon facility is also described.

10.1140/epja/s10050-020-00195-9 article EN cc-by The European Physical Journal A 2020-07-01

We have studied the phi->a_0(980) gamma process with KLOE detector at Frascati phi-factory DAPhNE by detecting phi->eta pi^0 decays in final states eta->gamma and eta->pi^+ pi^- pi^0. measured branching ratios for both states: Br(phi->eta gamma)=(7.01 +/- 0.10 0.20)x10^-5 (7.12 0.13 0.22)x10^-5 respectively. also extracted a_0(980) mass its couplings to eta pi^0, K^+ K^-, phi meson from fit of invariant distributions using different phenomenological models.

10.1016/j.physletb.2009.09.022 article EN cc-by Physics Letters B 2009-09-18
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