A5070362035- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- Radiation Detection and Scintillator Technologies
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Muon and positron interactions and applications
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- Radiation Therapy and Dosimetry
- Medical Imaging Techniques and Applications
- Astrophysics and Cosmic Phenomena
- Radiation Effects in Electronics
- Particle accelerators and beam dynamics
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- International Science and Diplomacy
- Computational Physics and Python Applications
- Quantum, superfluid, helium dynamics
- Luminescence Properties of Advanced Materials
- Photocathodes and Microchannel Plates
- Advanced NMR Techniques and Applications
- Radioactive Decay and Measurement Techniques
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2015-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
2017-2024
Istituto Nazionale di Fisica Nucleare
2018-2024
Frascati Scienza
2022-2024
Fondazione Stella Maris
2024
Sapienza University of Rome
2011-2023
University of Rome Tor Vergata
2022-2023
Universitat Autònoma de Barcelona
2023
Istituto Nazionale di Fisica Nucleare, Sezione di Lecce
2021-2022
Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara
2022
The existence of a light dark force mediator has been tested with the KLOE detector at DAPHNE. This particle, called U, is searched for using decay chain phi-->etaU, eta-->pi+pi-pi0, U-->e+e-. No evidence found in 1.5 fb-1 data. resulting exclusion plot covers mass range 5
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...
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.
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...
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 =...
Abstract True muonium (TM) ( μ + − ) is the heaviest and smallest bound state not containing hadrons, after TM τ mu-tauonium ± ∓ ). One of proposed methods to observe spin 1 fundamental TM, which has lifetime among states, was build an e collider with a large crossing angle θ ∼ 30°) in order provide boost detect its decay vertex . The following paper will instead show that excited states can be observed relatively quantities <?CDATA ${ \mathcal O }$?> <mml:math...
The Crilin calorimeter is a semi-homogeneous calorimetric system that uses Lead Fluoride (PbF 2 ) crystals with UV-extended Silicon Photomultipliers (SiPMs). Proposed for the Muon Collider, it requires high granularity to distinguish signal particles and address substructures jet identification. Anticipating substantial occupancy due beam-induced backgrounds, simulations indicate photon flux an average energy of 1.7 MeV approximately 4.5 MHz/cm fluence rate. Prioritizing time-of-arrival...
Using 1.6 fb−1 of e + − → ϕ ηγ data collected with the KLOE detector at DAΦNE, Dalitz plot distribution for η π 0 decay is studied world's largest sample ∼ 4.7 · 106 events. The density parametrized as a polynomial expansion up to cubic terms in normalized dimensionless variables X and Y . experiment sensitive all charge conjugation conserving expansion, including gX 2 term. statistical uncertainty parameters improved by factor two respect earlier measurements.
A measurement of the vector to pseudoscalar conversion decay $\phi \to \pi^0 e^+e^-$ with KLOE experiment is presented. sample $\sim 9500$ signal events was selected from a data set 1.7 fb$^{-1}$ $e^+e^-$ collisions at $\sqrt{s} \sim m_{\phi}$ collected DA$\Phi$NE collider. These were used obtain first transition form factor $| F_{\phi \pi^0}(q^2) |$ and new branching ratio decay: $\rm{BR}\,(\phi e^+e^-) = (\,1.35 \pm 0.05^{\,\,+0.05}_{\,\,-0.10}\,) \times 10 ^{-5}$. The result improves...
We have studied the vector to pseudoscalar conversion decay ϕ→ηe+e−, with η→π0π0π0, KLOE detector at DAΦNE. The data set of 1.7 fb−1 e+e− collisions s∼Mϕ contains a clear signal ∼31,000 events from which we measured value BR(ϕ→ηe+e−)=(1.075±0.007±0.038)×10−4. same sample is used determine transition form factor by fit invariant mass spectrum, obtaining bϕη=(1.28±0.10−0.08+0.09) GeV−2, that improves five precision previous measurement and in good agreement VMD expectations.
Abstract The measurement of physics processes at new energy frontier experiments requires excellent spatial, time, and resolutions to resolve the structure collimated high-energy jets. In a future Muon Collider, beam-induced backgrounds (BIB) represent main challenge in design detectors event reconstruction algorithms. technology calorimeters should be chosen reduce effect BIB, while keeping good performance. Several requirements can inferred: i) high granularity overlap BIB particles same...
We searched for evidence of a Higgsstrahlung process in secluded sector, leading to final state with dark photon U and Higgs boson h', the KLOE detector at DAFNE. investigated case h' lighter than U, decaying into muon pair producing missing energy signature. found no set upper limits its parameters range 2m_mu<m_U<1000 MeV, m_h'<m_U.
The absolute branching ratio of the K+→π+π−π+(γ) decay, inclusive final-state radiation, has been measured using ∼17 million tagged K+ mesons collected with KLOE detector at DAΦNE, Frascati ϕ-factory. result is:BR(K+→π+π−π+(γ))=0.05565±0.00031stat±0.00025syst a factor ≃ 5 more precise respect to previous result. This work completes program precision measurements dominant kaon ratios KLOE.
We have carried out a new direct search for the CP violating decay KS -> 3pi0 with 1.7 fb^-1 of e+e- collisions collected by KLOE detector at phi-factory DAFNE. searched this in sample about 5.9 x 10^8 KL events tagging means interaction calorimeter and requiring six prompt photons. With respect to our previous search, analysis has been improved increasing factor four tagged more effective background rejection fake tags spurious clusters. find no candidates data simulated samples, while...
We have measured the running of effective QED coupling constant $\alpha(s)$ in time-like region $0.6<\sqrt s< 0.975$ GeV with KLOE detector at DA$\Phi$NE using Initial State Radiation process $e^+e^-\to\mu^+ \mu^-\gamma$. It represents first measurement this energy region. Our results show a more than 5$\sigma$ significance hadronic contribution to $\alpha(s)$, which is strongest direct evidence both time- and space-like regions achieved single measurement. By $e^+e^-\to\pi^+\pi^-$ cross...
Crilin (Crystal Calorimeter with Longitudinal Information) is a semi-homogeneous, longitudinally segmented electromagnetic calorimeter based on high- Z , ultra-fast crystals UV-extended SiPM readout. The design has been proposed as candidate solution for both future Muon Collider barrel ECAL and the Small Angle of HIKE experiment. As part development program, we have carried out beam tests small (10 × 10 40 mm 3 ) lead fluoride (PbF 2 tungstate (PbWO 4 PWO-UF) 120 GeV electrons at CERN SPS...
We present a measurement of {\eta} meson production in photon-photon interactions produced by electron-positron beams colliding with \sqrt{s}=1 GeV. The is done the KLOE detector at \phi-factory DA{\Phi}NE an integrated luminosity 0.24 fb^{-1}. e^+e^- --> e^+e^-{\eta} cross section measured without detecting outgoing electron and positron, selecting decays {\eta}-->{\pi}^+{\pi}^-{\pi}^0 {\eta}-->{\pi}^0{\pi}^0{\pi}^0. most relevant background due to {\eta}{\gamma} when monochromatic photon...