A. De Santis
A5029368347- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Noncommutative and Quantum Gravity Theories
- Particle Accelerators and Free-Electron Lasers
- Computational Physics and Python Applications
- Particle Detector Development and Performance
- Particle accelerators and beam dynamics
- Atomic and Subatomic Physics Research
- Glioma Diagnosis and Treatment
- Superconducting Materials and Applications
- Distributed and Parallel Computing Systems
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Vascular Malformations Diagnosis and Treatment
- Traumatic Brain Injury and Neurovascular Disturbances
- Pharmacological Effects and Toxicity Studies
- Radiation Detection and Scintillator Technologies
- Liver Disease Diagnosis and Treatment
- Geophysics and Gravity Measurements
- Motor Control and Adaptation
- Epilepsy research and treatment
- Spinal Hematomas and Complications
Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo
2022-2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2007-2024
Universidade de São Paulo
2022
Phoenix Scientific Industries (United Kingdom)
2020
Istituto Ortopedico Galeazzi
2007-2019
Istituti di Ricovero e Cura a Carattere Scientifico
2000-2017
Policlinico Umberto I
2016
Istituto Nazionale di Fisica Nucleare
2016
Sapienza University of Rome
2005-2015
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2006-2015
We have measured the cross section of radiative process e+e- -> pi+pi-gamma with KLOE detector at Frascati phi-factory DAPHNE, from events taken a CM energy W=1 GeV. Initial state radiation allows us to obtain for pi+pi-, pion form factor |F_pi|^2 and dipion contribution muon magnetic moment anomaly, Delta a_mu^{pipi} = (478.5+-2.0_{stat}+-5.0_{syst}+-4.5_{th}) x 10^{-10} in range 0.1 < M_{pipi}^2 0.85 GeV^2, where theoretical error includes SU(3) ChPT estimate uncertainty on photon final...
Object Surgical decompression is the recommended treatment in patients with moderate to severe degenerative lumbar spinal stenosis (DLSS) whom symptoms do not respond conservative therapy. Multilevel disease, poor patient health, and advanced age are generally considered predictors of a outcome after surgery, essentially because surgical technique that has always been invasive prone causing postoperative instability. The authors present minimally performed using unilateral approach for...
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 =...
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...
Summary: Purpose: To determine the potential effectiveness of phenytoin (PHT) in preventing early postoperative seizures patients undergoing craniotomy for supratentorial brain tumors. Methods: Two hundred requiring elective tumors were randomized to two groups equal size, with a prospective, open‐label, controlled design. One group received PHT (18 mg/kg as an intravenous intraoperative load, followed by additional daily doses aimed at maintaining serum concentrations within 10‐ 20‐æg/ml...
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.
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.
We searched for the $μ^+μ^-$ decay of a light vector gauge boson, also known as dark photon, in $e^+ e^- \to μ^+ μ^- γ_{\rm ISR}$ process by means Initial State Radiation (ISR) method. used 1.93~fb$^{-1}$ data collected KLOE experiment at DA$Φ$NE $ϕ$-factory. No structures have been observed over irreducible $μ^+ μ^-$ background. A 90\% CL limit on ratio $\varepsilon^2=α^{\prime}/α$ between coupling constant and fine structure $ 3\times 10^{-6}-2\times 10^{-7}$ has set photon mass region 519...