M. Martini
A5046765011- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Particle Accelerators and Free-Electron Lasers
- Seismic Waves and Analysis
- Muon and positron interactions and applications
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- earthquake and tectonic studies
- Particle accelerators and beam dynamics
- Seismology and Earthquake Studies
- Nuclear Physics and Applications
- Earthquake Detection and Analysis
- Computational Physics and Python Applications
- Nuclear physics research studies
- Seismic Imaging and Inversion Techniques
- Black Holes and Theoretical Physics
- Nuclear reactor physics and engineering
- Astrophysics and Cosmic Phenomena
- High-pressure geophysics and materials
- Medical Imaging Techniques and Applications
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2015-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara
2006-2024
Marconi University
2014-2023
Istituto Nazionale di Fisica Nucleare, Sezione di Catania
2016-2023
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
2016-2022
Istituto Nazionale di Fisica Nucleare, Sezione di Lecce
2021-2022
Polytechnic University of Turin
2022
Cornell University
2022
Sapienza University of Rome
2008-2022
University of Rome Tor Vergata
2016-2022
A sample of 1.69×107 fully reconstructed π0→γe+e− decay candidates collected by the NA48/2 experiment at CERN in 2003–2004 is analyzed to search for dark photon (A′) production π0→γA′ followed prompt A′→e+e− decay. No signal observed, and an exclusion region plane mass mA′ mixing parameter ε2 established. The obtained upper limits on are more stringent than previous range 9MeV/c2<mA′<70MeV/c2. sensitivity K±→π±A′ also evaluated.
The direct CP violation parameter Re(epsilon'/epsilon) has been measured from the decay rates of neutral kaons into two pions using NA48 detector at CERN SPS. 2001 running period was devoted to collecting additional data under varied conditions compared earlier years (1997-99). new yield result: = (13.7 +/- 3.1) times 10^{-4}. Combining this result with that published 1997, 98 and 99 data, an overall value (14.7 2.2) 10^{-4} is obtained experiment.
[1] We have analyzed a multiparametric data set of seismological, geodetic and geochemical recorded at Campi Flegrei caldera since 1982. We focus here on the period 1989–2010 that followed last bradyseismic crisis 1982–1984. Since then, there been least five repeated minor episodes ground uplift accompanied by seismicity. reanalyzed old paper digital seismic sets dating back to The recordings show evidence long-period events in January 1982 March 1989, we digitized some these significant...
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...
We present a new strategy for reliable automatic classification of local seismic signals and volcano-tectonic earthquakes (vt). The method is based on supervised neural network in which approach feature extraction from short period applied. To reduce the number records required analysis we set up specialized classifier, able to distinguish two classes signals, each selected stations. architecture multilayer perceptron (mlp) with single hidden layer. Spectral features parameterized attributes...
We have performed a search for the 1P1 state of charmonium resonantly formed in p¯p annihilations, close to center gravity 3PJ states. report results from study J/ψ+π0 and J/ψ+2π final observed statistically significant enhancement p¯+p→J/ψ+π0 cross section at √s ≃3526.2 MeV. This has characteristics narrow resonance mass, total width, production consistent with what is expected state. In our we found no candidates reactions p¯+p→J/ψ+π0+π0 p¯+p→J/ψ+π++π−.Received 10 July...
Cross sections for the reaction pp¯→e+e− have been measured at s=8.9,12.4, and 13.0 GeV2. The cross analyzed to obtain proton electromagnetic form factors in timelike region. We find that GM(q2)∝q−4α2s(q2) q2≥5 (GeV/c)2.Received 30 September 1992DOI:https://doi.org/10.1103/PhysRevLett.70.1212©1993 American Physical Society
We report the results from a study of ~23 Million K+- ==> pi+- pizero decays recorded by NA48/2 experiment at CERN SPS, showing an anomaly in invariant mass distribution region around 2m+, where m+ is charged pion mass. This anomaly, never observed previous experiments, can be interpreted as effect due mainly to final state charge exchange scattering process pi+ pi- decay. It provides precise determination a0 - a2, difference between pi-pi lengths isospin I=0 and I=2 states.
We report results from the analysis of $\mbox {$\mathrm {K}^{\pm}$}\rightarrow \pi^{+} \pi^{-} \mathrm{e}^{\pm} \nu$ ( {K}_{\mathrm {e}4}$}$ ) decay by NA48/2 collaboration at CERN SPS, based on total statistics 1.13 million decays collected in 2003–2004. The hadronic form factors S- and P-wave their variation with energy are obtained. phase difference between states ππ system is accurately measured allows a precise determination {$a_{0}^{0}$}$ {$a_{0}^{2}$}$ , I = 0 2 S-wave scattering...
We report results from a new measurement of the Ke4 decay K±→π+π-e±ν by NA48/2 collaboration at CERN SPS, based on partial sample more than 670 000 decays in both charged modes collected 2003. The form factors hadronic current (F,G,H) and ππ phase difference (δ=δs-δp) have been measured ten independent bins mass spectrum to investigate their variation. A sizeable acceptance large mass, low background very good resolution contribute an improved experimental accuracy, factor two better...
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...
We report the measurement of K− absorption processes in Σ0p final state and first exclusive two nucleon (2NA) with KLOE detector. The 2NA process without further interactions is found to be 9% sum all other contributing processes, including on three more nucleons or followed by residual nucleons. also determine possible contribution ppK− bound state. yield ppK−/Kstop− (0.044±0.009stat−0.005+0.004syst)⋅10−2 but its statistical significance based an F-test only 1σ.