F. Curciarello
A5079020989- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Nuclear physics research studies
- Atomic and Molecular Physics
- Cosmology and Gravitation Theories
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Computational Physics and Python Applications
- Nuclear Physics and Applications
- Neutrino Physics Research
- Radiation Detection and Scintillator Technologies
- Cold Fusion and Nuclear Reactions
- Astrophysics and Cosmic Phenomena
- Advanced Chemical Physics Studies
- Astronomical and nuclear sciences
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Paranormal Experiences and Beliefs
- Advanced NMR Techniques and Applications
- Noncommutative and Quantum Gravity Theories
- Advanced Optical Sensing Technologies
- Quantum, superfluid, helium dynamics
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2017-2024
Istituto Nazionale di Fisica Nucleare
2014-2024
Frascati Scienza
2024
University of Calabria
2023
University of Catania
2020
University of Messina
2011-2017
Novosibirsk State University
2015-2017
National Centre for Nuclear Research
2017
Istituto Nazionale di Fisica Nucleare, Sezione di Catania
2011-2016
We review the present status of Standard Model calculation anomalous magnetic moment muon. This is performed in a perturbative expansion fine-structure constant $\alpha$ and broken down into pure QED, electroweak, hadronic contributions. The QED contribution by far largest has been evaluated up to including $\mathcal{O}(\alpha^5)$ with negligible numerical uncertainty. electroweak suppressed $(m_\mu/M_W)^2$ only shows at level seventh significant digit. It two loops known better than one...
Dark sectors, consisting of new, light, weakly-coupled particles that do not interact with the known strong, weak, or electromagnetic forces, are a particularly compelling possibility for new physics. Nature may contain numerous dark each their own beautiful structure, distinct particles, and forces. This review summarizes physics motivation sectors exciting opportunities experimental exploration. It is summary Intensity Frontier subgroup "New, Light, Weakly-coupled Particles" Community...
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...
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.
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...
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.
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.
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...
The $ \Sigma$ beam asymmetry in \eta^{\prime}$ photoproduction off the proton was measured at GrAAL polarised photon with incoming energies of 1.461 and 1.480 GeV. For both as a function meson production angle shows clear structure, more pronounced lowest one, change sign around 90^{\circ}$ . observed behaviour is compatible P-wave D-wave (or S-wave F-wave) interference, closer to threshold stronger. results are compared existing state-of-the-art calculations that fail account for data.
e+e− collider experiments at the intensity frontier are naturally suited to probe existence of a force beyond Standard Model between WIMPs, most viable dark matter candidates. The mediator this new force, known as photon, should be vector gauge boson very weakly coupled photon. No significant signal has been observed so far. I will report on current limits set coupling factor ε2 photon and by experiments.
A bstract Using 1.63 fb −1 of integrated luminosity collected by the KLOE experiment about 7 × 10 4 K S → π ± e ∓ ν decays have been reconstructed. The measured value charge asymmetry for this decay is = (−4.9 5.7 stat 2.6 syst ) −3 , which almost twice more precise than previous result. combination these two measurements gives (−3.8 5.0 and, together with L semileptonic decay, provides significant tests CPT symmetry. obtained results are in agreement invariance.
The three precision measurements of the cross section $σ\big(e^+e^-\rightarrowπ^+π^-γ(γ)\big)$ 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...
Based on a sample of 300 million $K_S$ mesons produced in $\phi \to K_L K_S$ decays recorded by the KLOE experiment at DA$\Phi$NE $e^+e^-$ collider we have measured branching fraction for decay $K_S \pi \mu \nu$. The are identified interaction $K_L$ detector. \nu$ selected boosted decision tree built with kinematic variables and time-of-flight measurement. Signal efficiencies evaluated data control samples $K_L decays. A fit to reconstructed muon mass distribution finds $7223 \pm 180$ signal...
Some recent studies on the mechanisms of body image formation Shroud Turin showed several tentative explanations: (i) attempts to demonstrate that it is a forgery, (ii) experiments devoted explain by corona discharge or using UV radiation, and (iii) hypothesis was naturally produced stochastic process triggered an unknown energy source. In this paper, taking into account microscopic linen structure, we compare above with physical chemical characteristics image. The processing supports as...
The fusion excitation function is the important quantity in planning experiments for synthesis of superheavy elements. Its values seem to be determined by experimental study hindrance complete observation mass, angular and energy distributions fissionlike fragments. There ambiguity establishment reaction mechanism leading observed binary fragments can produced quasifission, fast fission, fusion-fission processes which have overlapping mass (angular, kinetic energy) branching ratio between...
The 3 H+ He cluster structure in 6 Li was investigated by the H(α, H He)n kinematically complete experiment at incident energy E α = 67.2 MeV. We have observed two resonances x * 21.30 and 21.90 MeV, which are consistent with results of He( H, γ) analysis Ajzenberg-Selove compilation. Our data compared previous experimental RGM CSRGM calculations.