P. Pedroni
A5031849791- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Nuclear physics research studies
- High-Energy Particle Collisions Research
- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Advanced NMR Techniques and Applications
- Dark Matter and Cosmic Phenomena
- Superconducting Materials and Applications
- Advanced Statistical Methods and Models
- Urban Planning and Valuation
- Neural Networks and Applications
- Quantum, superfluid, helium dynamics
- Simulation Techniques and Applications
- Atomic and Molecular Physics
- Cardiac Imaging and Diagnostics
- Medical Imaging Techniques and Applications
- Forecasting Techniques and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Radiation Therapy and Dosimetry
- Acute Myocardial Infarction Research
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Nuclear reactor physics and engineering
- Cardiac electrophysiology and arrhythmias
Istituto Nazionale di Fisica Nucleare, Sezione di Pavia
2015-2024
Istituti Ospitalieri di Cremona
2014-2024
Johannes Gutenberg University Mainz
2017-2023
University of Pavia
1989-2022
Institute for Nuclear Research
2022
Russian Academy of Sciences
2022
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2022
University of Bonn
2021
Istituto Nazionale di Fisica Nucleare
1994-2021
Petersburg Nuclear Physics Institute
2020
Information on the size and shape of neutron skin (208)Pb is extracted from coherent pion photoproduction cross sections measured using Crystal Ball detector together with Glasgow tagger at MAMI electron beam facility. On exploitation an interpolated fit a theoretical model to sections, half-height radius diffuseness distribution are found be c(n)=6.70±0.03(stat.) fm a(n)=0.55±0.01(stat.)(-0.03)(+0.02)(sys.) fm, respectively, corresponding thickness...
The small electric quadrupole $E2$ amplitude of the predominantly magnetic dipole $M1$ $p\ensuremath{\rightarrow}\ensuremath{\Delta}(1232)$ transition has been measured using 270 to 420 MeV tagged linearly polarized photons in $p(\stackrel{\ensuremath{\rightarrow}}{\ensuremath{\gamma}},p){\ensuremath{\pi}}^{o}$ reaction at Mainz Microtron MAMI. Differential cross sections and photon asymmetries were determined by measuring recoil proton cylindrically symmetric $4\ensuremath{\pi}$ detector...
A direct measurement of the helicity dependence total photoabsorption cross section on proton was carried out at MAMI (Mainz) in energy range 200<Eγ<800MeV. The experiment used a 4π detection system, circularly polarized tagged photon beam, and frozen spin target. contributions to Gerasimov-Drell-Hearn sum rule forward polarizability γ0 determined from data are 226±5(stat)±12(syst)μb −187±8(stat)±10(syst)×10−6fm4, respectively, for 200<Eγ<800MeV.Received 13 March...
The gp-->etap reaction has been measured with the Crystal Ball and TAPS multiphoton spectrometers in energy range from production threshold of 707 MeV to 1.4 GeV (1.49 =< W >= 1.87 GeV). Bremsstrahlung photons produced by 1.5-GeV electron beam Mainz Microtron MAMI-C momentum analyzed Glasgow Tagging Spectrometer were used for eta-meson production. Our accumulation 3.8 x 10^6 gp-->etap-->3pi0p-->6gp events allows a detailed study dynamics. differential cross sections determined 120 bins full...
Tagged linearly polarized photons have been used at the Mainz Microtron (MAMI) for simultaneous measurements of $p(\stackrel{\ensuremath{\rightarrow}}{\ensuremath{\gamma}},p){\ensuremath{\pi}}^{0}$ and $p(\stackrel{\ensuremath{\rightarrow}}{\ensuremath{\gamma}},{\ensuremath{\pi}}^{+})n$ reaction channels to study $\ensuremath{\gamma}\stackrel{\ensuremath{\rightarrow}}{N}\ensuremath{\Delta}(1232)$ transition. The energy dependence magnetic dipole ${M}_{1+}^{3/2}$ electric quadrupole...
The total photoabsorption cross sections for $^{1}\mathrm{H}$, $^{2}\mathrm{H}$, and $^{3}\mathrm{He}$ have been measured incident photon energies ranging from 200 to 800 MeV. data are the first this nucleus. By using large acceptance detector DAPHNE in conjunction with tagged beam facility of MAMI accelerator Mainz, high precision obtained. results show clearly changes nucleon resonances going $^{1}\mathrm{H}$ $^{3}\mathrm{He}$. In particular, ${\mathit{D}}_{13}$ region behavior is...
The dynamics of the $\eta\to 3\pi^0$ decay have been studied with Crystal Ball multiphoton spectrometer and TAPS calorimeter. Bremsstrahlung photons produced by 1.5-GeV electron beam Mainz microtron MAMI-C tagged Glasgow photon were used for $\eta$-meson production. analysis $3 \times 10^6$ $\gamma p \to \eta 3\pi^0 6\gamma p$ events yields value $\alpha=-0.032\pm0.003$ slope parameter, which agrees majority recent experimental results has smallest uncertainty. $\pi^0\pi^0$ invariant-mass...
Measurements of $γp \rightarrow K^{+} Λ$ and Σ^0$ cross-sections have been obtained with the photon tagging facility Crystal Ball calorimeter at MAMI-C. The measurement uses a novel $K^+$ meson identification technique in which weak decay products are characterized using energy timing characteristics deposit calorimeter, method that has potential to be applied many other facilities. fine center-of-mass ($W$) resolution statistical accuracy new data results significant impact on partial wave...
Differential and total cross sections for the quasifree reactions $\gamma p\rightarrow\eta p$ n\rightarrow\eta n$ have been determined at MAMI-C electron accelerator using a liquid deuterium target. Photons were produced via bremsstrahlung from 1.5 GeV incident beam energy-tagged with Glasgow photon tagger. Decay photons of neutral decay modes $\eta\rightarrow 2\gamma$ 3\pi^0 \rightarrow 6\gamma$ coincident recoil nucleons detected in combined setup Crystal Ball TAPS calorimeters. The...
An experimental study of $\omega$ photoproduction on the proton was conducted by using Crystal Ball and TAPS multiphoton spectrometers together with photon tagging facility at Mainz Microtron MAMI. The $\gamma p\to\omega p$ differential cross sections are measured from threshold to incident-photon energy $E_\gamma=1.40$ GeV ($W=1.87$ for center-of-mass energy) 15-MeV binning in $E_\gamma$ full production-angle coverage. quality present data near gives access a variety interesting physics...
The reactions γp→ηp and γp→η^{'}p are measured from their thresholds up to the center-of-mass energy W=1.96 GeV with tagged-photon facilities at Mainz Microtron, MAMI. Differential cross sections obtained unprecedented statistical accuracy, providing fine binning full production-angle coverage. A strong cusp is observed in total section for η photoproduction energies vicinity of η^{'} threshold, W=1896 MeV (E_{γ}=1447 MeV). Within framework a revised ηMAID isobar model, cusp, connection...
The BGOOD photoproduction experiment accesses forward meson angles and low momentum exchange kinematics in the $uds$ sector, which may be sensitive to molecular-like hadron structure. Our results strangeness sector suggest a dominant role of meson-baryon dynamics. This includes structures $K^0\Sigma^0$, $K^+\Sigma^0$ $K^+\Sigma^0(1385)$ residing at $\Sigma^{(*)}K^{(*)}$ thresholds have an equivalence $P_C$ states $\Sigma_C^{(*)}\bar D^{(*)}$ thresholds. In non-strange baryon-baryon...
The helicity dependence of the single pion photoproduction on proton has been measured in energy range from 200 to 450 MeV for first time. experiment, performed at Mainz microtron MAMI, used a 4π-detector system, circularly polarized, tagged photon beam, and frozen-spin target. data obtained provide new information multipole analyses determine main contributions Gerasimov-Drell-Hearn sum rule forward spin polarizability γ0.Received 6 January...
To verify the fundamental Gerasimov-Drell-Hearn (GDH) sum rule for first time experimentally, we measured helicity dependent total photoabsorption cross section with circularly polarized real photons and longitudinally nucleons in photon energy range 0.68-1.82 GeV tagged facility at ELSA. The experiment was carried out a 4pi detection system, beam, frozen spin proton target. contribution to GDH this is [49.9+/-2.4(stat)+/-2.2(syst)] microb.
The photoproduction of η mesons off nucleons bound in 2H and 3He has been measured coincidence with recoil protons neutrons for incident photon energies from threshold up to 1.4 GeV. experiments were performed at the Mainz MAMI accelerator, using Glasgow tagged facility. Decay photons η→2γ η→3π0 decays detected an almost 4π electromagnetic calorimeter combining Crystal Ball TAPS detectors. data both targets are excellent statistical quality show a narrow structure excitation function γn→nη....
The Dalitz decay $\ensuremath{\eta}\ensuremath{\rightarrow}{e}^{+}{e}^{\ensuremath{-}}\ensuremath{\gamma}$ has been measured in the $\ensuremath{\gamma}p\ensuremath{\rightarrow}\ensuremath{\eta}p$ reaction with Crystal Ball and TAPS multiphoton spectrometers, together photon-tagging facility at Mainz Microtron MAMI. experimental statistic used this work is one order of magnitude greater than any previous measurement...
The Dalitz decays eta -> e^+e^-g and omega pi^0 e^+e^- have been measured in the g p reactions, respectively, with A2 tagged-photon facility at Mainz Microtron, MAMI. value obtained for slope parameter of electromagnetic transition form factor eta, Lambda^{-2}_eta=(1.97+/-0.11_tot) GeV^{-2}, is good agreement previous measurements mu^+mu^-g decays. uncertainty Lambda^{-2}_eta lower than results based on decay. parameter, Lambda^{-2}_omega_pi^0 = (1.99+/-0.21_tot) somewhat mu^+mu^-, but are...
The spin polarizabilities of the nucleon describe how responds to an incident polarized photon. most model-independent way extract is through Compton scattering. Double-polarized scattering asymmetries on proton were measured in $\mathrm{\ensuremath{\Delta}}(1232)$ region using circularly photons and a transversely target at Mainz Microtron. Fits asymmetry data performed dispersion model calculation baryon chiral perturbation theory calculation, separation all four multipole basis was...
Differential cross sections for the gamma p -> pi^0 reaction have been measured with A2 tagged-photon facilities at Mainz Microtron, MAMI C, up to center-of-mass energy W=1.9 GeV. The new results, obtained a fine and angular binning, increase existing quantity of photoproduction data by ~47%. Owing unprecedented statistical accuracy full coverage, results are sensitive high partial-wave amplitudes. This is demonstrated decomposition differential in terms Legendre polynomials further...