G. Della Ricca
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Medical Imaging Techniques and Applications
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- Distributed and Parallel Computing Systems
- Nuclear physics research studies
- Advanced Data Storage Technologies
- CCD and CMOS Imaging Sensors
- Parallel Computing and Optimization Techniques
- Algorithms and Data Compression
- Nuclear Physics and Applications
- Stochastic processes and statistical mechanics
- Nuclear reactor physics and engineering
- Muon and positron interactions and applications
University of Trieste
2016-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2016-2025
Institute of High Energy Physics
2015-2024
University of Antwerp
2024
A. Alikhanyan National Laboratory
2022-2024
National and Kapodistrian University of Athens
2001-2016
Joint Institute for Nuclear Research
2014-2015
European Organization for Nuclear Research
1996-2014
Iowa State University
2001-2014
Kangwon National University
2012-2014
The nature of b-quark jet hadronisation has been investigated using data taken at the Z peak by DELPHI detector LEP. Two complementary methods are used to reconstruct energy weakly decaying b-hadrons, $E_{\mathrm{B}}^{\mathrm{weak}}$ . average value $x^{\mathrm{weak}}_{\mathrm{B}} = E_{\mathrm{B}}^{\mathrm{weak}}/E_{\mathrm{beam}}$ is measured be 0.699±0.011. resulting $x^{\mathrm{weak}}_{\mathrm{B}}$ distribution then analysed in framework two choices for perturbative contribution (parton...
The energy resolution of the barrel part CMS Electromagnetic Calorimeter has been studied using electrons 20 to 250 GeV in a test beam. incident electron's was reconstructed by summing measured arrays 3 × or 5 channels. There no significant amount correlated noise observed within these arrays. For at centre crystals, mean stochastic term be 2.8% and constant 0.3%. electrons' which is contained array depends on its position incidence. variation containment with corrected for distribution...
A search for pair-produced doubly charged Higgs bosons has been performed using the data collected by DELPHI detector at LEP centre-of-mass energies between 189 and 209 GeV. No excess is observed in with respect to Standard Model background. lower limit mass of 97.3 GeV/c2 95% confidence level set left–right symmetric models any value Yukawa coupling τ leptons.
Single photons detected by the DELPHI experiment at LEP2 in years 1997–2000 are reanalysed to investigate existence of a single extra dimension modified ADD scenario with slightly warped large dimensions. The data collected centre-of-mass energies between 180 and 209 GeV for an integrated luminosity ∼650 pb−1 agree predictions Standard Model allow limit be set on graviton emission one dimension. obtained fundamental mass scale M D is 1.69 TeV/c 2 95% CL, expected 1.71 2.
Calibration of the relative response individual channels barrel electromagnetic calorimeter CMS detector was accomplished, before installation, with cosmic ray muons and test beams. One fourth exposed to a beam high energy electrons calibration channels, intercalibration, found be reproducible precision about 0.3%. Additionally, data were collected rays for entire ECAL during commissioning phase. By comparing intercalibration constants obtained electron those from data, it is demonstrated...
A search for single top production (e+e−→tc̄) via flavour changing neutral currents (FCNC) was performed using the data taken by DELPHI detector at LEP2. The analyzed have been accumulated center-of-mass energies ranging from 189 to 208 GeV. Limits 95% confidence level were obtained on anomalous coupling parameters κγ and κZ.
A determination of the single W spin density matrix (SDM) elements in reaction e+e-→W+W-→lνqq̄(l=e/μ) is reported at centre-of-mass energies between 189 and 209 GeV. The data sample used corresponds to an integrated luminosity 520 pb-1 taken by DELPHI 1998 2000. SDM elements, ρττ' W± (τ,τ'=± 1 or 0), are determined as a function W- production angle with respect e- beam direction obtained from measurements decay products application suitable projection operators, Λττ', which assume V-A...
In the last two years CMS experiment has commissioned a full end to data quality monitoring system in tandem with progress detector commissioning. We present and certification systems place, from online taking delivering certified sets for physics analyses, release validation offline re-reconstruction activities at Tier-1s. discuss main results lessons learnt so far commissioning early operation. outline our practical operations arrangements key technical implementation aspects.
Inclusive J/psi production in photon-photon collisions has been observed at LEP II beam energies. A clear signal from the reaction gamma -> J/psi+X is seen. The number of N(J/psi mu+mu-) events 36 +/- 7 for an integrated luminosity 617 pb^{-1}, yielding a cross-section sigma(J/psi+X) = 45 9 (stat) 17 (syst) pb. Based on study event shapes different types processes PYTHIA program, we conclude that (74 22)% are due to `resolved' photons, dominant contribution which most probably gluon...
The data taken by DELPHI at centre-of-mass energies between 189 and 209 GeV are used to place limits on the CP-conserving trilinear gauge boson couplings Delta_g1z, lambda_gamma Delta_kappag associated W+W- single W production LEP2. Using from jjlv, jjjj, jjX lX final states, where j, l X represent a jet, lepton missing four-momentum, respectively, following set when one parameter is allowed vary others their Standard Model values of zero: Delta_g1z = -0.025^{+0.033}_{-0.030},...
Muon bremsstrahlung photons converted in front of the DELPHI main tracker (TPC) dimuon events at LEP1 were studied two photon kinematic ranges: 0.2<E γ ≤1 GeV and transverse momentum with respect to parent muon p T <40 MeV/c, 1<E ≤10 <80 MeV/c. A good agreement observed rate predictions from QED for inner was found, contrary anomalous soft excess that has been recently hadronic Z 0 decays. The obtained ratios signal predicted level are 1.06±0.12±0.07 energy range 1.04±0.09±0.12 GeV. dead...
Ensuring the radiation hardness of PbWO4 crystals was one main priorities during construction electromagnetic calorimeter CMS experiment at CERN. The production on an industrial scale hard and their certification over a period several years represented difficult challenge both for crystal suppliers. present article reviews related scientific technological problems encountered.
The performance of electromagnetic calorimeter modules made proton-irradiated PbWO4 crystals has been studied in beam tests. modules, similar to those used the Endcaps CMS (ECAL), were formed from 5×5 matrices crystals, which had previously exposed 24 GeV protons up integrated fluences between 2.1× 1013 and 1.3× 1014 cm−2. These correspond predicted charged-hadron ECAL at pseudorapidity η = 2.6 after about 500 fb−1 3000 respectively, corresponding end LHC High Luminosity operation periods....