A. Margotti

ORCID: 0000-0003-2146-0391
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About
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Research Areas
  • Particle physics theoretical and experimental studies
  • High-Energy Particle Collisions Research
  • Quantum Chromodynamics and Particle Interactions
  • Particle Detector Development and Performance
  • Radiation Detection and Scintillator Technologies
  • Dark Matter and Cosmic Phenomena
  • Nuclear reactor physics and engineering
  • Superconducting Materials and Applications
  • Neutrino Physics Research
  • Atomic and Subatomic Physics Research
  • Astrophysics and Cosmic Phenomena
  • Particle accelerators and beam dynamics
  • Atomic and Molecular Physics
  • Particle Accelerators and Free-Electron Lasers
  • Nuclear Physics and Applications
  • Muon and positron interactions and applications
  • Radiation Effects in Electronics
  • Solar and Space Plasma Dynamics
  • Medical Imaging Techniques and Applications
  • Nuclear physics research studies
  • Stochastic processes and statistical mechanics
  • Pulsars and Gravitational Waves Research
  • Statistical Methods and Bayesian Inference
  • Cosmology and Gravitation Theories
  • Advanced Optical Sensing Technologies

Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2016-2025

A. Alikhanyan National Laboratory
2017-2024

Polytechnic University of Bari
2023

Istituto Nazionale di Fisica Nucleare
1993-2018

University of Bergen
2014

European Organization for Nuclear Research
1991-2012

Tel Aviv University
2012

Andrews University
2012

University of Bristol
2012

University of Malaya
2012

The production of D+- and D0 mesons has been measured with the ZEUS detector at HERA using an integrated luminosity 133.6 pb-1. measurements cover kinematic range 5 < Q^2 1000 GeV^2, 0.02 y 0.7, 1.5 p_T^D 15 GeV eta^D 1.6. Combinatorial background to D meson signals is reduced by microvertex reconstruct displaced secondary vertices. Production cross sections are compared predictions next-to-leading-order QCD which found describe data well. Measurements extrapolated full phase space in order...

10.1140/epjc/s10052-009-1088-x article EN cc-by-nc The European Physical Journal C 2009-08-10

Next-to-leading-order QCD analyses of the ZEUS data on deep inelastic scattering together with fixed-target have been performed, from which gluon and quark densities proton value strong coupling constant αs(MZ) were extracted. The study includes a full treatment experimental systematic uncertainties including point-to-point correlations. resulting in parton density functions are presented. A combined fit for yields agreement world average. derived alone indicate importance HERA determining...

10.1103/physrevd.67.012007 article EN Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 2003-01-31

A resonance search has been made in the K0Sp and K0Sp̄ invariant-mass spectrum measured with ZEUS detector at HERA using an integrated luminosity of 121 pb−1. The was performed central rapidity region inclusive deep inelastic scattering ep centre-of-mass energy 300–318 GeV for exchanged photon virtuality, Q2, above 1 GeV2. Recent results from fixed-target experiments give evidence a narrow baryon decaying to K+n K0Sp, interpreted as pentaquark. presented here support existence such state,...

10.1016/j.physletb.2004.04.024 article EN cc-by Physics Letters B 2004-05-14

A small electromagnetic sampling calorimeter, installed in the ZEUS experiment 1995, significantly enhanced acceptance for very low x and Q^2 inelastic neutral current scattering, e^{+}p \to e^{+}X, at HERA. measurement of proton structure function F_2 total virtual photon-proton (\gamma^*p) cross-section is presented 0.11 \le Q^{2} 0.65 GeV^2 2 \times 10^{-6} 6 10^{-5}, corresponding to a range \gamma^{*}p c.m. energy 100 W 230 GeV. Comparisons with various models are also presented.

10.1016/s0370-2693(97)00905-2 article EN cc-by-nc-nd Physics Letters B 1997-09-01

The photoproduction reaction gamma p -> mu+ mu- has been studied in ep interactions using the ZEUS detector at HERA. data sample corresponds to an integrated luminosity of 43.2 pb^{-1}. Upsilon meson observed for first time. sum products elastic Upsilon(1S), Upsilon(2S), Upsilon(3S) cross sections with their respective branching ratios is determined be 13.3 +- 6.0(stat.)^{+2.7}_{-2.3}(syst.) pb a mean photon-proton centre mass energy 120 GeV. section above prediction perturbative QCD model.

10.1016/s0370-2693(98)01081-8 article EN cc-by-nc-nd Physics Letters B 1998-10-01

This paper presents measurements of D∗± production in deep inelastic scattering from collisions between 27.5 GeV positrons and 820 protons. The data have been taken with the ZEUS detector at HERA. decay channel D∗+ → (D0 K−π+)π+ (+c.c) has used study. e+p cross section for inclusive 5 < Q2 100 GeV2> y 0.7 is 5.3 ± 1.0 0.8 nb kinematic region 1.3 pT(D∗±) 9.0 |η(D∗±)| 1.5. Differential sections as functions pT(D∗±), η(D∗±), W are compared next-to-leading order QCD calculations based on...

10.1016/s0370-2693(97)00847-2 article EN cc-by-nc-nd Physics Letters B 1997-09-01

Inclusive production of D*± (2010) mesons in deep inelastic scattering has been measured with the ZEUS detector at DESY HERA using an integrated luminosity 81.9 pb−1. The decay channel D*+→D0π+ D0→K−π+ and corresponding antiparticle were used to identify D* mesons. Differential cross sections 1.5<Q2<1000GeV2 0.02<y<0.7 kinematic region 1.5<pT(D*)<15GeV |η(D*)|<1.5 are compared different QCD calculations incorporating parametrizations parton densities proton. data show sensitivity gluon...

10.1103/physrevd.69.012004 article EN Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology 2004-01-30

Inclusive jet differential cross sections have been measured in neutral current deep inelastic e+p scattering for boson virtualities Q2>125 GeV2. The data were taken using the ZEUS detector at HERA and correspond to an integrated luminosity of 38.6 pb−1. Jets identified Breit frame longitudinally invariant kT cluster algorithm. Measurements inclusive are presented as functions transverse energy (EBT,jet), pseudorapidity Q2, jets with EBT,jet>8 GeV. Next-to-leading-order QCD calculations...

10.1016/s0370-2693(02)02763-6 article EN cc-by Physics Letters B 2002-11-01

This paper reports the cross section measurements for process ep → e J/ψ p Q2 < 4 GeV2 at s = 296 GeV, based on an integrated luminosity of about 0.5 pb−1, using ZEUS detector. The was detected in its e+e− and μ+μ− decay modes. photoproduction measured to be 52−12+7 ± 10 nb average γp centre mass energy 67 GeV 71−20+13±12 114 GeV. significant rise compared lower is not agreement with VDM models, but can described by QCD inspired models if a gluon momentum density low x proton assumed.

10.1016/0370-2693(95)00403-8 article EN cc-by-nc-nd Physics Letters B 1995-05-01

A search for single-top production, ep --> etX, has been made with the ZEUS detector at HERA using an integrated luminosity of 130.1 pb-1. Events from both leptonic and hadronic decay channels W boson resulting top quark were sought. For mode, was events isolated high-energy leptons significant missing transverse momentum. three-jet in which two jets had invariant mass consistent that selected. No evidence production found. The results are used to constrain via flavour-changing neutral...

10.1016/s0370-2693(03)00333-2 article EN cc-by Physics Letters B 2003-04-23

Isolated photon production in deep inelastic ep scattering has been measured with the ZEUS detector at HERA using an integrated luminosity of 320pb^-1. Measurements were made isolated-photon transverse-energy and pseudorapidity ranges 4 < E_T 15 GeV -0.7 eta 0.9 for exchanged virtualities, Q^2, range 10 Q^2 350 invariant masses hadronic system W_X> 5 GeV. Differential cross sections are presented inclusive isolated as functions x, eta. Leading-logarithm parton-shower Monte Carlo simulations...

10.1016/j.physletb.2010.02.045 article EN cc-by Physics Letters B 2010-02-21
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