M. Calvetti

ORCID: 0000-0003-0125-2165
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About
Contact & Profiles
Research Areas
  • Particle physics theoretical and experimental studies
  • High-Energy Particle Collisions Research
  • Particle Detector Development and Performance
  • Quantum Chromodynamics and Particle Interactions
  • Dark Matter and Cosmic Phenomena
  • Computational Physics and Python Applications
  • Neutrino Physics Research
  • Cosmology and Gravitation Theories
  • Particle Accelerators and Free-Electron Lasers
  • Distributed and Parallel Computing Systems
  • Superconducting Materials and Applications
  • Radiation Detection and Scintillator Technologies
  • Medical Imaging Techniques and Applications
  • Black Holes and Theoretical Physics
  • Astrophysics and Cosmic Phenomena
  • Advanced Data Storage Technologies
  • Atomic and Subatomic Physics Research
  • Particle accelerators and beam dynamics
  • Nuclear Physics and Applications
  • Big Data Technologies and Applications
  • Advanced MRI Techniques and Applications
  • Scientific Research and Discoveries
  • Nuclear physics research studies
  • Atomic and Molecular Physics
  • Digital Radiography and Breast Imaging

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

University of Pisa
1977-2025

Northern Illinois University
2020-2024

Institute for High Energy Physics
2023-2024

Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
2004-2024

Institute of Science and Technology
2023-2024

A. Alikhanyan National Laboratory
2024

SR Research (Canada)
2024

Federación Española de Enfermedades Raras
2024

Atlas Scientific (United States)
2024

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.

10.1016/j.physletb.2015.04.068 article EN cc-by Physics Letters B 2015-05-05

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.

10.1016/s0370-2693(02)02476-0 article EN cc-by Physics Letters B 2002-09-01

We report the results from a study of ~23 Million K+- ==&gt; 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.

10.1016/j.physletb.2005.11.087 article EN cc-by Physics Letters B 2005-12-15

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...

10.1140/epjc/s10052-010-1480-6 article EN cc-by-nc The European Physical Journal C 2010-11-05

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...

10.1140/epjc/s10052-008-0547-0 article EN cc-by-nc The European Physical Journal C 2008-02-18
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