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Träfflista för sökning "WFRF:(Ghio F.) "

Sökning: WFRF:(Ghio F.)

  • Resultat 1-10 av 19
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1.
  • Bantes, B., et al. (författare)
  • The BGO calorimeter of BGO-OD experiment
  • 2015
  • Ingår i: Journal of Physics: Conference Series. - : IOP Publishing. - 1742-6588. ; 587:1
  • Tidskriftsartikel (refereegranskat)abstract
    • The BGO Rugby Ball is a large solid angle electromagnetic calorimeter now installed in the ELSA Facility in Bonn. The BGO is operating in the BGO-OD experiment aiming to study meson photoproduction off proton and neutron induced by a Bremsstrahlung polarized gamma beam of energies from 0.2 to 3.2 GeV and an intensity of 5 × 107 photons per second. The scintillating material characteristics and the photomultiplier read-out make this detector particularly suited for the detection of medium energy photons and electrons with very good energy resolution. The detector has been equipped with a new electronics read-out system, consisting of 30 sampling ADC Wie-Ne-R modules which perform the off-line reconstruction of the signal start-time allowing for a good timing resolution. Performances in linearity, resolution and time response have been carefully tested at the Beam Test Facility of the INFN National Laboratories in Frascati by using a matrix of 7 BGO crystals coupled to photomultipliers and equipped with the Wie-Ne-R sampling ADCs.
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2.
  • Leo, Veronica De, et al. (författare)
  • Recent results of the BGO-OD experiment at ELSA facility
  • 2013
  • Ingår i: Journal of Physics: Conference Series. - : IOP Publishing. - 1742-6588. ; 424:1
  • Tidskriftsartikel (refereegranskat)abstract
    • The results obtained at the BGO-OD experiment with the BGO calorimeter, equipped with the new electronic readout based on sampling ADCs, during the tests performed with the beam time of March and June 2012 are presented. The proper functioning of the apparatus has allowed the reconstruction of the pseudo-scalar mesons π0 and η invariant masses. The simulation of the η' photoproduction reaction prepared for a proposal to the joint ELSA-MAMI Physics Advisory Committee is also presented.
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3.
  • Alef, S., et al. (författare)
  • Commissioning and initial experimental program of the BGO-OD experiment at ELSA
  • Ingår i: 14th InternationalWorkshop on Meson Production, Properties and Interaction, MESON 2016,Cracow, Poland,2016-06-02 - 2016-06-07. - : EDP Sciences. ; 130
  • Konferensbidrag (refereegranskat)abstract
    • BGO-OD is a new meson photoproduction experiment at the ELSA facility of Bonn University. It aims at the investigation of non strange and strange baryon excitations, and is especially designed to be able to detect weekly bound meson-baryon type structures. The setup for the BGO-OD experiment is presented, the characteristics of the photon beam and the detector performances are shown and the initial experimental program is discussed.
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4.
  • Alef, S., et al. (författare)
  • The BGOOD experimental setup at ELSA
  • Ingår i: European Physical Journal A. - : Springer. - 1434-6001. ; 56:4
  • Tidskriftsartikel (refereegranskat)abstract
    • The BGOOD experiment at the ELSA facility in Bonn has been commissioned within the framework of an international collaboration. The experiment pursues a systematic investigation of non-strange and strange meson photoproduction, in particular t-channel processes at low momentum transfer. The setup uniquely combines a central almost 4 π acceptance BGO crystal calorimeter with a large aperture forward magnetic spectrometer providing excellent detection of both neutral and charged particles, complementary to other setups such as Crystal Barrel, Crystal Ball, LEPS and CLAS.
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5.
  • Jude, T. C., et al. (författare)
  • Strangeness photoproduction at the BGO-OD experiment
  • 2017
  • Ingår i: 17th International Conference on Hadron Spectroscopy and Structure, Hadron 2017,Salamanca, Spain,2017-09-25 - 2017-09-29. ; 310
  • Konferensbidrag (refereegranskat)abstract
    • The BGO-OD experiment at the ELSA accelerator facility uses an energy tagged bremstrahlung photon beam to investigate the excitation spectrum of the nucleon. The setup consists of a highly segmented BGO calorimeter surrounding the target, with a particle tracking magnetic spectrometer at forward angles. BGO-OD is ideal for investigating the photoproduction of hadrons of non-zero strangeness. The high momentum resolution at forward angles covers a kinematic region where t-channel exchange mechanisms play a dominant role. Access to this low momentum transfer region also allows the investigation of degrees of freedom not derived from constituent quark models, for example, the role of (vector) meson - baryon interactions and dynamically generated states in photoproduction reactions. Data taking for the first part of an extensive physics programme is complete and preliminary results and ongoing analysis are presented.
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6.
  • Miliucci, M., et al. (författare)
  • Kaonic Deuterium Precision Measurement at DA Φ NE : The SIDDHARTA-2 Experiment
  • Ingår i: 22nd International Conference on Few-Body Problems in Physics, FB22 2018,Caen, France,2018-07-09 - 2018-07-13. - : Springer Gabler. ; 238, s. 965-969
  • Bokkapitel (refereegranskat)abstract
    • Light kaonic atoms spectroscopy offers the unique opportunity to perform experiments equivalent to scattering at vanishing relative energies. This allows the determination of the antikaon-nucleus interaction at threshold, without the need of extrapolation to zero energy, as in the case of scattering experiments. In this framework, the SIDDHARTA-2 collaboration aims to perform the first measurement of kaonic deuterium transition to the fundamental level, which is mandatory to extract the isospin dependent antikaon—nucleon scattering lengths. The experiment will be carried out at the DA(formula presented)NE collider of LNF-INFN in 2019–2020.
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7.
  • Trippl, C., et al. (författare)
  • A New Silicon Drift Detector System for Kaonic Atom Measurements
  • Ingår i: 10th International Conference on Precision Physics of Simple Atomic Systems, PSAS 2018,Vienna, Austria,2018-05-14 - 2018-05-18. - : IOP Publishing. ; 1138:1
  • Tidskriftsartikel (refereegranskat)abstract
    • The kaonic deuterium measurement at J-PARC and DAΦNE will provide a piece of information still missing to the antikaon-nucleon interaction close to threshold, providing valuable information to answer one of the most fundamental problems in hadron physics today - to the yet unsolved puzzle of how the hadron mass is generated. For this a new X-ray detector system has been developed to measure the shift and width of the 2p → 1s transition of kaonic deuterium with a precision of 60 eV and 140 eV, respectively.
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8.
  • Curceanu, C., et al. (författare)
  • Kaonic deuterium measurement with Siddharta-2 on daΦNE
  • 2020
  • Ingår i: Acta Physica Polonica B. - : Jagellonian University, Cracow, Poland. - 0587-4254. ; 51:1, s. 251-257
  • Tidskriftsartikel (refereegranskat)abstract
    • The interaction of antikaons with nucleons and nuclei in the low-energy regime represents an active research field in hadron physics with still many important open questions. The investigation of light kaonic atoms is, in this context, a unique tool to obtain precise information on this interaction. The most precise kaonic hydrogen measurement to date, together with an exploratory measurement of kaonic deuterium, were carried out by the SIDDHARTA Collaboration at the DAΦNE electron–positron collider of LNF-INFN, by combining the excellent quality kaon beam delivered by the collider with new experimental techniques, as fast and precise Silicon-Drift X-ray detectors. The measurement of kaonic deuterium will be realized in the near future by SIDDHARTA-2, a major upgrade of SIDDHARTA.
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9.
  • Curceanu, C., et al. (författare)
  • Low-energy kaon-nuclei interaction studies at DAΦNE : Siddharta-2 and amadeus
  • Ingår i: Acta Physica Polonica B. - : Jagellonian University, Cracow, Poland. - 0587-4254. ; 48:10, s. 1855-1860
  • Tidskriftsartikel (refereegranskat)abstract
    • The DAΦNE electron-positron collider of the Laboratori Nazionali di Frascati of INFN has made available a unique quality low-energy negatively charged kaons "beam", which is being used to study the kaon-nucleon/nuclei interactions by the SIDDHARTA-2 experiment and the AMADEUS Collaboration. The dynamics of the strong interaction processes in the nonperturbative regime is approached by lattice calculations and effective field theories (ChPT) which are still lacking experimental results in the lowenergy regime, fundamental for their good understanding. The studies of kaonic atoms and of the kaonic nuclear processes performed by SIDDHARTA- 2 and AMADEUS play in this context a key-role.
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10.
  • Curceanu, C., et al. (författare)
  • The kaonic atoms research program at DAΦNE : Overview and perspectives
  • Ingår i: 10th International Conference on Precision Physics of Simple Atomic Systems, PSAS 2018,Vienna, Austria,2018-05-14 - 2018-05-18. - : IOP Publishing. ; 1138:1
  • Tidskriftsartikel (refereegranskat)abstract
    • The interaction of antikaons with nucleons and nuclei in the low-energy regime represents an active research field in hadron physics with still many important open questions. The investigation of light kaonic atoms is, in this context, a unique tool to obtain precise information on this interaction. The energy shift and broadening of the lowest-lying states of such atoms, induced by the kaon-nucleus strong interaction, can be determined with high precision from atomic X-ray spectroscopy. This experimental method provides unique information to understand the low energy kaon-nucleus interaction at threshold. The lightest atomic systems, kaonic hydrogen and kaonic deuterium, deliver the isospin-dependent kaon-nucleon scattering lengths. The most precise kaonic hydrogen measurement to date, together with an exploratory measurement of kaonic deuterium, were carried out by the SIDDHARTA collaboration at the DAΦNE electron-positron collider of LNF-INFN, by combining the excellent quality kaon beam delivered by the collider with new experimental techniques, as fast and precise X-ray detectors: Silicon Drift Detectors. The measurement of kaonic deuterium will be realized in the near future by SIDDHARTA-2, a major upgrade of SIDDHARTA. In this paper an overview of the main results obtained by SIDDHARTA together with the future plans, are given.
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  • Resultat 1-10 av 19
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