No abstract available

[en] In front-form dynamics a current operator for systems of interacting particles, which fulfills Poincare, parity and time reversal covariance, together with hermeticity, can be defined. The electromagnetic form factors can be extracted without any ambiguity and in the elastic case the continuity equation is automatically satisfied. Applications to the calculation of deuteron form factors are presented, and the effects of different nucleon-nucleon interactions, as well as of different nucleon form factors are investigated

[en] Short communication

[en] Preliminary results for the proton and neutron electromagnetic form factors, calculated within a front-form constituent quark model, are presented. A Poincare covariant electromagnetic current operator for systems of interacting particles has been used and an effective quark mass at the photon-quark vertex has been introduced for a first insight of many body effects in the electromagnetic current

[en] The purpose of the Workshop was to discuss the up-to-date theoretical understanding of Synchrotron Radiation Spectroscopies through a strong interaction between theorists and experimentalists and to highlight the advances in the fundamental aspects of the theory as well as developments of efficient theoretical methods to calculate and simulate experiments

[en] A review of the hadron electromagnetic form factors obtained in a light-front constituent quark model, based on the eigenfunctions of a mass operator, is presented. The relevance of different components in the q-q interaction for the description of hadron experimental form factors is analysed

[en] This work reviews some general results obtained by our group in the framework of a programme focused on the development and the characterisation of Vacuum-UV (VUV) CVD diamond photodetectors to address the requirements of space missions where pixel and 2-D arrays are used. We discuss the performance of detectors based on single crystal diamond films and CVD polycrystalline diamond films. The performance of these devices in the dark and under illumination was investigated and the results were compared to those from CCD and MCP detectors. The status of diamond detector technology is finally described in order to highlight its advantages over more traditional detectors and the aspects requiring further developments

[en] The pion electromagnetic form factor is calculated in the space- and time-like regions from -10 (GeV/c)² up to 10 (GeV/c)², within a front-form model. The dressed photon vertex where a photon decays in a quark-antiquark pair is depicted generalizing the vector meson dominance ansatz, by means of the vector meson vertex functions. An important feature of our model is the description of the on-mass-shell vertex functions in the valence sector, for the pion and the vector mesons, through the front-form wave functions obtained within a realistic quark model. The theoretical results show an excellent agreement with the data in the space-like region, while in the time-like region the description is quite encouraging

[en] The first application of a thinned back-illuminated ion-implanted and laser annealed CCD as a detector for extreme ultraviolet spectroscopy is described. The observed stigmatic spectra are in the 40-70 nm region and are produced by the excitation of some noble gases in open hollow cathode source installed in a normal incidence toroidal grating spectrograph. The results are compared with spectra obtained by other detector systems applied to the same instrumentation, showing that the CCD offers a much greater detection capability than a system using a converting scintillator and a comparable one with respect to a photon counting detector. (author)

[en] Short communication