Internal nucleon structure in the Clas12 spectometer.
I - Fisica nucleare e subnucleare
Aula Palazzo dell'Emiciclo - Sala Ipogea - Mercoledì 25 h 10:00 - 13:00
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The CLAS12 spectometer (TJNAF, USA) started operations in February 2018, with a high-energy, high-intensity luminosity electron beam on unpolarized liquid hidrogen and deuterium target which has been taken since then. A significant part of the CLAS12 experimental program is devoted to the study of the internal structure of the nucleon, by mapping in 3D the spatial and momentum distributions of the quarks and gluons (called partons) inside the nucleon. The process studied is the semi-inclusive or exclusive deep inelastic scattering, in which a high energy electron interacts with a target nucleon to produce one or more hadrons in the final state. The cross section for these processes can be written as a function of the partonic distribution functions, allowing their extraction from the experimental data. The preliminary results of the CLAS12 experiment in SIDIS measurements will be presented.