Generalized Parton Distributions program at COMPASS

Le résumé fourni par la source

Understanding the structure of the nucleon remains one of the key challenges of nuclear physics. Yet, there are many open questions concerning the nucleon structure: For instance, the total spin of the proton cannot be explained by the sum of the spins of the quarks it contains; this is called the proton spin puzzle. The Generalized Parton Distributions (GPDs) grant a new insight on the study of the nucleon structure, as they provide a three-dimensional picture of the nucleon. They may also grant access to quark orbital angular momentum, which is one of the possible keys to solve the proton spin puzzle. COMPASS at CERN has a great potential for GPD studies, with its forthcoming measurement of deeply virtual Compton scattering and exclusive meson production off the proton with both polarized μ+ and μ−. The current COMPASS GPD program will be discussed. Existing results of DVCS and exclusive meson production will be presented. An overview of the investigation on future possible developments will briefly be introduced.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.