Spin Physics at FAIR

Marco Destefanis
Thursday, February 6, 2014 - 15:15 - 16:15
Nuclear and Particle Physics

The nucleonic structure is still not completely understood. A transverse momentum dependent description of the nucleon structure is a crucial milestone for several forthcoming studies in a wide range of experimental scenarios. By mean of antiproton beams, eventually polarised, with a beam momentum up to 15 GeV/c, which will be available at the future FAIR facility, the nonperturbative region of the QCD is planned to be investigated. One of the main goal of the forthcoming experiments at FAIR is the study of Drell-Yan lepton pairs by means of proton-antiproton annihilations, taking also advantage of the expected high luminosity. The Drell-Yan production is a unique tool to access the spin depending properties of the nucleon, and in particular its transverse degrees of freedom. Transverse Momentum Dependent (TMD) Parton Distribution Functions (PDF’s), i.e. the Boer-Mulders function, the Sivers function, and the Transversity, could be deeply investigated by mean of experimental asymmetries. In later stages of FAIR single- and double-spin asymmetries could be investigated as well. The Drell-Yan physics program which could be accessed at FAIR, particularly focused on the PANDA experiment, will be discussed in details.