It has recently been suggested by the PAX collaboration that collisions of transversely polarized protons and antiprotons at the GSI-FAIR can be used to determine the nucleon's transversity densities from measurements of the double-spin asymmetry for the Drell-Yan process. The theoretical expectations for this observable are ill the 0.3-0.4 range at the FAIR-HESR enrgies. PAX therefore proposes to build a polarized antiproton stored beam suitable for this measurament. Polarized antiprotons will be produced by spin filtering with ail internal polarized gas target in a storage ring. The polarization buildup will be tested for the first time in an an antiproton beam at AD, CERN, and verified in a proton beam at COSY, Juelich. These tests experiments will be briefly outlined as well as the design and performance of the PAX accelerator setup and detector.
Polarized antiproton at GSI: the PAX experiment
FERRETTI, Paola
2006
Abstract
It has recently been suggested by the PAX collaboration that collisions of transversely polarized protons and antiprotons at the GSI-FAIR can be used to determine the nucleon's transversity densities from measurements of the double-spin asymmetry for the Drell-Yan process. The theoretical expectations for this observable are ill the 0.3-0.4 range at the FAIR-HESR enrgies. PAX therefore proposes to build a polarized antiproton stored beam suitable for this measurament. Polarized antiprotons will be produced by spin filtering with ail internal polarized gas target in a storage ring. The polarization buildup will be tested for the first time in an an antiproton beam at AD, CERN, and verified in a proton beam at COSY, Juelich. These tests experiments will be briefly outlined as well as the design and performance of the PAX accelerator setup and detector.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
