The Road towards Polarized Antiprotons

Abstract

The PAX-Collaboration is pursuing studies to find a method for producing an intense beam of polarized antiprotons. The following write-up gives a physics motivation, the possible methods and previous tests that have been performed. Currently spin-filtering in a suitable storage ring is the only viable method to achieve this goal. PAX has recently performed a spin-filtering measurement with protons in the COSY storage ring at Forschungszentrum Jülich (Germany) as a step towards an experiment with antiprotons, planned at CERN/AD. An outlook is also given as to what the possibility would be for exploiting a polarized antiproton beam in HESR at FAIR. All of the issues are discussed in a concise way – for more details the reader is referred to the given references