Prospects for Quarkonium Physics at HERA
  We work out and review prospects for future quarkonium physics at HERA. We focus on the impact of color-octet contributions and discuss how measurements at HERA can be used to test the picture of quarkonium production as developed in the context of the NRQCD factorization approach. 
Matteo Cacciari and Michael Kr\"amer (DESY)