1. Hierarchies of Matter matter crystal atom atomic nucleus nucleon quarks 10 -9 m 10 -10 m 10 -14 m 10 -15 m < 10 -18 m (macroscopic) confinement hadron masses general features: constituents observed as free particles nucleon: constituents (quarks) not observed as free particles

2. Outstanding Issues in Hadron Physics How are hadrons (baryons and mesons) built from quarks and gluons? Can we quantitatively account for the confinement of quarks and gluons inside hadrons? What determines the nucleon mass? e.g., nucleon = complex many-body system of quarks and gluons

3. J/ spectroscopy confinement glueballs (ggg) and hybrids (ccg) hidden and open charm mesons in nuclei hypernuclei Physics program at the HESR Further possibilities: Inverted Deeply Virtual Compton Scattering CP-violation (D/ -sector) fundamental symmetries; p in traps

4. QCD systems to be studied at HESR

5. High Energy Storage Ring and Detector Concept L = 2·10 32 cm -2 s -1 ; p = 1.5 – 15 GeV/c

6. Why antiprotons? large at low momentum transfer; important for in-medium "implantation" of hadrons: study of in-medium effects high beam quality by stochastic and electron cooling micro vertex trigger for D-meson physics high resolution spectroscopy with p-beams in formation experiments: E, E beam high yields in pp of gluonic excitations (glueballs, hybrids) event tagging by pairwise (particle, particle) production, e.g. pp

7. International Competition CLEOc, BES, JLab (HALL D), JHF

8. The HESR - Community T.Barnes D.Bettoni R.Calabrese W.Cassing M.Düren S.Ganzhur O.Hartmann V.Hejny P.Kienle H.Koch W.Kühn U.Lynen V.Metag H.Orth S.Paul K.Peters J.Pochodzalla J.Ritman L.Schmitt C.Schwarz K.Seth W.Weise U.Wiedner Proposal ContributorsParticipating InstitutionsProposal Supporters G.Bali I.Bigi T.Bressani T.Ericson D.Hilscher J.Jastrzebski J.Kisiel W.Kluge M.Locher J.-M.Richard D.O.Riska G.Rosner T.Thomas N.Tornquist Ruhr - University Bochum Rheinische Friedrich - Wilhelms - University Bonn INFN, National Laboratory Catania, Italy GSI Darmstadt Technical University Darmstadt Northwestern University, Evanston, USA University of Ferrara, Italy Johann Wolfgang Goethe University Frankfurt Justus - Liebig - University Giessen Ruprecht - Karls - University Heidelberg Forschungszentrun Jülich Jagiellonian University Krakow INFN, National Laboratory Legnaro, Italy Johannes Gutenberg University Mainz Westfälische Wilhelms - University Münster Ludwig - Maximilians - University Munich Technical University Munich University of Torino, Italy Uppsala University, Sweden Warsaw University, Poland

9. Summary Antiprotons in the HESR will...... provide a broad and challenging research program (cc), (ccg), (ggg), m D, A, IDVCS, CP, CPT... allow GSI to play a leading role in exploring long distance (non-perturbative) QCD... be an integral part of GSI's efforts to unravel all facets of the strong interaction and of hadronic matter (p, AA-collisions, exotic nuclei)