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@TECHREPORT{Krammer:396404,
      author       = {Krammer, M. and Krasemann, H.},
      title        = {{Q}uarkonia},
      number       = {DESY-79-020},
      reportid     = {PUBDB-2017-12740, DESY-79-020},
      pages        = {65},
      year         = {1979},
      abstract     = {When the J/ψ and ψ’ were discovered in fall 1974 [1] we
                      all witnessed a dramatic and beautiful revival of the quark
                      model [2]. The predicted new quark flavour, c = charm [3]
                      could be added to the hadron spectroscopy by the
                      interpretation of the new particles as c c¯ bound states.
                      It was argued that the new system is nonrelativistic:
                      Charmonium [4]. Whereas the old mesons suffered from the
                      fact that the quarks are extremely relativistic (mass
                      differences are of the order of the masses themselves), in
                      Charmonium the heavy (≈ 1.5 GeV) c-quarks should move
                      relatively slowly, β2 = (v/c)2 ≈ 0.2. The well known
                      powerful methods of exploring a nonrelativistic system could
                      be used. This was the source of real excitement about the
                      new particles.},
      keywords     = {LECTURES (INSPIRE) / QUARK: QUARKONIUM (INSPIRE) / QUARK:
                      CHARMONIUM (INSPIRE) / QUANTUM MECHANICS: SCHROEDINGER
                      EQUATION (INSPIRE) / SCALING: SCHROEDINGER EQUATION
                      (INSPIRE) / bottom (INSPIRE) / QUARK ANTIQUARK: BOUND STATE
                      (INSPIRE) / QUARK: CHARGE (INSPIRE) / DUALITY (INSPIRE) /
                      FINE STRUCTURE: CHARMONIUM (INSPIRE) / HYPERFINE STRUCTURE:
                      CHARMONIUM (INSPIRE) / PSI MESONS: ENERGY LEVELS (INSPIRE) /
                      PSI MESONS: RADIATIVE DECAY (INSPIRE) / RADIATIVE DECAY: PSI
                      MESONS (INSPIRE) / TRANSITION: ELECTRIC (INSPIRE) /
                      TRANSITION: MAGNETIC (INSPIRE) / SCALING: RADIATIVE DECAY
                      (INSPIRE) / RADIATIVE DECAY: SCALING (INSPIRE) / X(2830)
                      (INSPIRE) / NEW PARTICLE: CHI(3450) (INSPIRE) / NEW
                      PARTICLE: CHI(3590) (INSPIRE) / ELECTRON POSITRON:
                      ANNIHILATION (INSPIRE) / ANNIHILATION: ELECTRON POSITRON
                      (INSPIRE) / QUANTUM CHROMODYNAMICS (INSPIRE) / JET (INSPIRE)
                      / BIBLIOGRAPHY (INSPIRE)},
      cin          = {DESY(-2012)},
      cid          = {$I:(DE-H253)DESY_-2012_-20170516$},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)29 / PUB:(DE-HGF)15},
      doi          = {10.1007/978-3-7091-8574-2_4},
      url          = {https://bib-pubdb1.desy.de/record/396404},
}