The Parton Model and Perturbative QCD

{
  description: 'Deep inelastic lepton-hadron scattering',
  width: 200,
  height: 180,
  incoming: {i1: '10,50', i2: '10,130'},
  outgoing: {o1: '135,10', o2: '190,90'},
  vertex: {v1: '90,50', v2: '135,90', v3: '99,122'},
  fermion: {line: 'i1-v1-o1,v3-v2-o2'},
  photon: {line: 'v1-v2'},
  symbol: {s1: ['i2', 0, 'hadron', 80, 4],
    s2: ['98,137', 41.634, 'hadron', 40, 4, true],
    s3: ['85,130', 0, 'blob', 10, 10],
    s4: ['115,55', 41.634, 'arrow', 16]},
  label: {t1: ['50,43', 'k'], t2: ['110,23', 'k′'],
    t3: ['130,53', 'q'], t4: ['160,80', 'p + q'],
    t5: ['125,117', 'p'], t6: ['50,119', 'P']}
}
Fig.1 Deep inelastic lepton-hadron scattering (SVG, EPS, PDF)
{
  description: 'The Drell-Yan process for lepton pair production',
  width: 280,
  height: 160,
  incoming: {i1: '80,130', i2: '200,130'},
  outgoing: {o1: '80,10', o2: '200,10'},
  vertex: {v1: '140,100', v2: '140,40'},
  fermion: {line: 'i1-v1-i2,o2-v2-o1'},
  photon: {line: 'v2-v1'},
  symbol: {s1: ['10,130', 0, 'hadron', 60, 4],
    s2: ['270,130', 180, 'hadron', 60, 4],
    s3: ['75,133', 26.565, 'hadron', 35, 4, true],
    s4: ['205,133', 153.435, 'hadron', 35, 4, true],
    s5: ['65,130', 0, 'blob', 10, 10],
    s6: ['195,130', 0, 'blob', 10, 10],
    s7: ['168,36', -26.565, 'arrow', 16],
    s8: ['152,80', -90, 'arrow', 16],
    s9: ['180,110', -153.435, 'arrow', 16]},
  label: {t1: ['40,119', 'P'], t2: ['240,119', 'P′'],
    t3: ['110,43', 'k'], t4: ['180,48', 'k′'], t5: ['162,72', 'q'],
    t6: ['110,105', 'p'], t7: ['180,98', 'p′']}
}
Fig.2 The Drell-Yan process for lepton pair production (SVG, EPS, PDF)
{
  description: 'Deeply virtual Compton scattering',
  width: 220,
  height: 150,
  incoming: {i1: '10,100', i2: '210,100'},
  outgoing: {o1: '10,10', o2: '210,10'},
  vertex: {v1: '62,40', v2: '158,40', v3: '62,100', v4: '158,100'},
  fermion: {line: 'v3-v1-v2-v4'},
  photon: {clockwise: true, line: 'v1-o1,v2-o2'},
  symbol: {s1: ['10,135', -29.982, 'hadron', 53, 4],
    s2: ['165,110', 29.982, 'hadron', 53, 4],
    s3: ['52,110', 0, 'blob', 53, 10, true],
    s4: ['25,33', 29.982, 'arrow', 16],
    s5: ['185,38', -29.982, 'arrow', 16]},
  label: {t1: ['29,113', 'P'], t2: ['196,113', 'P′'],
    t3: ['29,50', 'q'], t4: ['196,47', 'q′'], t5: ['52,75', 'k'],
    t6: ['108,32', 'k + q'], t7: ['170,75', 'k′']}
}
Fig.3 Deeply virtual Compton scattering (SVG, EPS, PDF)