x-dependent uncertainties (contd.)

• quark polarization (for prompt photon)

  • DIS experimental error & theoretical calculation
  • E143 - g1p/F1p error 20%-8% for x=0.04-0.25 in 15bins
  • asymmetry measurement of W/Z(/DY)

hep-ph/9802357

SMC - squares

E143 - solid circles [Q2ɭ(GeV/c)2]

diamonds [Q2ə(GeV/c)2]

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