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Update on FPS/LPS Combination

Update on FPS/LPS Combination. M. Kapishin , M. Ruspa , V. Sola. Nominal Fit Procedural Uncertainties t Range. FPS+LPS - Nominal Fit. Free Normalization WA -> χ 2 = 51 / 58 = 0.88 fit -> χ 2 = 48 / 58 = 0.83 Fit to systematics 1 HadEn_h1 -1.7338 0.6385

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Update on FPS/LPS Combination

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  1. Update onFPS/LPS Combination M. Kapishin, M. Ruspa, V. Sola • NominalFit • ProceduralUncertainties • tRange

  2. FPS+LPS - Nominal Fit Free Normalization WA -> χ2 = 51 / 58 = 0.88 fit -> χ2 = 48 / 58 = 0.83 Fit to systematics 1 HadEn_h1 -1.7338 0.6385 2 ElecEn_h1 0.8766 0.8972 3 ElecTh_h1 0.5426 0.7505 4 DifBeta_h1 0.2229 0.9307 5 DifXpom_h1 0.0056 0.9882 6 DifT_h1 0.7551 0.8295 7 EpFPS_h1 0.3380 0.5042 8 PxFPS_h1 0.2392 0.8268 9 PyFPS_h1 -0.3385 0.9080 10 DifQ2_h1 0.1734 0.9834 11 VtxEff_h1 -0.0268 0.9815 12 Backgr_h1 -0.3517 0.9268 13 Bcccor_h1 0.0556 0.9144 14 Norm_h1 0.7158 0.8866 15 Escale_zeus 0.4728 0.7736 16 Pdiss_zeus 0.3851 0.9591 17 xIPweight_zeus -0.0863 0.9900 18 Tweight_zeus -0.1672 0.9069 19 Norm_zeus -1.0736 0.7201 FPS+LPS - 13/05/2011

  3. FPS+LPS - 13/05/2011

  4. FPS+LPS - 13/05/2011

  5. Ratio WA/SGfit FPS+LPS - 13/05/2011

  6. Procedural Uncertainties • Swimming factors ZEUS (waiting for swimming factors from H1 Fit B - Sasha) • Bin centre corrections H1 (not yet) • Additive VS Multiplicative (done) • -> only normalization uncertainties are taken as multiplicative while • all other uncertainties are treated as additive • Correlations between H1 and ZEUS (done) • Similar systematic uncertainties identified • -> energy scales • -> background subtraction • -> xIP reweighting • -> t reweighting • 24 different averages are calculated assuming each of the 4 pair to be • correlated or uncorrelated FPS+LPS - 13/05/2011

  7. Ratio nominal case to case with all uncertainties additive FPS+LPS - 13/05/2011

  8. Ratio energy scales uncorrelated cross exp. (nominal) to case with energy scales correlated FPS+LPS - 13/05/2011

  9. Ratio nominal case to case with bgd subtraction+ xIP weight + t weight correlated FPS+LPS - 13/05/2011

  10. Procedural Uncertainties • Swimming factors ZEUS (waiting for swimming factors from H1 Fit B - Sasha) • Bin centre corrections H1 (not yet) • Additive VS Multiplicative (done) • -> only normalization uncertainties are taken as multiplicative while • all other uncertainties are treated as additive • Average effect ~ 4% (tbc) • Correlations between H1 and ZEUS (done) • Similar systematic uncertainties identified • -> energy scales • Average effect ~ 2 % and up to 10% for lower xIP bins (tbc) • -> background subtraction • -> xIP reweighting • -> t reweighting • Average effect ~ 1-2 % (tbc) FPS+LPS - 13/05/2011

  11. Restricted t Regions Brief summary H1: t-range = [0.1 - 0.7] GeV2, B ~ 6 GeV-2 varying with xIP, algebricalintegration [tmin- 1] ZEUS: t-range = [0.09 - 0.55] GeV2, B = 7 GeV-2, integration hidden in acceptance corr Inputs from Misha - H1 f2d3 integrated from f2d4 in the H1 t-range - H1 f2d3 integrated from f2d4 and extrapolated to the ZEUS t-range - correction factors for 7 xIP bins for "ZEUS" t-slope 7 GeV-2 from [0.1 - 0.7] to [tmin - 1] - correction factors for 7 xIP bins for "ZEUS" t-slope 7 GeV-2 from [0.09 - 0.55] to [tmin - 1] Average ratios (Misha) - H1 t-range -> H1 / ZEUS ~ 0.94 +/- 0.02 - ZEUS t-range -> H1 / ZEUS ~ 0.91 +/- 0.02 (using the stat+syst errors of the H1 and ZEUS data - except for the normalisationunc) Fit in the ZEUS t-range -> χ2 = 53 / 58 = 0.91 (H1 norm = 4.5%, ZEUS norm = 7%) FPS+LPS - 13/05/2011

  12. FPS+LPS - 13/05/2011

  13. FPS+LPS - 13/05/2011

  14. FPS+LPS - 13/05/2011

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