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2006 EEMC Neutral Pions: Expanded Run List

Updated on Tue, 2013-01-15 10:20. Originally created by drach09 on 2012-12-31 15:58.

Hal and Steve have put together an expanded run list including some runs which lack relative luminosity information necessary for ALL but not AN. The proposed list is now 470 transverse runs long of which only 15 runs lack trees. I post, here, the asymmetries calculated for the available expanded runs. The increase in statistics appears to be fairly modest (~10% increase in good pions). For the expanded list asymmetries I have used the symmetric mass window referenced in the previous update for the mass window systematic. I have also corrected a mistake in my code. Previous updates incorrectly calculated the systematic for the background asymmetry. The procedure has changed in light of this an an update will be forthcoming.

Figure 1

In Fig.1 I post the current status of the asymmetries with the new runs added. Contrary to previous blogs, I now plot the systematic uncertainties as shaded boxes, rather than bracket-style errors. Statistical uncertainties are still shown as traditional error bars. Note that systematic errors are shown as bracket errors in Figs. 2 and 3 for previous figures.

Figure 2

Expanded Run List Standard Run List

The new results are entirely consistent with previous results. There is some change in systematics which is connected largely to correcting the mistake in the background asymmetry systematic as well as switching to the symmetric window. The central values shift, somewhat, but not dramatically. This is as I would expect with a modest increase in statistics. The p0's also appear rather similar.

Figure 3

Expanded Run List Standard Run List

The story is quite similar with the pT dependence. There is some shifting in the central values but not much. The systematics have changed somewhat with the changes. The p0's are also similar. They also appear to be somewhat more tightly scattered, but perhaps that is just my eyes.

Table 1: Expanded Run List

  pT Blue pT Yellow xF Blue xF Yellow
χ2/ν 5.35085/8 14.0435/8 0.607805/2 3.6786/2
p0 -0.00272623±0.00973172 0.00339444±0.00942069 -0.00346015±0.00958788 0.00498536±0.00926762

Here I have fit the p0 distirbutions with a constant. The fits are nicely consistent with 0 with χ2/ν not entirely ridiculous.

Table 2: Standard Run List

  pT Blue pT Yellow xF Blue xF Yellow
χ2/ν 5.84297/8 12.6132/8 0.738318/2 3.04048/2
p0 0.00390914±0.0106192 0.00232259±0.0104973 0.00524585±0.0104579 0.00144557±0.0103348

The standard run list is listed for completion.

Table 3: Expanded Run List (xF > 0)

  AN δAN Stat δAN Total Syst δAN B.g. Asym Syst δAN Sig. Fit Param. Syst δAN Sig. Frac. Syst δAN Mass Window Syst
xF Bin 1 0.012212 0.017850 0.010259 0.00174349 0.000362491 0.00946841 0.00352438
xF Bin 2 0.006019 0.020885 0.012377 0.00784968 0.000406132 0.00383512 0.00875843
xF Bin 3 -0.063547 0.087256 0.063280 0.0371504 0.00785371 0.0268325 0.042925
pT Bin 1 0.085727 0.213076 0.107588 0.0665789 0.0803367 0.00682937 0.0253335
pT Bin 2 0.062019 0.039548 0.039101 0.001457 0.00169439 0.0381811 0.0081283
pT Bin 3 0.006376 0.024743 0.008915 0.00474474 0.00065043 0.00365669 0.00657067
pT Bin 4 0.008572 0.026375 0.011633 0.00688031 0.000596141 0.00379724 0.00855642
pT Bin 5 0.027594 0.033704 0.017403 0.00776646 0.000897156 0.00331615 0.0151901
pT Bin 6 -0.047122 0.050596 0.021576 0.0101659 0.00141715 0.00118251 0.018941
pT Bin 7 -0.033688 0.071861 0.010678 0.00994186 0.00127899 0.00292194 0.00223854
pT Bin 8 -0.063986 0.080860 0.038338 0.00895819 0.00364351 0.0166542 0.0331503
pT Bin 9 -0.321684 0.137853 0.097232 0.00735551 0.0187419 0.0687929 0.0656982

Table 4: Expanded Run List (xF < 0)

  AN δAN Stat δAN Total Syst δAN B.g. Asym Syst δAN Sig. Fit Param. Syst δAN Sig. Frac. Syst δAN Mass Window Syst
xF Bin 1 0.021464 0.017324 0.011019 0.00113386 0.000405259 0.0105663 0.00288512
xF Bin 2 0.011958 0.020066 0.010228 0.0051067 0.000373416 0.00354361 0.00811441
xF Bin 3 -0.014741 0.083672 0.071709 0.0240984 0.0020469 0.0070226 0.0671413
pT Bin 1 -0.410699 0.209872 0.396454 0.040821 0.355869 0.028678 0.167464
pT Bin 2 0.071202 0.038401 0.040705 0.000951909 0.0017483 0.0406437 0.00102834
pT Bin 3 0.004970 0.023930 0.016720 0.00310101 0.000241898 0.00153316 0.0163569
pT Bin 4 0.001866 0.025496 0.013393 0.00451158 7.15048e-05 0.000381961 0.0126039
pT Bin 5 0.038225 0.032536 0.012217 0.00504201 0.000991664 0.0096814 0.00539535
pT Bin 6 0.002348 0.049042 0.014921 0.00657971 8.28963e-05 0.000398211 0.0133854
pT Bin 7 -0.040124 0.069706 0.039458 0.00646131 0.00192194 0.000184882 0.0388774
pT Bin 8 0.051447 0.078591 0.073761 0.0058908 0.00328863 0.0121085 0.0724472
pT Bin 9 -0.054024 0.133909 0.042663 0.00479709 0.00321741 0.0175927 0.0384347

 

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