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Results

The results on the $F_2$ measurements are reported in the table 1. Using this table it's possible to go through each step of the analysis (and to make the always possible corrections). In fact the $x$, $y$ and $Q^2$ values, at which the $F_2$ is extracted, are shown with the width of each bin, the number of observed events and the unfolded ones, too. In addition to those data, the extracted born differential cross section (without systematics corrections) and the radiative contributions are written down. The reported $F_2$ values with their uncertainties (both type A and B) are corrected by systematic effects, as described in the previous note [1]. The overall normalisation uncertainty of $2 \%$ is not included in the quoted uncertainty. The used $F_L$ values are also shown. The full correlation matrix is printed in table 2 [6] (the values are expressed in percentage). The results, compared with the published 95 SVX data, are shown in figure 4 at different $Q^2$. A good agreement is obtained in all bins except for the highest $y$ bin at $Q^2 = 1.3$ GeV$^2$ and at $Q^2 = 6.$ GeV$^2$. In figure 5 the results are compared to some of the available data. The ZEUS NLO fit to data [3], made including the '95 official ZEUS shifted vertex data, is also shown (solid line).
Figure: Binning used in the analysis.
\begin{figure} \centerline{ \epsfig{figure=figure/bin.eps,clip=}} \end{figure}



Table: In the table are reported the principal steps of the analysis. $\delta$N, $\delta \sigma $ stay for type A uncertainties (``statistical'') while $\delta F_2$ is the total uncertainties (type A and B). The radiative corrections ($ \delta _{rc}$) and $F_L$ contribution ($\delta F_L$)are also reported.
  $ Q^{2}$   $y$ $x$   $ N_{obs.}$ $N_{unf.} \pm \delta N $ $ \frac{d^{2}\sigma_B }{dydQ^{2}} \pm \delta \sigma_B $ $F_{2}\pm \delta F_{2}$ $ \delta F_{L}$   $ \delta _{rc}$  
  $($GeV$^2 )$   $\;$  $\;$ $\;$ ( nb/GeV$^2 )$ $\;$ $(\%)$   $(\%)$  
  0.6 (0.75-0.45)  0.54 (0.61-0.46) 1.2 $10^{-5}$  903 4672$\pm$103 412.8$\pm$9.5 0.527$\pm$0.055 3.4  1.7  
  0.9 (1.08-0.75)  0.54 (0.61-0.46) 1.9 $10^{-5}$  1282 2884$\pm$54 227.5$\pm$4.4 0.677 $\pm$0.067 3.8  5.5  
   0.39(0.46-0.33) 2.6 $10^{-5}$  1588 3642$\pm$64 335.7$\pm$6.1 0.640 $\pm$ 0.045 1.7  3.6  
   0.28 (0.33-0.23) 3.6 $10^{-5}$  1167 3966$\pm$73 468.9$\pm$8.8 0.569 $\pm$ 0.036 0.08  5.2  
  1.3 (1.6-1.08)  0.54 (0.61-0.46) 2.8 $10^{-5}$  1596 2476$\pm$45 125.8$\pm$2.4 0.786 $\pm$ 0.076 4.28  3.4  
   0.39(0.46-0.33) 3.8 $10^{-5}$  1909 3275$\pm$52 184.9$\pm$3.1 0.748 $\pm$0.045 1.99  6.7  
   0.28 (0.33-0.23) 5.3 $10^{-5}$  1955 3755$\pm$60 271.9$\pm$4.5 0.694 $\pm$0.037 0.09  8.4  
   0.19 (0.23-0.14) 8.0 $10^{-5}$   2193 5063$\pm$74 407.4 $\pm$6.2 0.622 $\pm$ 0.029 0.04  7.3  
   0.09 (0.14-0.05) 1.6 $10^{-4}$  2030 9678$\pm$141 761$\pm$12 0.541 $\pm$ 0.027 0.0  5.3  
  1.9 (2.2-1.6)  0.54 (0.61-0.46) 3.9 $10^{-5}$  1617 1623$\pm$30 72.7$\pm$1.4 0.942 $\pm$ 0.090 5.5  2.3  
   0.39(0.46-0.33) 5.3 $10^{-5}$  1851 2164$\pm$36 105.4$\pm$1.8 0.859 $\pm$ 0.047 2.5  8.3  
   0.28 (0.33-0.23) 7.5 $10^{-5}$  1480 2371 $\pm$39 149.8$\pm$2.5 0.778$\pm$ 0.034 1.1  8.5  
   0.19 (0.23-0.14) 1.1 $10^{-4}$  1731 3181 $\pm$47 229.4$\pm$3.5 0.711 $\pm$0.028 0.5  4.7  
   0.09 (0.14-0.05) 2.2$10^{-4}$  1845 6371$\pm$92 428.6$\pm$6.7 0.609 $\pm$ 0.031 0.01  7.3  
  2.5 (3.0-2.2)  0.54 (0.61-0.46) 5.4 $10^{-5}$  1459 1397$\pm$28 43.0$\pm$0.88 1.020$\pm$0.088 5.2  11.6  
   0.39(0.46-0.33) 7.3 $10^{-5}$  1868 1590$\pm$27 61.8$\pm$1.1 0.930$\pm$0.049 2.4  1.8  
   0.28 (0.33-0.23) 1.0 $10^{-4}$  1818 1749$\pm$27 90.4$\pm$1.4 0.862$\pm$0.039 1.1  -.05  
   0.19 (0.23-0.14) 1.6 $10^{-4}$  1809 2431$\pm$35 134.6$\pm$2.0 0.781$\pm$0.029 0.4  2.4  
   0.09 (0.14-0.05) 3.0 $10^{-4}$  1759 4940$\pm$70 250.8$\pm$3.8 0.658$\pm$0.029 0.01  7.0  
  3.5 (4.0-3.0)  0.54 (0.61-0.46) 7.3 $10^{-5}$  1151 956$\pm$22 26.1$\pm$0.6 1.140$\pm$ 0.098 6.0  7.0  
   0.39(0.46-0.33) 9.8 $10^{-5}$  1474 1101$\pm$20 34.6$\pm$0.65 0.997$\pm$0.051 2.8  8.0  
   0.28 (0.33-0.23) 1.4 $10^{-4}$  1555 1334$\pm$22 51.5$\pm$0.9 0.913$\pm$0.038 1.2  6.7  
   0.19 (0.23-0.14) 2.1 $10^{-4}$  1792 1794$\pm$27 77.7$\pm$1.2 0.802$\pm$0.030 0.5  4.9  
   0.09 (0.14-0.05) 4.1 $10^{-4}$  1624 3464$\pm$51 140.5$\pm$2.2 0.682$\pm$0.037 0.01  7.2  
  4.5 (5.3-4.0)  0.54 (0.61-0.46) 9.3 $10^{-5}$  875 826$\pm$21 15.3$\pm$0.4 1.173$\pm$0.095 6.2  14.4  
   0.39(0.46-0.33) 1.3 $10^{-4}$  1200 921$\pm$18 21.5 $\pm$0.4 1.039$\pm$0.059 2.7  4.6  
   0.28 (0.33-0.23) 1.8 $10^{-4}$  1253 1055$\pm$19 31.5 $\pm$0.6 0.979$\pm$0.056 1.2  6.2  
   0.19 (0.23-0.14) 2.7 $10^{-4}$  1573 1418$\pm$23 46.4$\pm$0.8 0.859$\pm$0.036 0.05  7.0  
   0.09 (0.14-0.05) 5.2$10^{-4}$  1427 2663$\pm$42 81.8$\pm$1.4 0.706$\pm$0.039 0.01  9.9  
  6.0 (6.9-5.3)  0.54 (0.61-0.46) 1.2 $10^{-4}$  671 597$\pm$18 9.5$\pm$0.3 1.27$\pm$0.11 6.9  8.0  
   0.39(0.46-0.33) 1.7 $10^{-4}$  855 666$\pm$18 13.4$\pm$0.36 1.126$\pm$0.054 2.8  -0.13  
   0.28 (0.33-0.23) 2.4 $10^{-4}$  951 782$\pm$18 19.6$\pm$0.4 1.038$\pm$0.042 1.2  2.9  
   0.19 (0.23-0.14) 3.6 $10^{-4}$  1229 1099$\pm$20 29.3$\pm$0.6 0.915$\pm$0.038 0.05  6.9  
   0.09 (0.14-0.05) 7.0 $10^{-4}$  1139 2058$\pm$37 52.0$\pm$1.0 0.763$\pm$0.033 0.01  8.6  
  7.5 (8.2-6.9)  0.54 (0.61-0.46) 1.6 $10^{-4}$  341 335$\pm$12 6.37 $\pm$0.24 1.27$\pm$0.10 6.8  12.3  
   0.39(0.46-0.33) 2.1 $10^{-4}$  426 348$\pm$10 8.9$\pm$0.3 1.139$\pm$0.060 2.9  -3.4  
   0.28 (0.33-0.23) 3.0 $10^{-4}$  474 425$\pm$12 12.9$\pm$0.4 1.078$\pm$0.046 1.2  5.2  
   0.19 (0.23-0.14) 4.5 $10^{-4}$  570 539$\pm$13 18.4$\pm$0.4 0.901$\pm$0.042 0.05  3.5  
   0.09 (0.14-0.05) 8.7 $10^{-4}$  681 1095$\pm$25 34.6$\pm$0.8 0.794$\pm$0.030 0.01  6.8  
  9.0 (10.1-8.2)  0.54 (0.61-0.46) 1.9 $10^{-4}$  373 302$\pm$13 4.3$\pm$0.2 1.35$\pm$0.10 5.9  1.6  
   0.39(0.46-0.33) 2.5 $10^{-4}$  448 386$\pm$11 6.20$\pm$0.19 1.18$\pm$0.06 2.9  5.2  
   0.28 (0.33-0.23) 3.6 $10^{-4}$  471 426$\pm$11 8.3$\pm$0.2 0.996$\pm$0.047 1.2  11.7  
   0.19 (0.23-0.14) 5.0 $10^{-4}$  588 548$\pm$14 12.1$\pm$0.3 0.862$\pm$0.040 0.6  8.5  
   0.09 (0.14-0.05) 9.8$10^{-4}$  724 1159$\pm$26 23.4$\pm$0.6 0.776$\pm$0.029 0.1  13.2  
  12.0 (13.5-10.1)  0.54 (0.61-0.46) 2.5 $10^{-4}$  416 357$\pm$15 2.6$\pm$0.1 1.30$\pm$0.10 6.0  9.8  
   0.39(0.46-0.33) 3.4 $10^{-4}$  519 453$\pm$15 3.8$\pm$0.1 1.189$\pm$0.062 2.7  10.5  
   0.28 (0.33-0.23) 4.7 $10^{-4}$  551 479$\pm$13 5.35$\pm$0.15 1.063$\pm$0.052 1.2  7.9  
   0.19 (0.23-0.14) 7.2 $10^{-4}$  716 672$\pm$16 8.3$\pm$0.2 0.995$\pm$0.047 0.5  8.0  
   0.09 (0.14-0.05) 1.4 $ 10^{-3} $  828 1375$\pm$30 15.8$\pm$0.4 0.894$\pm$0.037 0.1  10.3  
  17. (20.-13.5)   0.54 (0.61-0.46) 3.5$\cdot 10^{-4}$   415 351 $\pm$15 1.33 $\pm$ 0.06 1.36$\pm$0.10 6.0  8.9  
   0.39(0.46-0.33) 4.8$\cdot 10^{-4}$   530 476 $\pm$ 16 1.89 $\pm$ 0.07 1.24$\pm$0.069 2.7   19.9  
   0.28 (0.33-0.23) 6.7$\cdot 10^{-4}$   589 481 $\pm$ 14 2.62 $\pm$ 0.08 1.08$\pm$0.056 1.2  13.3  
   0.19 (0.23-0.14) 1.0$\cdot 10^{-3}$   768 671 $\pm$ 16 3.98 $\pm$ 0.10 0.993$\pm$0.052 0.5  14.8  
   0.09 (0.14-0.05) 2.0$\cdot 10^{-3}$   769 1387 $\pm$ 32 7.84 $\pm$ 0.20 0.911$\pm$0.048 0.0   15.1  



next up previous
Next: Conclusions Up: An update of the Previous: Update
Giulio D'Agostini 2004-05-05