Rungekutta in numbers
|
all inv. masses |
< 140 |
>= 150 |
raw data |
12524.5 |
11812.5 |
712.209 |
for comparison kickplane analysis:
http://hades-wiki.gsi.de/cgi-bin/view/SimAna/ResultsForINPC#Number_of_pairs
ths number of pairs in pi0 is lower, however above 150, the number of pairs is higher.
systematic errors SIMULATION (PLUTO)
1.
14% - PLUTO parametrization (variation of blast/isotropic/...) -> %$\sigma_{par}$%
2.
16% - %$\eta$% multiplicities - TAPS number -> %$\sigma_{\eta}$%
3.
11% - %$\pi^{0}$% multiplicities - TAPS number -> %$\sigma_{\pi^{0}}$%
%$\sigma_{sys}^{tot}$% = %$\sqrt{\sigma_{par}^{2} + \sigma_{\eta}^{2} + \sigma_{\pi^{0}}^{2}}$% = 24%
systematic errors EXPERIMENT
For the systematical error calculation the following errors are taken into account:
1.
11% - normalization to the %$\pi^{0}$% (charged pion analysis) -> %$\sigma_{\pi^{0}}$%
2.
10% - event mixing (background) -> %$\sigma_{CB}$%
3.
20% - self-consistency check of efficiency matrices/acceptances -> %$\sigma_{Eff}$%
%$\sigma_{sys}^{tot}$% = %$\sqrt{\sigma_{CB}^{2} + \sigma_{Eff}^{2}}$% = 22.36%
or if one take into acount also error coming from the %$\pi^{0}$%, then
%$\sigma_{sys}^{tot}$% = %$\sqrt{\sigma_{CB}^{2} + \sigma_{Eff}^{2} + \sigma_{\pi}^{2}}$% = 24.92%
Excess Function
%$\sigma_{ratio} = |\frac{EXP}{SIM}| \cdot \sqrt{ (\frac{\sigma_{EXP}}{EXP})^{2} + (\frac{\sigma_{SIM}}{SIM})^{2} } $%
yield in experiment in eta region: 1.25071e-07
yield in plutosim in eta region only from eta component 1.59329e-08
excess number yield_exp/yield_plutosim 7.84987
statistical error in eta region: 9.39296e-09
statistical error of ratio : 0.589534
systematical error in eta region 2.79659e-08
systematical error of ratio: 1.75523
statistical and systematical error in eta region 2.95011e-08
statistical and systematical error of ratio: 2.3158e-07
so the enhancement can be written in the following way:
7.85 +- 0.59(stat) +- 1.76(sys EXP)
for comparison here are the numbers from the kickplane analysis:
http://hades-wiki.gsi.de/cgi-bin/view/SimAna/ResultsForINPC#Excess_Function
--
YvonnePachmayer - 15 Oct 2007