Trigger Statistics Page


Trigger Statistics for Selected Modes in Two-photon Physics

New results from SP MC samples for two-photon -> pi0 pi0 (SP7622), eta pi0 (SP7623), and eta eta (SP7624)
SP9 MC sampleSP7622_Run6_OnSP7623_Run6_OnSP7624_Run6_On
Total number events:111000111000111000
Overall L1 efficiency97.159% +- 0.050%98.563% +- 0.036%99.495% +- 0.021%
Pure DCT1.284% +- 0.034%1.360% +- 0.035%1.241% +- 0.033%
Pure EMT97.050% +- 0.051%98.501% +- 0.036%99.449% +- 0.022%
Mixed13.320% +- 0.102%13.253% +- 0.102%11.692% +- 0.096%
Failed L12.841% +- 0.050%1.437% +- 0.036%0.505% +- 0.021%
Prescaled only0.062% +- 0.007%0.031% +- 0.005%0.013% +- 0.003%
Pure DCT only0.002% +- 0.001%< 0.003% (95% C.L.) < 0.003% (95% C.L.)
Pure EMT only81.101% +- 0.118%82.631% +- 0.114%84.942% +- 0.107%
Mixed only0.036% +- 0.006%0.027% +- 0.005%0.032% +- 0.005%
SP9 MC sampleSP7622_Run5_OnSP7623_Run5_OnSP7624_Run5_On
Total number events:224000224000224000
Overall L1 efficiency97.095% +- 0.035%98.576% +- 0.025%99.463% +- 0.015%
Pure DCT1.554% +- 0.026%1.635% +- 0.027%1.662% +- 0.027%
Pure EMT96.977% +- 0.036%98.487% +- 0.026%99.404% +- 0.016%
Mixed12.253% +- 0.069%12.490% +- 0.070%10.982% +- 0.066%
Failed L12.905% +- 0.035%1.424% +- 0.025%0.537% +- 0.015%
Prescaled only0.071% +- 0.006%0.049% +- 0.005%0.026% +- 0.003%
Pure DCT only0.005% +- 0.002%0.003% +- 0.001%0.001% +- 0.001%
Pure EMT only76.343% +- 0.090%68.837% +- 0.098%66.047% +- 0.100%
Mixed only0.027% +- 0.003%0.028% +- 0.004%0.023% +- 0.003%
SP8 MC sampleSP7622_Run5_OnSP7623_Run5_OnSP7624_Run5_On
Total number events:224000224000224000

Using Rainer's tool announced in this HN. Note that the Monte Carlo samples are generated privately unless noted/named after a SP-xxxx.

We require that all final state particles are within the detector acceptance. Here is the ACCEPTANCE CUTS:
CALORIMETER: energy > 0.020 GeV -0.780 < cos(theta) < 0.960
DRIFT CHAMBER: momentum > 0.080 GeV/c -0.930 < cos(theta) < 0.970

Conclusions

Looking at the charged final states, it looks like for run5 is more efficient than run4 in low W region. At high W regions, there is essentially no difference seen in the run4 and run5 configurations.