"The Probability of an Electron Faking an Isolated Prompt Photon in CEM."

R. Culbertson, A. Pronko, Shin-Shan Eiko Yu

Fermilab

We determine the probability of an electron faking an isolated prompt photon in 
the central calorimeter. We also discuss a technique to significantly reduce the 
fake rate by matching a photon and a phoenix track. The probability of an 
electron faking a photon is obtained for electrons passing photon-like or 
standard electron ID cuts. The results are based on comparison of $Z\to e^{+}
e^{-}\gamma$ events in data and Monte Carlo. The rate is parametrized as 
$C(e^{p_{0}+p_{1}E_{T}}+p_{2})$, where the term $C$ accounts for differences in 
the tracking efficiency and amount of material in simulation and real detector. 



Posted to /cdf/pub/cdf8220_Ele2PhoFakeRate.pdf
    http://www-cdf.fnal.gov/cdfnotes/cdf8220_Ele2PhoFakeRate.pdf
(This is revision # 1.)

Posted by pronko