07012015:
TEST results is obtained:
1. no trigger electron requirement
2. require at least one tpctof electron another electron can be tpctof or tpcemc electron.

07022015:
change the pid cuts:
and rerun all the codes with more anaTree.root files

0704/2015:
tried to apply the dca<0.1 cm for the cases with HFT match:
however the dca cuts should be studied very detailed in the next step. it might be different for different pt bins

0712 and 0713 2015:
after the study of pair dca, decay length, pair e to e dca, mass, we tried to apply the pairCuts
in 07132 results, i change the dca cuts of TPC electron from dca<1cm to dca<3cm.  it does only improve a few percent of #j/psi, S/B and significance for BHT1.
No any improvement for BHT3 results.

0714 2015:
I changed TPC e dca<3cm.  and with pairDca<1.0, pairDecaylth<1.0, pairEEDca<1.0, 20>pairmass>0.2. the results is not good. 
then I changed pairDca<0.6, pairEEDca<0.6, then we get much more J/psi signals, and higher S/B, Significance in "ANA7142". it feels like 0.7cm might be the best cut.
when the same cuts as "ANA7142" was used to BHT1 data, we get much more than 600 J/psi signals, and two times of S/B of old results, now the Significance is 5.3 now. 

0715 2015
since zebo's final results did not use the BSMD, we tried to not use BSMC cuts on BHT2, we do get more J/psi signals, on the other hand we loose more S/B and the signal structure is not good as well，significance is also lower. so this suggests we need to use BSMD cuts.
from now on, I will keep this cuts.  

0716 2016
when we remove the nEta and nPhi >=2 cuts, but keep the zdist and phidist cuts, we get very at most more than 800 j/psi signals, with Significance 4.84 for BHT2 

with the cuts suggested by Mini Tree, we get more than 1000 J/psi signals right now. now i need to take a look at these cuts from previous data or embedding data. 

if we don't reject the photonic electrons, with the same cuts, we can also get very good results. as ANA81.pdf shows.