OPTIMISATION OF THE CUTS
Based on opt. MC samples (WPHACT: hee (h --> b b~) with 80 GeV mass for signal and eeqq~ for background)
No use of automatic methods: previously used cuts (Sept. meeting) nearly ok, some improvement in eff. with minor increase of bg moving smaller isol. cut from 8 to 4 degrees
CUT |
DEFINITION |
1 |
El. ident. |
2 |
2nd jet mult>1 |
3 |
Pcomb(fit)>1.E-20% |
4 |
Isjmin>4,Isjmax>15 |
5 |
Fast el. en.>40 GeV |
6 |
Fitted Mrec>50 GeV |
7 |
min(probp,probs)<0.3 |
See eff. vs bg. plot varying the btag cut
Data-MC comparison plots at 183 GeV. Plots at the left show data (err.bars), total b.g. (black line) and qq~ contribution (blue); at the right Higgs MC of 80 GeV (black line: preselection, yellow: final cut)