1. Study of Hb`b, c`c and gg in the `H channel
Jianping Dai (SJTU)

2. Physics Motivation
To measure the BR of Higgs decay to b, c and gluon in the process of ee−ZH at 250GeV;

3. MC Samples and Cross Sections
The samples are from the full simulation (CEPC-V1);

4. Flavor tagging

5. ILC: 80<Mmiss<140 GeV/c2;
Missing mass of di-jet
ILC: 80<Mmiss<140 GeV/c2;

6. ILC: 20<PT<70 GeV/c;

7. PL
ILC: |PL|<60 GeV/c;

8. ILC: Pmax(Trk)<30 GeV/c;

9. NChaTrk
ILC: NChaTrk>10;

10. Y23
ILC: Y23<0.02;

11. Y12
ILC: 0.2<Y12<0.8;

12. ILC: 100<Mgg<130 GeV/c2;
Invariant mass of di-jet
ILC: 100<Mgg<130 GeV/c2;

14. Thanks

15. Cut Flows
Signal
`qq
lqq
Total Events
167676
757630
80<Mmiss<140 GeV/c2
149623/0.892
525499/0.694
369630/0.305
20<PT<70 GeV/c
135723/0.907
373849/0.711
260245/0.704
|PL|<60 GeV/c
133962/0.987
231522/0.619
211946/0.814
Pmax(Trk)<30 GeV/c
123731/0.924
190659/0.824
92218/0.435
NChaTrk>10
123324/0.997
183583/0.963
88093/0.955
Y23<0.02
89651/0.727
143147/0.780
19469/0.221
0.2<Y12<0.8
34967/0.390
88545/0.619
15648/0.804
100<Mgg<130 GeV/c2
30800/0.881
8123/0.0917
5816/0.372 
0.1837
The events efficiencies are estimated after the reconstruction of jets but before the Flavor-Tagging;