qqH;H->rr 肖虹 2009.02.19

content The result of six categories pi0-gamma discrimination： converted photons （with the method of zhangzhen）

divided into six categories Barrel，endcap R9 ：0.9，0.948

Six categories R9min=min(RecPho_r9[iselectedpho1],RecPho_r9[iselectedpho2]) Cat_0 two photons in barrel and R9min>0.948 Cat_1 two photons in barrel and 0.9<R9min<0.948 Cat_2 two photons in barrel and R9min<0.9 Cat_3 at least one photon in endcap and R9min>0.948 Cat_4 at least one photon in endcap and 0.9<R9min<0.948 Cat_5 at least one photon in endcap and R9min<0.9

Cat_0

Cat_1

Cat_2

Cat_3

Cat_4

Cat_5

Cat0 is the best

invariant mass of two photons in Six categories Select the biggest Significance(considered fluctuation in this part , I will show invariant mass of two photons with the same signal)

cat0

cat1

cat2

cat3

cat4

cat5

Number of events VBF rbox rborn Rjet—prompt Rjet-fake jets cat0 3548 31 2 61 14 6 cat1 3590 152 7 165 32 cat2 3531 51 10 40 15 cat3 3546 73 4 223 28 cat4 3520 87 8 168 48 cat5 3574 39 13 54 98 108

invariant mass of two photons in Six categories The same Signal

cat0

cat1

cat2

cat3

cat4

cat5

pi0-gamma discrimination： converted photons Signal（VBF） and jets