ggH contamination in VBF phase space
The technique of the study
The gluon fusion Higgs production enters the VBF phase space because of perturbative effects of the Higgs + 0jets generation, and because of higher order diagrams. A calculation is being performed with MCFM for the contribution of Higgs + 2jets at NLO, after the selections listed here below.
selections applied
| cut |
CMS |
ATLAS |
common |
| tag jets |
higest pT |
higest pT |
higest pT |
| jets num |
2 jets w pT > 30 GeV |
2 jets w pT > 25 GeV |
? |
| jets eta |
< 4.5 |
< 4.5 |
< 4.5 |
| Deta_jj |
> 3.5 |
> 3.8 |
? |
| M_jj |
> 450 GeV |
> 500 GeV |
? |
| etaProd_jj |
-- |
<0 |
? |
| additional jets veto |
no other jets with pT > 30 GeV between tag jets |
no other jets with pT > 25 GeV and eta < 3.2 |
? |
| leptons pT |
20, 10 GeV |
25, 15 GeV |
? |
| leptons eta |
< 2.5 |
< 2.5 |
< 2.5 |
cross sections obtained with POWHEG
results with ATLAS cuts
Results on POWEGH sample Summer11 ggHtoWW2L2nu with Atlas selections:
| mH |
eff |
eff uncertainty |
XSWG XS |
XSWG XS + uncertainty |
XSWG XS - uncertainty |
XSWG XS*eff |
| 120 |
0.00265471 |
0.00015556148 |
0.10809427 |
0.0212945719 |
0.016322235 |
0.00028695942 |
| 130 |
0.00317299 |
0.00017011534 |
0.19575323 |
0.03758462 |
0.029558738 |
0.00062112243 |
| 140 |
0.00398202 |
0.00019130307 |
0.27733405 |
0.0521388 |
0.041322773 |
0.0011043501 |
| 150 |
0.005073 |
0.00021530143 |
0.33313413 |
0.076645467 |
0.061489196 |
0.0016899907 |
| 160 |
0.0053296 |
0.00022441775 |
0.37475385 |
0.069704215 |
0.056213077 |
0.0019972875 |
| 170 |
0.0058839 |
0.00023585882 |
0.33866845 |
0.060621653 |
0.050461599 |
0.0019926917 |
| 180 |
0.0063824 |
0.0002416556 |
0.28548663 |
0.05167308 |
0.041966534 |
0.0018220894 |
| 190 |
0.00674216 |
0.00025089428 |
0.21064658 |
0.041497377 |
0.031807634 |
0.0014202123 |
| 200 |
0.00702772 |
0.00025365616 |
0.17679468 |
0.030408684 |
0.026872791 |
0.0012424635 |
| 210 |
0.00747327 |
0.00037000413 |
0.15521391 |
0.026231151 |
0.023747728 |
0.0011599556 |
| 220 |
0.00787373 |
0.00037987403 |
0.13916416 |
0.023379578 |
0.021292116 |
0.0010957409 |
| 230 |
0.00763706 |
0.00037407054 |
0.1257657 |
0.020877106 |
0.019493684 |
0.00096047994 |
| 250 |
0.00830834 |
0.00028107557 |
0.10553165 |
0.017412723 |
0.016462938 |
0.00087679311 |
| 300 |
0.0103101 |
0.00030774048 |
0.076182397 |
0.012798643 |
0.011808272 |
0.0007854498 |
| 350 |
0.0111827 |
0.00032063448 |
0.070856615 |
0.013958753 |
0.010486779 |
0.00079237061 |
| 400 |
0.0127372 |
0.00034245412 |
0.053755275 |
0.0084395782 |
0.0087621098 |
0.0006846903 |
| 450 |
0.0135938 |
0.00035395715 |
0 |
0 |
0 |
0 |
| 500 |
0.014549 |
0.00036636201 |
0.021072977 |
0.0037299169 |
0.0037088439 |
0.00030659128 |
| 550 |
0.0143944 |
0.00036438276 |
0 |
0 |
0 |
0 |
| 600 |
0.0154585 |
0.00037780998 |
0.0082862443 |
0.0016075314 |
0.0014832377 |
0.00012809274 |
results with CMS cuts
Results on POWEGH sample Summer11 ggHtoWW2L2nu with CMS selections:
| mH |
eff |
eff uncertainty |
XSWG XS |
XSWG XS + uncertainty |
XSWG XS - uncertainty |
XSWG XS*eff |
| 120 |
0.00379115 |
0.00018600502 |
0.10809427 |
0.0212945719 |
0.016322235 |
0.00040980164 |
| 130 |
0.00463674 |
0.00020579389 |
0.19575323 |
0.03758462 |
0.029558738 |
0.00090765742 |
| 140 |
0.00534598 |
0.00022180868 |
0.27733405 |
0.0521388 |
0.041322773 |
0.0014826217 |
| 150 |
0.00605488 |
0.0002353309 |
0.33313413 |
0.076645467 |
0.061489196 |
0.0020170857 |
| 160 |
0.00644816 |
0.00024698422 |
0.37475385 |
0.069704215 |
0.056213077 |
0.0024164714 |
| 170 |
0.00696481 |
0.00025674812 |
0.33866845 |
0.060621653 |
0.050461599 |
0.0023587612 |
| 180 |
0.00747341 |
0.00026163721 |
0.28548663 |
0.05167308 |
0.041966534 |
0.0021335577 |
| 190 |
0.00794777 |
0.00027256736 |
0.21064658 |
0.041497377 |
0.031807634 |
0.0016741704 |
| 200 |
0.00788232 |
0.00026875058 |
0.17679468 |
0.030408684 |
0.026872791 |
0.0013935522 |
| 210 |
0.00845516 |
0.00039375281 |
0.15521391 |
0.026231151 |
0.023747728 |
0.0013123585 |
| 220 |
0.00900115 |
0.00040638813 |
0.13916416 |
0.023379578 |
0.021292116 |
0.0012526368 |
| 230 |
0.00887353 |
0.00040346426 |
0.1257657 |
0.020877106 |
0.019493684 |
0.0011159862 |
| 250 |
0.0098078 |
0.00030561489 |
0.10553165 |
0.017412723 |
0.016462938 |
0.0010350339 |
| 300 |
0.0117557 |
0.00032884243 |
0.076182397 |
0.012798643 |
0.011808272 |
0.00089557901 |
| 350 |
0.0130556 |
0.00034676616 |
0.070856615 |
0.013958753 |
0.010486779 |
0.00092507659 |
| 400 |
0.0139827 |
0.00035902806 |
0.053755275 |
0.0084395782 |
0.0087621098 |
0.00075164431 |
| 450 |
0.0152759 |
0.00037553015 |
0 |
0 |
0 |
0 |
| 500 |
0.0168132 |
0.00039427839 |
0.021072977 |
0.0037299169 |
0.0037088439 |
0.00035430455 |
| 550 |
0.0167678 |
0.00039373613 |
0 |
0 |
0 |
0 |
| 600 |
0.0183138 |
0.00041180196 |
0.0082862443 |
0.0016075314 |
0.0014832377 |
0.00015175223 |
people involved from ATLAS (A), CMS (C), theory (T)
Sara Diglio (A), Biagio Di Micco (A), Raffaele Gerosa (C), Pietro Govoni (C), Andrea Massironi (C), Giulia Zanderighi (T)
--
PietroGovoni - 11-Nov-2011
temp 
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