Process scan, to try and see what each of process is generating, and which should B and S really be.

SM processes (background)


g g > t t~ t t~ and g g > t t~ all, all > t t~ [QED,QCD default]

72 diagrams in the first case, with only gluons as intermediate particles. σ = 8.33 fb

17 diagrams in the second case. "all" is only gluons, so we're generating g g > t t~ g, (g > t t~) σ = 25.14 fb

process g g > t t~ t t~ g g > t t~ all, all > t t~
gg_tttt_diagram1.png yes yes
gg_tttt_diagram3.png yes yes
gg_tttt_diagram11.png yes no
gg_tttt_diagram12.png yes yes
gg_tttt_diagram17.png yes yes
gg_tttt_diagram18.png yes yes
gg_tttt_diagram67.png yes yes
gg_tttt_diagram68.png yes yes
It seems there is only one type of diagram (11) that is not present in g g > t t~ all, (all > t t~). However, in this case

there are way less "permutations" (why?)

g g > t t~ t t~ and g g > t t~ all, all > t t~ [QED = 99 ,QCD=99]

216 diagrams in the first case. Gluons, Z, photon and Higgs as intermidiates. Number of diagrams ~x4 with respect to default orders

16+8+8+8 diagrams in the second case. Now "all" is either g, z, a or h. So, g g > t t~ {a,z,h,g}, ({a,z,h,g} > t t~)

The diagram distribution is going to be similar to that in the table above, with Z, photons and higgs entering the processes now.

From this it seems that all the processes in g g > t t~ all, all > t t~ are contained in g g > t t~ t t~. Generating the latter should contain the former, so there is no need of adding both.

-- AlbertoGasconBravo - 2015-03-24

Topic attachments
I Attachment History Action Size Date Who Comment
Unknown file formateps diagrams_0_gg_ttxall_all_ttx.eps r1 manage 28.5 K 2015-03-24 - 10:18 AlbertoGasconBravo g g > t t~ all, (all > t t~)
Unknown file formateps diagrams_0_gg_ttxall_all_ttx_A99.eps r1 manage 20.0 K 2015-03-24 - 10:31 AlbertoGasconBravo g g > t t~ A, (A > t t~) QED=99 QCD=99
Unknown file formateps diagrams_0_gg_ttxall_all_ttx_G99.eps r1 manage 28.5 K 2015-03-24 - 10:32 AlbertoGasconBravo g g > t t~ G, (G > t t~) QED=99 QCD=99
Unknown file formateps diagrams_0_gg_ttxall_all_ttx_H99.eps r1 manage 20.0 K 2015-03-24 - 10:32 AlbertoGasconBravo g g > t t~ H, (H > t t~) QED=99 QCD=99
Unknown file formateps diagrams_0_gg_ttxall_all_ttx_Z99.eps r1 manage 20.0 K 2015-03-24 - 10:31 AlbertoGasconBravo g g > t t~ Z, (Z > t t~) QED=99 QCD=99
Unknown file formateps diagrams_0_gg_ttxttx.eps r1 manage 84.8 K 2015-03-24 - 09:57 AlbertoGasconBravo g g > t t~ t t~
Unknown file formateps diagrams_0_gg_ttxttx_99.eps r1 manage 229.1 K 2015-03-24 - 10:13 AlbertoGasconBravo g g > t t~ t t~ QED=99 QCD=99
PNGpng gg_tttt_diagram1.png r1 manage 14.7 K 2015-03-24 - 10:40 AlbertoGasconBravo  
PNGpng gg_tttt_diagram11.png r1 manage 6.6 K 2015-03-24 - 10:49 AlbertoGasconBravo  
PNGpng gg_tttt_diagram12.png r1 manage 6.5 K 2015-03-24 - 10:49 AlbertoGasconBravo  
PNGpng gg_tttt_diagram17.png r1 manage 6.5 K 2015-03-24 - 10:49 AlbertoGasconBravo  
PNGpng gg_tttt_diagram18.png r1 manage 6.8 K 2015-03-24 - 10:49 AlbertoGasconBravo  
PNGpng gg_tttt_diagram2.png r1 manage 7.2 K 2015-03-24 - 10:49 AlbertoGasconBravo  
PNGpng gg_tttt_diagram3.png r1 manage 7.8 K 2015-03-24 - 10:49 AlbertoGasconBravo  
PNGpng gg_tttt_diagram67.png r1 manage 10.3 K 2015-03-24 - 10:49 AlbertoGasconBravo  
PNGpng gg_tttt_diagram68.png r1 manage 10.0 K 2015-03-24 - 10:49 AlbertoGasconBravo  
Edit | Attach | Watch | Print version | History: r2 < r1 | Backlinks | Raw View | Raw edit | More topic actions...
Topic revision: r1 - 2015-03-24 - AlbertoGasconBravo
 
    • Cern Search Icon Cern Search
    • TWiki Search Icon TWiki Search
    • Google Search Icon Google Search

    Sandbox All webs login

  • Edit
  • Attach
This site is powered by the TWiki collaboration platform Powered by PerlCopyright &© 2008-2021 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
or Ideas, requests, problems regarding TWiki? use Discourse or Send feedback