MadGraph5_aMC@NLO

Poles do not cancel in SUSY NLO calculations

Asked by Denys

Dear experts,

I would like to calculate the cross section for pp > t t~ h3 process at NLO.

Referring to the previous question https://answers.launchpad.net/mg5amcnlo/+question/295771
I wonder what is the status of NLO for SUSY calculations now? Shall I still use loop_MSSM?

I tried

import loop_MSSM
generate p p > t t~ h3 [QCD]

and received

aMCatNLOError : Poles do not cancel, run cannot continue

I wonder if it is safe to ignore pole cancellation check in this case?

Kind regards,
Denys

Question information

Language:
English Edit question
Status:
Open
For:
MadGraph5_aMC@NLO Edit question
Assignee:
Hua-Sheng Shao Edit question
Last query:
Last reply:
Revision history for this message
Hua-Sheng Shao (erdissshaw) said : 		#1

Dear Denys,

Thanks for referring the previous question. The complete functionalities for calculating processes with NLO QCD corrections in the full MSSM model are still under developing but will merge quickly, which we aim at May to release it. It will include both the fully-fledged validated model on the FeynRules webpage and the on-shell subtractions to subtract the resonance diagrams. However, at the moment, we are not able to provide it especially if you want to include the Higgs sector. If you are only interested in the SUSY QCD part (i.e. gluino and squarks besides the SM particles), you can actually use susyqcd_ufo.tgz at http://feynrules.irmp.ucl.ac.be/wiki/NLOModels.

As already reminded by Valentin in https://answers.launchpad.net/mg5amcnlo/+question/295771, do not use loop_MSSM directly as there are SUSY counter term missing.

Best regards,

Hua-Sheng

Revision history for this message
Denys (denys-lontkovskyi) said : 		#2

Dear Hua-Sheng,

Thank you for the reply! I am interested in t \bar{t} production in association with CP-odd higgs. If NLO is under development at the moment, which model shall I use for LO calculations?

Kind regards,
Denys

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