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2019:groups:higgs:higgseft [2019/06/17 19:18]
ana_rosario.cueto_gomez
2019:groups:higgs:higgseft [2019/06/19 11:40] (current)
ana_rosario.cueto_gomez
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 **Project Description** **Project Description**
- 
-A preliminar set of topics that can be discussed are: 
- 
--> How does the inclusion of ggZH at NLO affects the parametrization of the STXS bins in terms of EFT parameters? https://​arxiv.org/​pdf/​1601.08193.pdf 
  
 -> Comparisons of SMEFTsim and SMEFTatNLO running both at LO to check the consistency -> Comparisons of SMEFTsim and SMEFTatNLO running both at LO to check the consistency
- +Especially for ttH and ZH-> the operators affecting these production channels will appear in ggZH. 
--> Understand what both tools include ​and agree on a "​wishlist"​ if important features are missing.+The definition of operators in the NLO model can be found in http://​feynrules.irmp.ucl.ac.be/​attachment/​wiki/​SMEFTatNLO/​definitions.pdf and in page 49 of https://​arxiv.org/​pdf/​1709.06492.pdf for the LO model. 
 +The main difference in the implementation is for complex operators, in SMEFT LO there is a phase and an absolute value whereas only one real value can be modified in the NLO model. 
 +    
 +-> Study of ggH and ggZH at NLO. Similar studies published:​ 
 +   ​https://​arxiv.org/​pdf/​1601.08193.pdf (ggZH, limited set of operators studied) 
 +   ​https://​arxiv.org/​pdf/​1708.00460.pdf (ggH) 
 +For the generation of the interference term we need to interfere tree level (from the EFT) with loop-induced processes (from the SM). Madgraph is not able to do it for the official versions, but some documentation ​on how to do it has been gathered: 
 +   ​https://​cp3.irmp.ucl.ac.be/​projects/​madgraph/​wiki/​LoopInducedTimesTree 
 +It can be also done using the reweighting module. 
 +Link to the STXT Rivet routine: 
 +   ​https://​gitlab.cern.ch/​LHCHIGGSXS/​LHCHXSWG2/​STXS/​Classification  
 +that also provides histograms of common kinematic variables
  
  
 **Interested Participants** **Interested Participants**
  
-María Moreno Llacer, Marco Delmastro, Ana Cueto, Nicolas Berger, Paolo Francavilla,​ Saskia Falke, Daniel de Florian, Mauro Donega, Add your name :)+María Moreno Llacer, Marco Delmastro, Ana Cueto, Nicolas Berger, Paolo Francavilla,​ Saskia Falke, Daniel de Florian, Mauro Donega, Josh McFayden, Add your name :)
2019/groups/higgs/higgseft.1560791896.txt.gz · Last modified: 2019/06/17 19:18 by ana_rosario.cueto_gomez