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LHC Higgs Cross Section Working Group 1

Green led General information

Mailing list: lhc-higgs-xsbr@cernNOSPAMPLEASE.ch
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Meetings agenda

Green led Group Conveners

Mail to conveners ATLAS CMS THEORY
Mail Roberto Di Nardo (Roma III) (12/2020) Julie Malclès (CEA, Paris-Saclay) (12/2020) John Campbell (Fermilab) Fabrizio Caola (Oxford)

Green led Sub-working Group / Task-force Group Conveners

Group TWiki Group Mailing List Mail to conveners ATLAS CMS THEORY
BR   Mail Daniela Rebuzzi (Pavia) Ivica Puljak (Split) Ansgar Denner (Würzburg) Sven Heinemeyer (IFCA) Alexander Mück (Aachen)
ggF   Mail Syed Haider Abidi (BNL) Andrea Massironi (Northeastern U) Bernhard Mistlberger (CERN) Emanuele Re (Annecy)  
VBF Mailing List Mail Antonio De Maria (Nanjing University) Yacine Haddad (Imperial College) Alexander Karlberg (Zurich) Simon Plaetzer (University of Vienna)  
VH Mailing List Mail Thomas Calvet (Stonybrook) Chris Palmer (Princeton) Ciaran Williams (Buffalo) Giancarlo Ferrera (University of Milan)  
ttH/tH Mailing List Mail Maria Moreno Llacer (IFIC, CSIC-U.Valencia), Josh McFayden (University of Sussex)( Joshuha Thomas-Wilsker (Chinese Academy of Sciences) Stefano Pozzorini (Zürich) Laura Reina (Florida)  
Offshell   Mail Lailin Xu (Brookhaven BNL) Ulascan Sarica (Univ. of California Santa Barbara) Nikolas Kauer (Royal Holloway) Raoul Roentsch (KIT, Karlsruhe)  

Green led Road map

Group ShortDescription Deliverables TimescaleSorted ascending Notes Status
ggF Uncertainties in kinematic regions Recommendation (LHCXSWG-INT-2017-001); Tool ---

It is a set of per-event weights, one for each source of uncertainty, to plug&play using the simplified/template cross section setup. Implemented everything in MINLO NNLOPS, being this the reference and the most up to date generator.

Re-weighting Powheg to NNLOPS is mandatory , since the uncertainties have been calculated with a given perturbative order, and if it is not matched with the generator, the result may be inconsistent.

Old STXS: done

In progress for new STXS
VH VH XS prediction and uncertainties in STXS framework Software tool providing central value and uncertainties + recommendations ---   In progress
VH V+hf modeling for VH(bb) [public note] MC comparison across several V+hf MC tools targeting VH(bb) phase space, guidelines for theory uncertainties on V+hf predictions ---   In progress, see here
VH ggZH merged predictions [potentially public note] Comparison between showered ggZH 0+1jet merged LO MC prediction, and ggZH LO prediction ---   not yet started
VBF PS uncertainties Study PS issues abroad wide range of relevant observables 2020

Public note with detailed benchmark study

systematic investigation of parton shower and matching uncertainties for VBF, Compare generators at NLO QCD matched with PYTHIA8 and HERWIG7 with NNLO 		In progress
ttH/tH tt+b-jets modelling Public note 2020 Provide the experiments with well-defined recommendations for the use of the corresponding Monte Carlo tools in experimental analyses In progress
ggF Boosted-Higgs cross-section recommendation Recommendation (LHCXSWG-2019-002) Fall 2019 Note available here and update here Done
VBF Higher-order corrections [potentially public note] >2020 --- Not started yet
VBF Jet multiplicities merging and Parton shower accuracy [potentially public note] >Summer 2020 --- In progress
ttH/tH tt+V (V=W,Z)->multi leptons modelling Potential public note November 2020 Comparison and harmonisation between experimental analysis tools, push theory calculations, and eventually provide the experiments with well-defined recommendations for the use of the corresponding Monte Carlo tools in experimental analyses In progress
Offshell Harmonise ATLAS/CMS/Theory Guiding documentations (public note on arXiv) November 2020 TWiki page: HiggsOffshellTaskForce
See here for the detailed plans: https://twiki.cern.ch/twiki/pub/LHCPhysics/HiggsOffshellTaskForce/task_force_info.pdf 		In progress
VBF STXS uncertainties Public tool, public note Spring/Summer 2020 --- In progress
VBF Higgs Boson Plus Dijets [potentially public note] Summer 2020 --- In progress

Green led Cross-group activities

Studies on parton shower uncertainties

GiovanniMarchiori - 2020-03-27

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Topic revision: r50 - 2021-03-04 - RobertoDiNardo
 
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