LHC Higgs Cross Section Working Group 1

Red led13.6 TeV cross section updates

Instructions for 13.6 TeV cross section updates

Ad interim 13.6 TeV cross sections

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) Bernhard Mistlberger (SLAC) Alexander Karlberg (CERN)

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

Group TWiki Group Mailing List Mail to conveners ATLAS CMS THEORY
ggF   Mail Syed Haider Abidi (BNL) Jonathon Langford (Imperial College) Alexander Huss (CERN) Stephen Jones (Durham)  
VBF Mailing List Mail Gaetano Barone (Brookhaven BNL) Stephane Cooperstein (UCSD) Mathieu Pellen (Freiburg) Simon Plaetzer (University of Vienna)  
VH Mailing List Mail Hannah Arnold (Nikhef) Alessandro Calandri (ETH Zurich) Ciaran Williams (Buffalo) Giancarlo Ferrera (University of Milan)  
ttH/tH Mailing List Mail Josh McFayden (University of Sussex) Sergio Sanchez Cruz (UZH) Malgorzata Worek (RWTH Aachen Univ.) Marco Zaro (University of Milan)  
Offshell   Mail Rafael Coelho Lopes de Sa (UMass Amherst) Savvas Kyriacou (JHU) Ennio Salvioni (Padua) Raoul Roentsch (KIT, Karlsruhe)  

Green led Road map and ongoing projects

Group ShortDescription Deliverables Timescale Notes Status

ggF PS uncertainties [potentially public note] >2021 Start looking at the new MiNNLOPS sample and use this as testbed to kick start some of the shower uncertainties studies Starting
ggF Uncertainties in kinematic regions

Recommendation (LHCXSWG-INT-2017-001); Tool

Working on a public note with the new recommendation with WG2

---

Summer 2021

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.

Recent progress: High-Pt results from WG1 (see next line) incorporated+ agreement reached on NP definition between ATLAS, CMS and theory community.

Old STXS: done

New STXS 1.2: In progress (finalizing the numbers)

VBF Higher-order corrections [potentially public note] 2021 A comparative study of Higgs boson production from vector-boson fusion report -- to be discussed at the next general meeting In progress
VH VH XS prediction and uncertainties in STXS framework Software tool + recommendations --- Goal: tool providing central value and uncertainties Initiated, see here
VH V+hf modeling for VH(bb) [potentially public note] 2021 Project ongoing for ATLAS and CMS comparisons: MC comparisons 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], initial results in les houches 2019 proceedings with sherpa setup here 2021 Comparison between showered ggZH 0+1jet merged LO MC prediction, and ggZH LO prediction. Initial results in Les Houche 2019 proceedings + being studied in ATLAS software In progress
ttH/tH tt+V (V=W,Z)->multi leptons modelling [potential public note] Summer 2021 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, already a substantial number of new developments from several groups (comparison of NLO MC, EW effects, off-shell effects) to be discussed in a sub-group meeting mid-June 2021 To be finalized


Green led Project outcomes

Boosted-Higgs cross-section recommendation : Public note LHCXSWG-2019-002

Parton shower uncertainties in VBF: Paper

STXS uncertainties in VBF: Public tool and note in preparation

Jet multiplicities merging and Parton shower accuracy in VBF: Paper

A comparative study of Higgs boson production from VBF: Report

Soft QCD effects, multi-parton interaction and colour reconnection in VBF: Paper

Off-shell Higgs Interpretations Task Force : Models and Effective Field Theories Subgroup Report: Public note

tt+b-jets modelling: Public note

Green led Cross-group activities

Studies on parton shower uncertainties

GiovanniMarchiori - 2020-03-27

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Topic revision: r69 - 2023-02-08 - RobertoDiNardo
 
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