LHC Higgs Cross Section Working Group 1

13.6 TeV cross section updates

Instructions for 13.6 TeV cross section updates

Ad interim 13.6 TeV cross sections based on YR4 extrapolations

General information

Mailing list:	lhc-higgs-xsbr@cernNOSPAMPLEASE.ch use this link to subscribe.
Meetings	agenda

Group Conveners

Sub-working Group / Task-force Group Conveners

Road map and ongoing projects

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

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

Cross-group activities

Studies on parton shower uncertainties

GiovanniMarchiori - 2020-03-27