Run 2 Higgs differential cross section combination

This page is intended to collect relevant information for a future ATLAS+CMS Higgs differential cross section combination. Focus is given to analysis choices that, ideally, should be harmonised between the two experiments.

Previous LHC-HCG meetings and presentations

• LHC-HCG meeting 6 May 2020
• LHC-HCG meeting 29 May 2019

XSWG recommendations

Link to the main LHCHXSWG page on fiducial and differential cross sections: https://twiki.cern.ch/twiki/bin/view/LHCPhysics/LHCHXSWGFiducialAndSTXS

Recent talks on suggestions for differential observables:

• https://indico.cern.ch/event/882445/#16-full-status-report-of-h-dif
• https://indico.cern.ch/event/885279/#178-measurement-of-differentia

Summary tables

Observable binning below is given in the format bin1:bin2:bin3... for discrete variables and X1,X2,X3,X4,...XN for continuous variables.

H→ZZ→4l	ATLAS	CMS
Public results	HIGG-2018-29 (Submitted) 139 fb-1	HIG-19-001 (Published) 137 fb-1
Analysis contacts		tbc
Observables	Todo: add addtional observables
Higgs pT	0,10,20,30,45,60,80,120,200,350,1000	0,10,20,30,45,80,120,200,inf
Higgs rapidity	0.0,0.15,0.3,0.45,0.6,0.75,0.9,1.2,1.6,2.0,2.5	0.0,0.15,0.3,0.6,0.9,1.2,2.5
nJets	0:1:2:3-inf	0:1:2:3:4-inf
Leading jet pT	nJet=0:30,60,120,350	0,30,55,95,200,inf
Object definitions
Jets	pT > 30 GeV, |y| < 4.4 Add details on clustering algo, which particles are clustered, is STXS jet definition used etc.	pT > 30 GeV, |eta| < 2.5

H→gg	ATLAS	CMS
Public results		HIG-17-025 35.9 fb-1
Analysis contacts		Thomas Reitenspiess (thomas.reitenspiess@cernSPAMNOTNOSPAMPLEASE.ch), Simone Pigazzini (simone.pigazzini@cernSPAMNOTNOSPAMPLEASE.ch), Mauro Donega (mauro.donega@cernSPAMNOTNOSPAMPLEASE.ch)
Observables
Higgs pT	0,5,10,15,20,25,30,35,45,60,80,100,120,140,170,200,250,350,450, 1000	0,5,10,15,20,25,30,35,45,60,80,100,120,140,170,200,250,350,450,inf
Higgs rapidity	0,0.15,0.30,0.45,0.60,0.75,0.90,1.2,1.6,2.0,2.5	0.0,0.15,0.3,0.45,0.6,0.75,0.90,1.2,1.6,2.0,2.5
nJets	0:1:2:3-inf	0:1:2:3:4-inf
Leading jet pT	nJet=0,30,60,90,120,350,999	30,40,55,75,95,120,150,200,inf
Object definitions
Jets	pT> 30 GeV, |y|<4.4, STXS jet definition	pT > 30 GeV, |eta| < 2.5 pT > 30 GeV, |eta| < 4.7 STXS definition NOT used, clustering algo: anti-kt 0.4, neutrinos NOT included

H→WW	ATLAS	CMS
Public results		HIG-19-002 137 fb-1
Analysis contacts		tbc
Observables
Higgs pT		0,20,45,80,120,200,inf
nJets		0:1:2:3:4-inf
Object definitions
Jets		pT > 30 GeV, no eta restriction STXS definition is used, clustering algo: anti-kt 0.4, all final-state particles except from H decay & leptons from any V decay

H→bb	ATLAS	CMS
Public results	CONF-2018-052 (Preliminary) 80.5 fb-1	HIG-19-003 (Preliminary) 137 fb-1
Analysis contacts		Javier Duarte (javier.mauricio.duarte@cernSPAMNOTNOSPAMPLEASE.ch), Nick Smith (nick.smith@cernSPAMNOTNOSPAMPLEASE.ch), Martin Kwok (martin.kwok@cernSPAMNOTNOSPAMPLEASE.ch)
Observables
Higgs pT		300,450,650,inf
Object definitions
Higgs		Add details on Higgs definition used etc.

pT > 30 GeV, |eta| < 4.7

Todo: similar table for other channels?

-- AndrewGilbert - 2020-04-20