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The aim is to study various non-trivial observables of experimental interest/relevance with calculations implementing various different perturbative QCD approximations. There is a Rivet routine provided and all participating parties are encouraged in using it.
Collider: LHC@13TeV
PDF/as: MMHT2014nlo68clas118 (as(mZ)=0.118) (LHAPDF-id: 25200), MMHT2014nnlo68cl (as(mZ)=0.118) (LHAPDF-id: 25300), as applicable
Scales: muR/muF depending on calculation, of course. However, usually there is freedom on pp→h+0j level, thus please choose a scale that reproduces mH/2 in the 0j limit, eg. HT'/2 instead of HT' in pp→h+3j at fixed order. All other scales as needed.
mH: 125 GeV
GammaH: 0.00407 GeV (where applicable)
* renormalisation and factorisation scale uncertainty
* relevant parton shower / matching uncertainties (starting scale, other choices)
* merging scale uncertainties
List of Observables
Higgs boson momentum used below defined through the momentum of either a final state stable Higgs boson or the first pair of photons with an invariant mass of [124,126] GeV
jets (antikt, dR=0.4, pT>30 GeV, |eta|<4.4) in given incl./excl. multiplicity, input are all particles which do not constitute the Higgs boson above)
pT(h) in incl./excl. 0,1,2,3j bins
y(h) incl.
Jet multiplicities incl./excl. with pT>30,50 GeV
Jet veto (on j1) cross sections on 0j
Jet veto (on j2) cross sections on events with pT(j1)>30,50,100,200,500,1000 GeV
Jet veto (on j2) cross sections on events with pT(h)>50,100,200,500 GeV
pT(j) for nth jet in incl./excl. nj bins (n=1,2,3)
y(j) for nth jet in incl. nj bins
m(j1j2) invariant mass of leading jets in incl. 2j
dphi(j1,j2) rapidity separation of leading jets in incl. 2j
dphi(jfw,jbw) rapidity separation of forward-backward jets in incl. 2j
dy(j1,j2) rapidity separation of leading jets in incl./excl. 2/3j
dy(jfw,jbw) rapiditiy separation of forward-backward jet in inclk.excl. 2/3j
pT(j) for nth jet in incl. 2j (n=1,2,3) for dy(j1,j2)>1,2,3,4,5,6 of leading jets
pT(j) for nth jet in incl. 2j (n=1,2,3) for dy(jfw,jbw)>1,2,3,4,5,6 of forward-backward jet
pT(hj1) in incl. 1j
dphi(h,j1) in incl. 1j
dy(h,j1) in incl. 1j
pT(hj1j2) in incl. 2j
dphi(h,j1j2) in incl. 2j
dy(h,j1j2) in incl. 2j
dphi2 azimuthal angle between vector sum of jets forward and backward of the Higgs in incl. 2j
tau(j) transverse mass of the nth (n=1,2,3) jet weighted with the rapidity separation to the Higgs
sum_j tau(j) sum of all tau(j) (j=1,njet) with tau > 8 GeV
max_j tau(j) max of all tau(j) (j=1,njet) with tau > 8 GeV
cross section for dphi(h,j1j2)>2.6
only Higgs-constituting photon pair
cos(theta*) in all events and binned in pT(h) [0,80], [80,200], [200,infty]
dy(y1,y2) rapidity separation of photon pair
pTt
dR(y,j1), dR(y,j2) angular separation of leading and subleading jet and nearest photon
require the two leading to have m(jj)>400 GeV and dy(j,j)>2.8
Jet multiplicity incl./excl.
dphi(j1,j2) azimuthal separation of leading jets
central jet veto cross section in dependence on rapidity separation of leading jets
pT(h,j1j2)
dphi2 azimuthal angle between vector sum of jets forward and backward of the Higgs
cross section for dphi(h,j1j2)>2.6
require any pair of jets to have m(jj)>400 GeV and dy(j,j)>2.8
Jet multiplicity incl./excl.
dphi(j1,j2) azimuthal separation of leading jets
central jet veto cross section in dependence on rapidity separation of leading jets
pT(h,j1j2)
dphi2 azimuthal angle between vector sum of jets forward and backward of the Higgs
cross section for dphi(h,j1j2)>2.6
require the Higgs boson to be in between the leading jets in rapidity
Jet multiplicity incl./excl.
The current list is based on the interest expressed in the first meeting, please feel free to complete it with your planned contribution. Also, if you cannot contribute after all, please remove yourself from the list.
* Frank Petriello etal. pp→h+j @ NNLO
* Gionata Luisoni etal. pp→h+j, pp→h+jj, pp→h+jjj @ NLO
→ H+>=1 jet (pdf file) → H+>=2 jet (pdf file) → H+>=3 jet (pdf file)
* Simon Badger + GoSam Ntuples pp→h+(1,2)j @ nNLO and pp→h+(2,3)j @ nNLO
* The next rivet version will correctly calculate the statistical error in the presence of correlated weights. nTuple2Rivet. The analysis provided below already incorporates this feature into the current Rivet-2.2.1.
* Massimiliano Grazzini etal. pT(h) incl.
* Frank Tackmann etal. jet veto resummation on top of pp→h and pp→hj
* Stefan Hoeche etal. pp→h+jets (0@NNLO)
* Johannes Bellm, Simon Plaetzer, Peter Schichtel pp→h+jets (0,1,2@NLO)
* Marek Schoenherr etal. pp→h+jets (0,1,2,3@NLO)
* Rikkert Frederix, Eleni Vryonidou pp→h+jets (0,1,2@NLO)
* Jeppe Andersen etal. pp→h+jj+jets
There is a Rivet analysis provided to all interested parties. The routine is now finalised and can be used for production.
→ Analysis
To use it, download the file and remove the “.txt” ending. Then add Rivet to your path (conveniently through sourcing rivetenv.sh) and compile using
rivet-buildplugin RivetLHAnalysis.so mc_hjets_lh15.cc
then setting
export RIVET_ANALYSIS_PATH=$PWD
lets Rivet pick up the new library and Rivet is instructed to use it through the option
-a MC_HJETS_LH15
Let us know if you encounter any problems or bugs.