Observables
From Wiki Les Houches 09
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* Bruce | * Bruce | ||
* Rohini | * Rohini | ||
+ | * Kajari | ||
* Gudrun | * Gudrun | ||
* Vitaliano | * Vitaliano | ||
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with the gg-PDF needed for the tT production) | with the gg-PDF needed for the tT production) | ||
* cf. the discussion about Higgs systematics | * cf. the discussion about Higgs systematics | ||
- | ** ''Rohini, Bruce, Michael Dittmar, Guenther, Joey'' | + | ** ''Rohini, Bruce, Michael Dittmar, Guenther, Joey, Nikolas'' |
* Same as above, but '''normalization of Di-boson production''' | * Same as above, but '''normalization of Di-boson production''' | ||
- | ** ''Bruce'' | + | ** ''Bruce, Nikolas'' |
* '''Action item''' for these normalization studies: get numbers on exp. and theo. uncertainties for the Z (large pt) counting for a given int. lumi. | * '''Action item''' for these normalization studies: get numbers on exp. and theo. uncertainties for the Z (large pt) counting for a given int. lumi. | ||
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* detailed study of '''di-lepton (DY) Production, all relevant systematics''' | * detailed study of '''di-lepton (DY) Production, all relevant systematics''' | ||
- | ** ''Samir'' | + | ** ''Samir, Kajari'' |
---- | ---- | ||
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** example : sigma(W+>=3jets)/sigma(W+>=2jets), look at 3rd jet production as function of rap diff. of leading 2 jets | ** example : sigma(W+>=3jets)/sigma(W+>=2jets), look at 3rd jet production as function of rap diff. of leading 2 jets | ||
** Z+jet : analysis of hadronic part of event, such as event shapes | ** Z+jet : analysis of hadronic part of event, such as event shapes | ||
- | ** ''Jeppe,Vitaliano, Piergiulio, Alessandro'' | + | ** ''Jeppe,Vitaliano, Piergiulio, Alessandro,Joey'' |
---- | ---- | ||
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* discussion of '''relevant observables in QCD incl. jet production''' | * discussion of '''relevant observables in QCD incl. jet production''' | ||
** incl. cross section, ratio of di-jet production in diff. rap. bins | ** incl. cross section, ratio of di-jet production in diff. rap. bins | ||
+ | ** clear wish (high priority): '''obtain NLO+shower code for di-jet production''' | ||
** ''Paolo'' | ** ''Paolo'' | ||
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* discussion on '''observables involving photons''' | * discussion on '''observables involving photons''' | ||
- | ** W+gamma, gamma-gamma final states | + | ** W+gamma (comparison of available calc.), gamma-gamma final states |
** important issue: definition of isolation | ** important issue: definition of isolation | ||
- | ** ''Kajari, Susan'' | + | ** ''Kajari, Susan,Joey'' |
---- | ---- | ||
- | * establishment of '''Root Ntuples''' for easy use by experimentalists, containing all necessary info from LO/NLO codes output | + | * establishment of '''Root Ntuples''' for easy use by experimentalists, containing all necessary info from LO/NLO codes output, see subpage [[ROOT ntuples]] |
**'' Joey, Joanna,Frank-Peter'' | **'' Joey, Joanna,Frank-Peter'' | ||
+ | |||
+ | ---- | ||
+ | |||
+ | *'''comparison of NLO predictions (e.g. W + 3 jets) for different observables/scales''' in order to understand the uncertainties of scale choices/cross section results; using knowledge of existing NLO calculations to understand motivated scale choices at LO for uncalculated (to NLO) cross sections. Lit.: [http://arxiv.org/abs/0905.4739 Scale setting and resummation of logarithms in pp -> V + jets] | ||
+ | **''Joey, Nikolas, Giulia, Tanju...'' |
Current revision
Identifying/analyzing observables, ratios of observables, systematic uncertainties (renorm.scale, PDFs), obtaining cross sections from public codes/ntuples. The observables might involve both jets and leptons. Identify for which process/observable NLO calculations are available. What is suitable for start-up (eg. normalization issues, Drell-Yan, top, ...)
People signed up for this group:
- Bruce
- Rohini
- Kajari
- Gudrun
- Vitaliano
- Tanju
- Peter
- Frank-Peter
- Laura
- Giacinto
- Jon
- Matthew
- Matteo
- Nikolas
- Alessandro
- Joanna
- Lorenzo
- Jeppe
- Paolo
- Radja
- Reinhard
Contributions from several discussions so far
- Normalization of tT cross section, using Z and/or Z*, or Z at high pT (in order to enhance gluon contribution and thus reduce anti-correlation
with the gg-PDF needed for the tT production)
- cf. the discussion about Higgs systematics
- Rohini, Bruce, Michael Dittmar, Guenther, Joey, Nikolas
- Same as above, but normalization of Di-boson production
- Bruce, Nikolas
- Action item for these normalization studies: get numbers on exp. and theo. uncertainties for the Z (large pt) counting for a given int. lumi.
- detailed study of di-lepton (DY) Production, all relevant systematics
- Samir, Kajari
- discussions on ratios of cross sections in W/Z+jet production
- example : sigma(W+>=3jets)/sigma(W+>=2jets), look at 3rd jet production as function of rap diff. of leading 2 jets
- Z+jet : analysis of hadronic part of event, such as event shapes
- Jeppe,Vitaliano, Piergiulio, Alessandro,Joey
- discussion of relevant observables in QCD incl. jet production
- incl. cross section, ratio of di-jet production in diff. rap. bins
- clear wish (high priority): obtain NLO+shower code for di-jet production
- Paolo
- discussion on observables involving photons
- W+gamma (comparison of available calc.), gamma-gamma final states
- important issue: definition of isolation
- Kajari, Susan,Joey
- establishment of Root Ntuples for easy use by experimentalists, containing all necessary info from LO/NLO codes output, see subpage ROOT ntuples
- Joey, Joanna,Frank-Peter
- comparison of NLO predictions (e.g. W + 3 jets) for different observables/scales in order to understand the uncertainties of scale choices/cross section results; using knowledge of existing NLO calculations to understand motivated scale choices at LO for uncalculated (to NLO) cross sections. Lit.: Scale setting and resummation of logarithms in pp -> V + jets
- Joey, Nikolas, Giulia, Tanju...