A Test: Run 12059009

Analysis of Run-6, 200 GeV, tranverse-spin jets has given hints of interesting effects to provide access to transversity at higher x. Data collected in Run-12 should provide better statistics and better control of systematics to illuminate spin effects. Until Run-12 data are produced it would also be interesting to examine transverse spin jets at 500 GeV. To date no Run-11 500 GeV transverse jets have been produced. As a test, I chose a run from the middle of the 500 GeV transverse running (February 28). Borrowing from code Kevin has assembled to look at longitudinal jets and referring to code Pibero has assembled for running the anti-k_T algorithm, I have produced some simple QA histograms. As this is my first foray into jet physics, I need to get an idea of which cuts and triggers are appropriate as well as systematics to keep in mind. 

Fig. 1: Jet Histograms

Fig. 2: Tower Histograms

Fig. 3: Track Histograms

From Here

The next step seems to be a larger sample for the purposes of estimating sensitivity. Should sufficient statistics avail themselves, it is possible analyses beyond Collins and Sivers may be warranted, e.g. A_TT.

Details

Jet Algorithm

• Anti-k_T
• Cone Radius: 0.6
• AntiKtPars->setRecombinationScheme(StFastJetPars::E_scheme);
• AntiKtPars->setStrategy(StFastJetPars::Best);
• AntiKtPars->setPtMin(5.0);

Triggers

• AJP: 320603
• BBCMB: 320103
• BHT1: 320501
• BHT2: 320503
• BHTO*VPDMB: 320504
• JP0: 320600
• JP1: 320601
• JP2*L2JetHigh: 320602
• VPDMB: 320001

Cuts for 12-point Branch

• anapars12->useTpc  = true;
• anapars12->useBemc = true;
• anapars12->useEemc = true;
• anapars12->setTowerEnergyCorrection(new StjTowerEnergyCorrectionForTracksFraction(1.00));

TPC cuts

• anapars12->addTpcCut(new StjTrackCutFlag(0));
• anapars12->addTpcCut(new StjTrackCutNHits(12));
• anapars12->addTpcCut(new StjTrackCutPossibleHitRatio(0.51));
• anapars12->addTpcCut(new StjTrackCutDca(3));
• anapars12->addTpcCut(new StjTrackCutDcaPtDependent);
• anapars12->addTpcCut(new StjTrackCutChi2(0,4));
• anapars12->addTpcCut(new StjTrackCutPt(0.2,200));
• anapars12->addTpcCut(new StjTrackCutEta(-2.5,2.5));
• anapars12->addTpcCut(new StjTrackCutLastPoint(125));

BEMC cuts

• anapars12->addBemcCut(new StjTowerEnergyCutBemcStatus(1));
• anapars12->addBemcCut(new StjTowerEnergyCutAdc(4,3));
• anapars12->addBemcCut(new StjTowerEnergyCutEt(0.2));

EEMC cuts

• anapars12->addEemcCut(new StjTowerEnergyCutBemcStatus(1));
• anapars12->addEemcCut(new StjTowerEnergyCutAdc(4,3));
• anapars12->addEemcCut(new StjTowerEnergyCutEt(0.2));

Jet cuts

• anapars12->addJetCut(new StProtoJetCutPt(5,200));
• anapars12->addJetCut(new StProtoJetCutEta(-100,100));

Cuts for 5-point Branch

• anapars5->useTpc  = true;
• anapars5->useBemc = true;
• anapars5->useEemc = true;
• anapars5->setTowerEnergyCorrection(new StjTowerEnergyCorrectionForTracksFraction(1.00));

TPC cuts

• anapars5->addTpcCut(new StjTrackCutFlag(0));
• anapars5->addTpcCut(new StjTrackCutNHits(5));
• anapars5->addTpcCut(new StjTrackCutPossibleHitRatio(0.51));
• anapars5->addTpcCut(new StjTrackCutDca(3));
• anapars5->addTpcCut(new StjTrackCutDcaPtDependent);
• anapars5->addTpcCut(new StjTrackCutChi2(0,4));
• anapars5->addTpcCut(new StjTrackCutPt(0.2,200));
• anapars5->addTpcCut(new StjTrackCutEta(-2.5,2.5));

BEMC cuts

• anapars5->addBemcCut(new StjTowerEnergyCutBemcStatus(1));
• anapars5->addBemcCut(new StjTowerEnergyCutAdc(4,3));
• anapars5->addBemcCut(new StjTowerEnergyCutEt(0.2));

EEMC cuts

• anapars5->addEemcCut(new StjTowerEnergyCutBemcStatus(1));
• anapars5->addEemcCut(new StjTowerEnergyCutAdc(4,3));
• anapars5->addEemcCut(new StjTowerEnergyCutEt(0.2));

Jet cuts

• anapars5->addJetCut(new StProtoJetCutPt(5,200));
• anapars5->addJetCut(new StProtoJetCutEta(0.8,2.5));

Cuts for EMC Branch

• anaparsEMC->useTpc  = true;
• anaparsEMC->useBemc = true;
• anaparsEMC->useEemc = true;

TPC cuts

• anaparsEMC->addTpcCut(new StjTrackCutFlag(0));
• anaparsEMC->addTpcCut(new StjTrackCutNHits(1000000));

BEMC cuts

• anaparsEMC->addBemcCut(new StjTowerEnergyCutBemcStatus(1));
• anaparsEMC->addBemcCut(new StjTowerEnergyCutAdc(4,3));
• anaparsEMC->addBemcCut(new StjTowerEnergyCutEt(0.2));

EEMC cuts

• anaparsEMC->addEemcCut(new StjTowerEnergyCutBemcStatus(1));
• anaparsEMC->addEemcCut(new StjTowerEnergyCutAdc(4,3));
• anaparsEMC->addEemcCut(new StjTowerEnergyCutEt(0.2));

Jet cuts

• anaparsEMC->addJetCut(new StProtoJetCutPt(5,200));
• anaparsEMC->addJetCut(new StProtoJetCutEta(-100,100));

Gruesome, Gory Details

• Working Directory: /star/u/drach09/Run11/Jets/fromKevin
• Submission Script: scripts/submitJetTest

star-submit-template -template Run500GeVJetMaker.xml -entities 'TRGNAME=pp500_production_2011,runnumber=12059009'

• XML Script: scripts/Run500GeVJetMaker.xml
• Jet Finder Macro: RunJetFinder2009pro.C
• Jet Tree Reader: $STAR/StRoot/StJetMaker/macros/ReadJetTree2009.C