A.MagnonCOMPASS week, PRAGUE August 1 st -5 20051 COMPASS muon programme Alain Magnon DAPNIA/SPhN (CEA Saclay) On behalf of the COMPASS Collaboration.

COMPASS muon programme

Alain Magnon DAPNIA/SPhN (CEA Saclay) On behalf of the COMPASS Collaboration

Highlights about results, upgrades, prospects, - SPSC Villars meeting 22-28 Sept 2004 - SPSC71 meeting 3 May 2005 (G. Mallot) - SPSC72 meeting 5 July 2005 - Talks by Paolo P., Sonia H. & Alex K. (section 4) Vadim A. (section 5)

2006 & beyond ? Content

Report on the SPSC Villars Meeting

September 22-28 2004

John DaintonUniversity of Liverpool, GB

(on behalf of the SPSC)Villars 2004

Report on the SPSC Villars Meeting

September 22-28 2004

John DaintonUniversity of Liverpool, GB

(on behalf of the SPSC)FrameworkMachines and BeamsHeavy IonsNeutrinosSoft and Hard Protons Antiproton PhysicsFlavour PhysicsOther TopicsSummaryVillars 2004 COMPASSReport on the SPSC Villars meeting by John Dainton, University of Liverpool (CERN-SPSC-2005-010 SPSC-M-730 February 28th 2005, available on Web)

Bielefeld, Bochum, Bonn (ISKP, PI), Burdwan and Calcutta,CERN, Dubna (LPP, LNP), Erlangen, Freiburg, Lisbon, Mainz, Moscow (INR, LPI, MSU), Munich-LMU, Munich-TU, Nagoya, Prague (CU, CUT, TUL), Protvino,Saclay, Tel Aviv, Torino (Univ., INFN), Trieste (Univ.,INFN), Warsaw (SINS), Warsaw (TU)

More than 220 physicists from 28 Institutes COMPASS Collaboration

Physics programmeMuon beam programme

Quarks and gluon polarisation in polarised (longitudinal) nucleonsTransverse spin distributionLambda polarisationDiffractive vector-meson productionHadron structure and spectroscopyHadron beam programme

Polarisibility of pions and kaons (Primakoff reaction)Exotics q-states, glue ballsSemi-leptonic decays of charmed baryonsDouble charmed hadrons GPDs (DVCS, HEMP) - under consideration -Nicole dHose talkStephan Paul talk

SM1 dipoleSM2 dipolePolarised TargetHCAL1Muon-filter1,MW1SPS 160 GeV 2.108m/spillMicromegas,DC,SciFiGems,SciFi,DCs,strawsMWPC Gems Scifitrigger-hodoscopesSilicon Spectrometer 2002 -> 2004RICH_1Gem_11ECAL2,HCAL2straws,MWPC,Gems,SciFistrawsMuon-filter2,MW2 DW45SciFiVeto

COMPASS objectives Original programme set for about 5 years (1) of running at 150 days/year with 14.4s supercyle and eSPS = 80%. i.e. 7.2 105 spills/year i.e. 1019 PoT/year (2 108 m/spill) (1) HMC (4 years) - CHEOPS (2 years)

2002 2003 2004 Beam (1) 106days 90d 110dSPS+BL (2) .89 .63 .67Preparation ~30d 7d 3dSpectro(3) .77 .83 .87Data taking (4) 44d 39d 61dmuon (L/T) 33d/11d 30d/9d 47d/14d Data taking 2002 2004(1) Scheduled beam excluding MDs (4) L/T Longitudinal/Transverse sharing ~ 80/20(2) Inefficiency from SPS, beam line, etc(3) ~ 0.90 additional due to time needed to rotate spin and calibrate spectrometer 2004 19d

4d

15dhadron

Data taking 2002 - 2004muon: 2002 + 2003 + 2004 -> 11.6 105 spillsrequest: 7.2 105 spills/year 2.5 (proposal-year)Pilot hadron run: 2004 -> ~ 0.7 105 spillsWe got ~ 1.6 (proposal-year)

Highlights (SPSC71 status report) : - g1 - transversity - L polarisation -DG/G from high pT hadron pairs -DG/G from open-charm - more

Physics results

most precise measurement for 0.004 < x < 0.03 PLB 612 (2005) 154 new NLO QCD fit, precision of a0 improves factor 2 ( = 4 GeV2) g1 of the deuteron 2002-2003 data

single transverse-spin asymmetries (2002 data) - Collins: related to transverse quark distributions - Sivers : related to intrinsic kTPRL 94,202002 (2005) Towards transversity CollinsSiversh+h-

all asymmetries compatible with zeromeasure product of chiral-odd FF and transverse-PDF- is the analysing power of Collins FF small? or are the transverse parton distributions small? (proton-neutron cancellation in deuteron ?)try other polarimeters- interference FF of two hadrons- lambda polarisationQuark polarimeters

Theoretical work on Sivers SSAExtracting the Sivers function from polarized SIDIS data and making predictions

- Phenomelogical model whose parameters are constrained by HERMES proton measurements.

- COMPASS 2002 preliminary results for Sivers effect are in agreement with the model.

M. Anselmino et al. hep-ph/057181(including HERMES Prel. Results shown at DIS05)

Theoretical work on Sivers SSAM. Anselmino et al. hep-ph/057181Predictions of Sivers asymmetries on a proton target

Expected accuracy for Collins asymmetries

20022002-42006

Strategies to suppress background: 1) Open charm production: q = c unique, no background charm fragmentation, 1.2 D0 per event D0 -> K- + (BR 4%), D*+(~20%) -> D0 +

2) High-pT hadron pair production: q=u,d,s background from non PGF events & resolved g

pQCD scale set by: 1) > 4mc2 or 2) > (pt1+pt2)2G/G from Photon-Gluon Fusion Photon Gluon FusionLOW STAT.HIGH STAT.Needed since Q2 ~ 0

aLL : calculable partonic asymmetriesR : Monte-Carlo (Lepto/Phytia depending on Q2)Photon Gluon FusionLeading order ProcessQCD-Comptone, mNmeasuredh1h2G/G from high-pT hadron pair

Q2 < 1GeV2250000 evtsQ2 > 1GeV2 28000 evts

2002 and 2003 data- pT,1, pT,2 > 0.7 GeV, p2T,1 + p2T,2 > 2.5 GeV2,- for statistical reasons use A|| / D- D depolarisation factor,- exact formula used in analysis

high-pT hadron pairsQ21GeV2

more difficult than large Q2contributions from resolved photons- spin dependent structure of the photonperturbative part calculablenon-perturbative part:- min/max VMD scenarios (Glck, Reya, Sieg)- tuning of intrinsic kT partons in the photonnucleon parameters- tuning of fragmentation functions- tuning of intrinsic kT in nucleon

high-pT hadron pairs: Q2

G = 2.48G = 0.62G = 0.16Gluon polarisationG/G (xg 0.1) is smallGRSV2000NLO fits to g1m2 = 3 Gev2 DG>1 disfavoured

Open charm: Ds from D*srequiring the slow pion in D* D s K sD0 K 0

Gluon polarisation, D0 & D* events2002-2003 dataDG/G = -1.08 +/- 0.73 = 0.15 +/- 0.08

G = 2.48G = 0.62G = 0.16Gluon polarisationGRSV2000NLO fits to g1

2002 2004 -> 2006 FoM(DG/G)

s(DG/G)=1/FoM1/2

We work very hard to increase FoM FoM Figure of Merit for open charm

FoM increase in 2006 (with upgrades):

New COMPASS magnet: 1.3Rich upgrade: 1.5Ecal: 1.2K below threshold: 1.1100 days of beam: 1.3 -> (~ .9) total: 3.4 -> (~2.4) Figure of Merit for open charm

Large Angle Spectrometer 2002-3-4-6DCs: 3Straws: 1 1/2 21/2 end 2002 downstream of SM2.....DC1 DC2 DC4 StrawsCOMPASS PT solenoidSMC solenoidInitial lay-outModified~ 200 mrd~ 70 mrd

COMPASS Oxford Danfysik magnet OD magnet presently tested and instrumented in Saclay

Some delays ...

Magnet will be delivered to CERN in November

COMPASS OD magnet1st attempt to get uniform field (24.06): encouraging100 ppmRequest is 100 ppm

homognisation 89,93%, 90,1724%

-10957.3356499737-11025.0978162057

-4259.6292040819-4076.8432898284

-1405.1972280382-1309.5557522337

-232.1978325534-272.3235203422

88.075039934144.0523341729

108.092094464560.0713647812

52.044341779212.0142729562

0-24.0285459127

-28.0238763426-52.0618494773

-48.0409308731-52.0618494773

-40.034109061-36.0428188689

-8.0068218122-12.0142729564

20.0170545304-4.0047576521

24.02046543654.0047576519

-4.0034109061-8.0095153042

-8.0068218122-16.0190306085

0-12.0142729564

00

32.027287248828.0333035646

48.040930873148.057091825

60.051163591460.0713647812

40.034109060836.0428188687

012.0142729562

-32.0272872488-12.0142729564

-64.0545744975-44.0523341731

-64.0545744975-60.0713647814

-44.0375199669-48.0570918252

-8.00682181220

60.051163591452.0618494772

120.1023271827108.1284566064

100.085272652292.109425998

-224.1910107412-216.2569132129

-1281.0914899495-1285.5272063212

-4147.5336987113-4016.771925047

-10757.1651046692-10824.8599336013

+90% (1) 24_06

+90% (2) 24_06

Position cm

dB/Bo ppm

Homognisation

-90% after night 08_06

2.501Calibre 30mT2.501

Distance au centreDB (mT)B(T)Limite basse specLimite haute specppm of central field

-85-30.682.470322.5012300982.500729902-12259.1943957967

-80-13.042.487962.5012300982.500729902-5205.9592639685

-75-4.682.496322.5012300982.500729902-1863.2695983174

-70-1.132.499872.5012300982.500729902-443.8260202

-650.012.501012.5012300982.50072990211.9952978433

-600.222.501222.5012300982.50072990295.9623827461

-550.152.501152.5012300982.50072990267.9733544451

-500.062.501062.5012300982.50072990231.9874609154

-450.022.501022.5012300982.50072990215.9937304578

-400.022.501022.5012300982.50072990215.9937304578

-350.062.501062.5012300982.50072990231.9874609154

-300.12.50112.5012300982.50072990247.9811913731

-250.122.501122.5012300982.50072990255.9780566018

-200.112.501112.5012300982.50072990251.9796239874

-150.082.501082.5012300982.50072990239.9843261442

-1002.5012.5012300982.5007299027.9968652289

-5-0.012.500992.5012300982.5007299023.9984326144

0-0.022.500982.5012300982.5007299020

5-0.032.500972.5012300982.500729902-3.9984326144

10-0.152.500852.5012300982.500729902-51.9796239874

15-0.172.500832.5012300982.500729902-59.9764892161

20-0.22.50082.5012300982.500729902-71.9717870594

25-0.162.500842.5012300982.500729902-55.9780566018

30-0.062.500942.5012300982.500729902-15.9937304576

35-0.012.500992.5012300982.5007299023.9984326144

400.052.501052.5012300982.50072990227.9890283009

450.082.501082.5012300982.50072990239.9843261442

500.162.501162.5012300982.50072990271.9717870596

550.192.501192.5012300982.50072990283.9670849027

600.242.501242.5012300982.500729902103.9592479748

650.062.501062.5012300982.50072990231.9874609154

70-0.842.500162.5012300982.500729902-327.8714743821

75-3.662.497342.5012300982.500729902-1455.4294716471

80-10.722.490282.5012300982.500729902-4278.3228974242

85-25.82.47522.5012300982.500729902-10307.9592799621

1er essai homogeneisation avec un encadrement serre sur John.Mesure apres une 12h heures (G2 quasi nul)

+90,1724% 17_06

-2.505Calibre 30mT-2.505

Distance au centreDB (mT)B(T)Limite basse specLimite haute specppm of central field

-8527.15-2.47785-2.505390514-2.504889486-10893.6027527403

-8010.82-2.49418-2.505390514-2.504889486-4375.004989741

-753.53-2.50147-2.505390514-2.504889486-1464.9879847035

-700.64-2.50436-2.505390514-2.504889486-311.3598441605

-65-0.13-2.50513-2.505390514-2.504889486-3.9917928739

-60-0.2-2.5052-2.505390514-2.50488948623.9507572431

-55-0.1-2.5051-2.505390514-2.504889486-15.9671714953

-500-2.505-2.505390514-2.504889486-55.8851002339

-450.01-2.50499-2.505390514-2.504889486-59.8768931078

-400-2.505-2.505390514-2.504889486-55.8851002339

-35-0.09-2.50509-2.505390514-2.504889486-19.9589643692

-30-0.16-2.50516-2.505390514-2.5048894867.9835857478

-25-0.17-2.50517-2.505390514-2.50488948611.9753786215

-20-0.2-2.5052-2.505390514-2.50488948623.9507572431

-15-0.17-2.50517-2.505390514-2.50488948611.9753786215

-10-0.12-2.50512-2.505390514-2.504889486-7.9835857478

-5-0.11-2.50511-2.505390514-2.504889486-11.9753786216

0-0.14-2.50514-2.505390514-2.5048894860

5-0.16-2.50516-2.505390514-2.5048894867.9835857478

10-0.06-2.50506-2.505390514-2.504889486-31.9343429908

150.02-2.50498-2.505390514-2.504889486-63.8686859817

200.07-2.50493-2.505390514-2.504889486-83.8276503509

250.12-2.50488-2.505390514-2.504889486-103.7866147201

300.03-2.50497-2.505390514-2.504889486-67.8604788556

35-0.05-2.50505-2.505390514-2.504889486-35.9261358647

40-0.01-2.50501-2.505390514-2.504889486-51.8933073601

45-0.02-2.50502-2.505390514-2.504889486-47.9015144862

500-2.505-2.505390514-2.504889486-55.8851002339

55-0.08-2.50508-2.505390514-2.504889486-23.9507572431

60-0.19-2.50519-2.505390514-2.50488948619.9589643692

65-0.04-2.50504-2.505390514-2.504889486-39.9179287386

700.8-2.5042-2.505390514-2.504889486-375.228530142

753.65-2.50135-2.505390514-2.504889486-1512.8894991896

8010.82-2.49418-2.505390514-2.504889486-4375.004989741

8526.17-2.47883-2.505390514-2.504889486-10502.407051103

Mthode de monte du solnoide exprimentaleHomognisation aprs chauffage des trims a 90.00%,mise en route trim + montee a 90.1724%

+89,93% 17_06

-2.5Calibre 30mT-2.5

Distance au centreDB (mT)B(T)Limite basse specLimite haute specppm of central field

-8527-2.473-2.500320007-2.499819993-10827.696824489

-8010.87-2.48913-2.500320007-2.499819993-4375.8774754308

-753.52-2.49648-2.500320007-2.499819993-1435.9597931258

-700.67-2.49933-2.500320007-2.499819993-295.991712232

-65-0.1-2.5001-2.500320007-2.49981999311.9996640095

-60-0.15-2.50015-2.500320007-2.49981999331.9991040251

-55-0.05-2.50005-2.500320007-2.499819993-7.9997760063

-500.02-2.49998-2.500320007-2.499819993-35.9989920283

-450.05-2.49995-2.500320007-2.499819993-47.9986560376

-400.02-2.49998-2.500320007-2.499819993-35.9989920283

-35-0.03-2.50003-2.500320007-2.499819993-15.9995520125

-30-0.12-2.50012-2.500320007-2.49981999319.9994400156

-25-0.15-2.50015-2.500320007-2.49981999331.9991040251

-20-0.14-2.50014-2.500320007-2.49981999327.999216022

-15-0.12-2.50012-2.500320007-2.49981999319.9994400156

-10-0.06-2.50006-2.500320007-2.499819993-3.9998880032

-5-0.06-2.50006-2.500320007-2.499819993-3.9998880032

0-0.07-2.50007-2.500320007-2.4998199930

5-0.09-2.50009-2.500320007-2.4998199937.9997760063

100.02-2.49998-2.500320007-2.499819993-35.9989920283

150.11-2.49989-2.500320007-2.499819993-71.9979840564

200.15-2.49985-2.500320007-2.499819993-87.997536069

250.23-2.49977-2.500320007-2.499819993-119.9966400942

300.14-2.49986-2.500320007-2.499819993-83.9976480659

350.06-2.49994-2.500320007-2.499819993-51.9985440408

400.12-2.49988-2.500320007-2.499819993-75.9978720595

450.13-2.49987-2.500320007-2.499819993-79.9977600627

500.1-2.4999-2.500320007-2.499819993-67.9980960534

550.05-2.49995-2.500320007-2.499819993-47.9986560376

60-0.02-2.50002-2.500320007-2.499819993-19.9994400156

650.12-2.49988-2.500320007-2.499819993-75.9978720595

700.98-2.49902-2.500320007-2.499819993-419.9882403294

753.83-2.49617-2.500320007-2.499819993-1559.9563212229

8011.06-2.48894-2.500320007-2.499819993-4451.8753474903

8527-2.473-2.500320007-2.499819993-10827.696824489

Mthode de monte du solnoide 0-> 90.0893%Trim on (mme rglage que 90,1724%)back to 90.00%: pas excellentOn descend 89,93% (Trim G2 pas totalement annul)

+90.1747% 24_06

-2.498Calibre 30mT-2.498

Distance au centreDB (mT)B(T)Limite basse specLimite haute specppm of central field

-8527.5-2.4705-2.498119787-2.497620213-10957.3356499737

-8010.77-2.48723-2.498119787-2.497620213-4259.6292040819

-753.64-2.49436-2.498119787-2.497620213-1405.1972280382

-700.71-2.49729-2.498119787-2.497620213-232.1978325534

-65-0.09-2.49809-2.498119787-2.49762021388.0750399341

-60-0.14-2.49814-2.498119787-2.497620213108.0920944645

-550-2.498-2.498119787-2.49762021352.0443417792

-500.13-2.49787-2.498119787-2.4976202130

-450.2-2.4978-2.498119787-2.497620213-28.0238763426

-400.25-2.49775-2.498119787-2.497620213-48.0409308731

-350.23-2.49777-2.498119787-2.497620213-40.034109061

-300.15-2.49785-2.498119787-2.497620213-8.0068218122

-250.08-2.49792-2.498119787-2.49762021320.0170545304

-200.07-2.49793-2.498119787-2.49762021324.0204654365

-150.14-2.49786-2.498119787-2.497620213-4.0034109061

-100.15-2.49785-2.498119787-2.497620213-8.0068218122

-50.13-2.49787-2.498119787-2.4976202130

00.13-2.49787-2.498119787-2.4976202130

50.05-2.49795-2.498119787-2.49762021332.0272872488

100.01-2.49799-2.498119787-2.49762021348.0409308731

15-0.02-2.49802-2.498119787-2.49762021360.0511635914

200.03-2.49797-2.498119787-2.49762021340.0341090608

250.13-2.49787-2.498119787-2.4976202130

300.21-2.49779-2.498119787-2.497620213-32.0272872488

350.29-2.49771-2.498119787-2.497620213-64.0545744975

400.29-2.49771-2.498119787-2.497620213-64.0545744975

450.24-2.49776-2.498119787-2.497620213-44.0375199669

500.15-2.49785-2.498119787-2.497620213-8.0068218122

55-0.02-2.49802-2.498119787-2.49762021360.0511635914

60-0.17-2.49817-2.498119787-2.497620213120.1023271827

65-0.12-2.49812-2.498119787-2.497620213100.0852726522

700.69-2.49731-2.498119787-2.497620213-224.1910107412

753.33-2.49467-2.498119787-2.497620213-1281.0914899495

8010.49-2.48751-2.498119787-2.497620213-4147.5336987113

8527-2.471-2.498119787-2.497620213-10757.1651046692

+90.1747% 24_06 (2)

-2.497Calibre 30mT-2.497

Distance au centreDB (mT)B(T)Limite basse specLimite haute specppm of central field

-8527.5-2.4695-2.497279703-2.496780297-11025.0978162057

-8010.15-2.48685-2.497279703-2.496780297-4076.8432898284

-753.24-2.49376-2.497279703-2.496780297-1309.5557522337

-700.65-2.49635-2.497279703-2.496780297-272.3235203422

-65-0.14-2.49714-2.497279703-2.49678029744.0523341729

-60-0.18-2.49718-2.497279703-2.49678029760.0713647812

-55-0.06-2.49706-2.497279703-2.49678029712.0142729562

-500.03-2.49697-2.497279703-2.496780297-24.0285459127

-450.1-2.4969-2.497279703-2.496780297-52.0618494773

-400.1-2.4969-2.497279703-2.496780297-52.0618494773

-350.06-2.49694-2.497279703-2.496780297-36.0428188689

-300-2.497-2.497279703-2.496780297-12.0142729564

-25-0.02-2.49702-2.497279703-2.496780297-4.0047576521

-20-0.04-2.49704-2.497279703-2.4967802974.0047576519

-15-0.01-2.49701-2.497279703-2.496780297-8.0095153042

-100.01-2.49699-2.497279703-2.496780297-16.0190306085

-50-2.497-2.497279703-2.496780297-12.0142729564

0-0.03-2.49703-2.497279703-2.4967802970

5-0.1-2.4971-2.497279703-2.49678029728.0333035646

10-0.15-2.49715-2.497279703-2.49678029748.057091825

15-0.18-2.49718-2.497279703-2.49678029760.0713647812

20-0.12-2.49712-2.497279703-2.49678029736.0428188687

25-0.06-2.49706-2.497279703-2.49678029712.0142729562

300-2.497-2.497279703-2.496780297-12.0142729564

350.08-2.49692-2.497279703-2.496780297-44.0523341731

400.12-2.49688-2.497279703-2.496780297-60.0713647814

450.09-2.49691-2.497279703-2.496780297-48.0570918252

50-0.03-2.49703-2.497279703-2.4967802970

55-0.16-2.49716-2.497279703-2.49678029752.0618494772

60-0.3-2.4973-2.497279703-2.496780297108.1284566064

65-0.26-2.49726-2.497279703-2.49678029792.109425998

700.51-2.49649-2.497279703-2.496780297-216.2569132129

753.18-2.49382-2.497279703-2.496780297-1285.5272063212

8010-2.487-2.497279703-2.496780297-4016.771925047

8527-2.47-2.497279703-2.496780297-10824.8599336013

RICH (PDs) upgrade in 2006

RICH upgrade in 2006central region maPMT:multi-anode PMTslens systemMAD4 preampF1 TDCs, excellent time resolutionouter region APV:keep CsI photodetectornew readout based on APV chips good timing resolutionno DAQ dead time beam

RICH maPMTelements tested in T11 beamapproved by INFN in April, design of optics finished, PMs ordered (600)

delivery schedule Q3 2005 till Jan 2006

ready spring 2006Trieste, Turin + Bonn, Erlangen, Freiburg, Lisbon, Mainz, Prague (2)

APV RICH projectR/O successfully tested during 2004 on the Richinstallation and test Q1 /06

Trigger time x25nsdR, cmTU-Munich, Saclay Design based on GEM & Si FEE Provides signal timing accuracy

Large drift chamber DC4Chamber under construction by Saclayframes deliveredassembly and test Q4/05-Q1/06operational April 2006

Nouvel aimant de grande acceptance augmentation de langle solide

Run 2006 : cible COMPASS

180 mrad

70 mrad

DCs

Straws

Solnoide COMPASS

Solnoide SMC

2004

2006

DC4

ECAL1Plan to equip entire ECAL1 for 2006 (Protvino)Also beneficial for open- charmD0 K 0 D*0 D0 0s

SPS in 2006Schedule prepared by SPS Coordinator & proposed by SPSC

COMPASS - 2006 = 3440 h> 142 daysCOMPASS (2004)= 3120 h> 130 days 110(m) 20(h)

SPS in 2006Schedule was not accepted by CERN RB New (draft) schedule: COMPASS 2006 2728 h> 113 days (not 142 d) restart of SPS etc SPS+BL ~ 0.7 or lower

~ 0.5 proposal year

Conclusion muon programme was for ~2.5 years (SPS proposal-years) with 1.6 year of running, important physics results were obtained, also : - 3 physics papers (g1d, Collins/Sivers asym., penta-q search) - DG/G with remarkable precision from high pT low Q2 - s(DG/G) from D0 (0.73 -> 0.43 with 2004)

Conclusion Ambitious objective for 2006 Complete proposed muon programme - get error on DG/G from charm close to error of proposal, - run both with deuteron & proton target 1/ successful equipment upgrades 2/ sufficient beam allocation from SPS (?)

Additional slides

s(h1d,h1p) vs acceptanceSMC magnetCOMPASS magnet

Resolved photon contributionse.g.: qq qqPYTHIA

Example: kT tuningsystematic error- determined using 15 independent MC simulations- exploring the parameter space in kT of nucleon and photonfragmentation functionsparton shower on/off, renormalisation scalenucleonphoton

Data versus MCexcellent to good agreement for all kinematics variables

lets get

Data versus MCexcellent to good agreementfor all kinematics variables

lets get

xBj < 0.05, can neglect QCD Compton and LOLEPTO tuning la SMC high-pT

xpTphigh-pT hadron pairs: Q2>1GeV2

Open charm: MC studiesAROMA Monte Carlo, PGF onlybackground subtracted 2003 data (side bands)Ds indeed from PGF ? Data understood? good agreement data / MChard z-distributionzpTy

Open charm: MC studiesaLL from one hadron from PGF reconstructed

Correlation of generated and reconstructed aLL

Analysis uses event weighting with aLL deduced from hadron kinematic variables

RICH upgrade in 2006

Are now COMPASS data included in the fit?