CSN1 21/9/2004F. Bradamante SITUAZIONE GENERALE RUN 2004 PROGETTI PER IL 2006 STATO ANALISI COMPASS: STATO DELL'ESPERIMENTO E DELL’ANALISI F. Bradamante CSN1 Assisi 21/9/2004

CSN1 21/9/2004F. Bradamante SITUAZIONE GENERALE Minute del SPSC e del RB SPSC - 27 aprile The Committee congratulates the Collaboration on the substantial progress achieved in detector performance and data analysis since it last reviewed the experiment. The Committee strongly supports the COMPASS request for adequate beam time in 2004, and considers that further data taking after the shutdown year 2005 is essential if the experiment is to achieve all its aims. The Committee considers it very important that the Collaboration continue to work with the highest priority towards the achievement of a measurement of ∆G/G as quickly as possible. The Committee will complete its recommendations concerning the proposed plans presented by COMPASS for its 2004 data taking at its next meeting when a clearer picture of progress this year overall is available. The Committee asks the Collaboration for a detailed running strategy for data taking after RB - 27 maggio The status of COMPASS / NA58 was reviewed. Substantial progress has been made by the collaboration, whose highest priority is an accurate measurement of DG/G. A hadron run has been proposed during 2004, but the decision on this has been deferred to the next SPSC meeting.

CSN1 21/9/2004F. Bradamante SITUAZIONE GENERALE

CSN1 21/9/2004F. Bradamante Preparazione del meeting dell’SPSC di Villars: soft&hard session 24/25 September 3 talk COMPASS muon physics after 2005 [beyond 2010] (contributo di Trieste) hadron physics after 2005 (contributo di Torino) future physics beyond 2010 e sette invitati COMPASS in preparazione, tre riunioni dedicate; 25 giugno, 2 luglio, 29 luglio SITUAZIONE GENERALE

CSN1 21/9/2004F. Bradamante RUN 2004

CSN1 21/9/2004F. Bradamante Nuovo 2004: GEM-11 BMS-6 W45 (2 st) Cinderella, etc… Non ancora installati: Si cold stations (run adronico) Spettrometro stabile … Detector trips : Straws, PDs, MMs R/O Errors : MTV err, evb crashes, Hotlink conn, Richcntr, etc… RUN 2004 Miglioramenti/completamenti: ECAL2, BMS, RICH, Straws, MM… DCS, DAQ

CSN1 21/9/2004F. Bradamante RICH methane missing pressure Reason: switch-over electro pneumatic valve did not work Actions taken: 1) air pressure increased; 2) 4 bottles in a row Water disaster on SM2 Reason : Cooling water hose broken Action taken : Hose replaced, new hoses ordered. Replacement of all hoses at latest in the 2 weeks stop in October. Lost target polarization Reason : apparent missing water pressure in BA82 Action taken : Processor reset. Report written. Gas alarm Reason : malfunction of the SDC mobile flammable gas detector (air pump) Action taken : detector to be replaced with a standard one. RUN problemi maggiori spettrometro

CSN1 21/9/2004F. Bradamante Reason: Detectors cracked during cool down Actions taken in Munich: Slower cool down Improved ELMB monitoring Many tests at Munich Plans Will arrive mid-September Get cold System operational at CERN in September Setup of cold system in beam in October Use Water filter from Cryogroup RUN Silicon cold station

CSN1 21/9/2004F. Bradamante SPS septum Scrubbing&25ns SPS septumSM2 H 2 O leak & pol n loss pol n loss ½ intensity RUN 2004

CSN1 21/9/2004F. Bradamante P1A: 111+ and 108- runs P1B: 44+ and 41- runs P1C: 201+ and 201- runs with 232 runs ½ intensity 146+ and 140- runs corrected for intensity P2A: 83+ and 87- runs Sum: 384+ and 376- runs 760 runs in total Longitudinal Running Mode 13.8 – 18.8: 80 runs with spin up in up cell 19.8 – 25.8: 72 runs with spin down in up cell 152 runs in total vs. 760 longitudinal, i.e. 20% so far Transversal Running Mode RUN statistica a fine agosto …

CSN1 21/9/2004F. Bradamante Da fascio  a fascio adroni Date : Oct.4, 8am – Oct.19, 4pm. Activities in the hall Removal of the solenoid and the DR Removal of 3He/4He, Warm-up, El. Cables, Pipes, Target material Installation of hadron run detectors Cedars, Veto Box, Primakoff hodo, Beam killers, Installation of cold silicon stations Removal, re-installation of warm stations, re-cabling, alignment, etc… Replacement of SM2 hoses, Instillation of RW Tests and Calibrations (with beam) Cedars – final tests needed, with 25 ns beam ECAL2 – calibration to be done with e- beam RICH – first tests with hadronshadron beam RICH – test of the APV read-outC4F10 required RUN run adronico

CSN1 21/9/2004F. Bradamante RUN run adronico SCHEDULA SPS

CSN1 21/9/2004F. Bradamante Due settimane per tutte le operazioni Schedula stretta 14 giorni in totale per fisica adronica SPIN 2004 RUN run adronico Planning

CSN1 21/9/2004F. Bradamante PROGETTI PER IL 2006 Possibili opzioni di run: adronico (Primakoff / central production) muoni protone (NH 3 ) muoni deutone ( 6 LiD)

CSN1 21/9/2004F. Bradamante Dai meeting del TB PROGETTI PER L’UPGRADE DELLO SPETTROMETRO - dal 2006 New PTM Rich Wall Torino, Dubna  D. Panzieri ECAL1 and ECAL2: completitionProtvino RICH1 : proposal for MAPMT read-out Trieste, Torino  S. Dalla Torre RICH1 : proposal for APV-based R/OTUM, Saclay, Trieste (supp. log.) Large size Drift ChamberSaclay SciFi: additional stationWarsaw Si: new cold stationMunich (TUM) DAQ upgrade

CSN1 21/9/2004F. Bradamante MAGNETE COMPASS dicembre 2003: firmato il MoU CERN/DAPNIA/COMPASS: finalizzazione della strumentazione test completi 2004: consegna a Saclay test di vuoto, raffreddamento, campo massimo, omogeneita’,… consegna al CERN 2005: installazione, tests, magnetic measurements, polarization

CSN1 21/9/2004F. Bradamante Accordo tra OD/COMPASS/CEA finalizzato Piani per test comuni OD/CEA a Saclay pronti Trasporto a Saclay: ~ fine settembre Test conclusi: ~ 5 settimane dopo l’arrivo a Saclay solenoide + dipolo + coils completamente assemblati MAGNETE COMPASS - 2

CSN1 21/9/2004F. Bradamante ECAL1 e ECAL2 ECAL1 L x H : 3.97 x 2.86 m2 Hole : 1.07 x 0.61 m2 OLGA : 143 x 143 mm2 GAMS : 38.2 x 38.2 mm2 ECAL2 L x H: 4.40 x 1.97 m2 Hole : 38.2 x 38.2 cm2 GAMS : 38.2 x 38.2 mm2 Mainz : 75 x 75 mm2 P/S : 38.2 x 38.2 mm GAMS Mainz OLG A GAMS P/S

CSN1 21/9/2004F. Bradamante ECAL: produzione centrale DistanceDistance ECAL1GAMSECAL2Acc  16 m34 m m-34 m0.36 Desiderabile aumentare l’accettanza per  con un “Wide Angle Electromagnetic Calorimeter” prima di SM1 ( Acc  ~ 0.95) From Donskov, Fut ECAL1 WAD Decadimento ηη -> 4γ

CSN1 21/9/2004F. Bradamante ECAL:  G mrad mrad D 0 *  D 0 + π 0 (simile a D ± *  D 0 + π ± ) selezionando π 0  2γ in ECAL

CSN1 21/9/2004F. Bradamante DCs: 3 Straws: 1 1/2 2x1/2 dopo SM DC1 DC2 Straws PTM COMPASS PTM SMC Lay-out previsto Lay-out 2002 ~ 200mrd Struttura come DC1/2/3. Cella: 7mm  9mm (OK per flusso). Dimensioni: Lint/lint = 2.89m/2.06m, Lext/lext = 3.36m/2.56m Mecanica OK Electronica: da decidere … Planning : 2006 possibile Large size Drift Chamber DC4

CSN1 21/9/2004F. Bradamante Hardware consolidation Replace many ROBs and EVBs Exchange old S-links, etc. Infrastructure,… Bandwidth upgrade : goal is to reach 100 MB/network link I/O software Network components Filter farm Aim : reduce hadron run data by an order of magnitude Speed : ms/event Proposed : Blade-server rack with 300 CPUs. Software DAQ software upgrades Filter upgrades Online software improvements Resources needed DAQ consolidation and Network : 335 kSF Filter farm: 720 kSF Manpower TMU not enough: help req Upgrade DAQ - per 2006

CSN1 21/9/2004F. Bradamante photon detectors in the central region : maPMT (HAMAMATSU R7600-M16-03) (HAMAMATSU R7600-M16-03) cathode replaced by a maPMT panel ~ 600 maPMT PRINCIPLE RICH1 maPMT

CSN1 21/9/2004F. Bradamante RICH1: APV read-out Partendo dall’idea di A. Colavita: Configurare il chip APV per leggere il RICH Parametri APV modificabili Segnale campionato tre volte Expected time resol : ~100 ns Catena R/O: APV  SGADC  Gesica Stato Carte prototipo pronte Tests in EHN2 a fine luglio Test da continuare settembre/ottobre

CSN1 21/9/2004F. Bradamante STATO ANALISI

CSN1 21/9/2004F. Bradamante ANALISI - ISTITUTI Trieste 45 kSi2k Torino 28 kSi2k GridKa 45 kSi2k Freiburg 17 kSi2k Saclay/Lyon (27 kSi2k) TUM 26 kSi2k Dubna & Protvino 43 kSi2k CERN production site! 120 kSi2k 1 Pentium IV 3GHz ~ 1 kSi2k

CSN1 21/9/2004F. Bradamante PRIMI RISULTATI DI FISICA (run 2002) presentati a Parigi, a DIS04, … A 1 d high p T Collins asymmetry ma ovviamente molto lavoro anche sugli altri canali:  G/G da open charm produzione di  con P T longitudinale e trasversa  q produzione di  e  asimmetria di Chan ricerca di pentaquark (  --,  + ) e sui dati 2003 e 2004 released

CSN1 21/9/2004F. Bradamante attivita’ di analisi 2004 / 2005 COMPASS TORINO Le attivita’ di analisi sono/saranno principalmente rivolte a: simulazioni MC in configurazione trasversa; l’analisi dei dati trasversi con produzione di lambda; simulazioni MC per effetto Primakoff; l’analisi dei dati del run adronico (in particolare Primakoff); l’analisi dei dati longitudinali con produzione di lambda e relativi MC COMPASS TRIESTE finalizzazione analisi dei dati 2002 con polarizzazione trasversa per la misura delle asimmetrie di Collins e Sivers analisi dei dati con polarizzazione trasversa per la misura di asimmetrie nella produzione di adroni, incluse produzioni MC relative, in collaborazione con Bonn Erlangen sviluppo/mantenimento software generale software RICH Primi test (indipendenti) di tools Grid: Torino: uso hardware per produzione MC Trieste: uso Alien per “catalogo”/accesso dati MC

CSN1 21/9/2004F. Bradamante ¾·2002 (25 “days”) FoM (*) ~ week(30) 2004 (5 “days”) FoM ~ 112 FoM 2004 ~ 4.5 · FoM 2002 (*) FoM=S/(1+B/S)  G/G: OPEN CHARM - SIGNAL & FoM

CSN1 21/9/2004F. Bradamante OPEN CHARM

CSN1 21/9/2004F. Bradamante Sonja Hedicke, Universität Freiburg, Analysis Meeting, CERN, August 2004 Data Selection Xcheck on 2003 data Q 2 > 1 GeV 2 asymmetries with some systematics 2002 data vs MC Gluon kinematics High-pt Analysis HIGH p t

CSN1 21/9/2004F. Bradamante Consecutive and global configuration Targetpolarisation P T ≈ 0.5 Strahlpolarisation P B ≈ 0.8 Dilutionfaktor f ≈ 0.4 Depolarisationsfaktor D ≈ 0.6 eventswithout Q 2 cut Q 2 > 1 GeV HIGH p t

CSN1 21/9/2004F. Bradamante PGF and Background need agreement between data and MC to entangle the contributions of the different subprocesses  MC studies, comparison with 2002 data PGF DIS L.O. QCD- Compton resolved Photon at low Q 2 HIGH p t

CSN1 21/9/2004F. Bradamante First A LL measurement from scale uncertainty of 65% not included p  + p   0 + X,  ~ 0 negative A LL difficult to accommodate in the framework of pQCD ! pQCD NLO predictions based on GRSV polarized PDFs ’03 data HIGH p t

CSN1 21/9/2004F. Bradamante HIGH p t

CSN1 21/9/2004F. Bradamante  G/G CON TUTTI I DATI DEUTERIO LE PREVISIONI SONO  (  G/G) = 0.05 da high p T all Q2  (  G/G) = 0.16 da high p T Q 2 >1 resolved   syst ?  (  G/G) = 0.24 da open charm

CSN1 21/9/2004F. Bradamante PRODUZIONE ESCLUSIVA ρ e  |t ’| < 0.5 GeV < W < 16 GeV Q 2 > GeV 2

CSN1 21/9/2004F. Bradamante 16 % of total 2002 statistics no MC corrections yet PRODUZIONE ESCLUSIVA ρ e 

CSN1 21/9/2004F. Bradamante p T > 0.15 GeV Q 2 > 0.05 GeV 2 PRODUZIONE ESCLUSIVA ρ and  ANGULAR DISTRIBUTIONS

CSN1 21/9/2004F. Bradamante If SCHC -> High precision measurement of spin density matrix element 2002 data (only) PRODUZIONE ESCLUSIVA DI ρ

CSN1 21/9/2004F. Bradamante 4 OTTOBRE per SPIN2004 NUOVI RISULTATI

CSN1 21/9/2004F. Bradamante Bressan A Results from COMPASS experiment (invited talk) Schill C Measurement of the gluon polarisation ΔG/G at the COMPASS experiment. Peshekhonov D Inclusive spin-dependent asymmetry A 1 (x,Q 2 ). Pagano P Measurements of Collins and Sivers asymmetries at COMPASS. Joosten R Tranversity signals in two pion correlation at COMPASS Ferrero A Spin observables in the μ N → μ' Λ X and μ N → μ' antiΛ X reactions at COMAPSS. Alexakhin V Longitudinal polarization of Lambda and antiLambda hyperons in deep- inelastic scattering at COMPASS. Friedrich J Transverse Lambda polarisation at COMPASS. Neyret D Results on exclusive ρ 0 production from COMPASS at CERN Gautheron F The COMPASS polarized target. Koivuniemi J Polarization build up in the large COMPASS 6 LiD target

CSN1 21/9/2004F. Bradamante PUBBLICAZIONI

CSN1 21/9/2004F. Bradamante - F. Bradamante, 2004 Int'l conference on Quarks and Nuclear Physics (QNP2004), Bloomington, USA, May , Plenary invited talk: "First Physics from COMPASS" - F. Bradamante, Advanced Studies Institute "Symmetries and Spin" (SPIN-PRAHA-2004), Prague, Czech Republic, July 5-10, 2004, invited talk: ”The COMPASS experiment at CERN” - F. Bradamante: International School of Nuclear Physics - 26th Course Erice, September 2004 "Highlights from the COMPASS experiment at CERN" - M. Colantoni: COMPASS Workshop on "Hadron Structure and Spectroscopy", Paris, March : ”Pion polarizabilities and diffractive Compass” - M. Colantoni: Advanced Studies Institute "Symmetries and Spin" (SPIN-PRAHA-2004), Prague, Czech Republic, July 5-10, 2004: ”Measurement of electric and magnetic polarizabilities with Primakoff COMPASS spectrometer” - A. Ferrero: BORMIO 2004, XLII International Winter Meeting on Nuclear Physics, Bormio, January 25 - February : ^ÓLambda COMPASS^Ô - A. Ferrero: Advanced Studies Institute "Symmetries and Spin" (SPIN-PRAHA-2004), Prague, Czech Republic, July 5-10, 2004: ”Soft hadronic interactions in the COMPASS experiment” PRESENTAZIONI A CONFERENZE (INFN)

CSN1 21/9/2004F. Bradamante (cont.) - A. Martin: COMPASS Workshop on "Hadron Structure and Spectroscopy", Paris, March : "Measurement of Transversity at COMPASS" - A. Martin: SIF, Brescia, Settembre 2004” “Misura della trasversalita’ al CERN e a RHIC” - A. Mielech: INPC 2004, Goteborg, Sweden, June 27 - July 3 “Determination of the gluon polarisation in COMPASS” Conferenze future: - A. Bressan: SPIN2004, Plenary invited talk, "Physics results from COMPASS" - A. Ferrero: SPIN2004 "Lambda COMPASS" - A. Kotzinian: SPIN2004 "Sivers effect in the target fragmentation region of SIDIS" - P. Pagano: SPIN2004 "Measurements of Collins and Sivers asymmetries at COMPASS" - F. Tessarotto: RICH PRESENTAZIONI A CONFERENZE (INFN)

CSN1 21/9/2004F. Bradamante