CSN1 21/9/2004 F. Bradamante
COMPASSCOMPASS: STATO DELL'ESPERIMENTO E DELL’ANALISI
F. Bradamante
• SITUAZIONE GENERALE• RUN 2004• PROGETTI PER IL 2006• STATO ANALISI
CSN1 Assisi 21/9/2004
CSN1 21/9/2004 F. Bradamante
COMPASSSITUAZIONE GENERALEMinute del SPSC e del RB
SPSC - 27 aprileThe 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 2005.
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 21/9/2004 F. Bradamante
COMPASSSITUAZIONE GENERALE
CSN1 21/9/2004 F. Bradamante
COMPASSSITUAZIONE GENERALEPreparazione 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
CSN1 21/9/2004 F. Bradamante
COMPASS
RUN 2004
CSN1 21/9/2004 F. Bradamante
COMPASSRUN 2004
Nuovo 2004:GEM-11BMS-6W45 (2 st)Cinderella, etc…
Non ancora installati: Si cold stations (run adronico)
Miglioramenti/completamenti:ECAL2, BMS, RICH, Straws, MM…DCS, DAQ
Spettrometro stabile …Detector trips :
Straws, PDs, MMsR/O Errors :
MTV err, evb crashes, Hotlink conn, Richcntr, etc…
CSN1 21/9/2004 F. Bradamante
COMPASSRUN 2004 - problemi maggiori spettrometro
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 SM2Reason : Cooling water hose brokenAction 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 BA82Action taken : Processor reset. Report written.
Gas alarmReason : malfunction of the SDC mobile flammable gas detector (air pump)Action taken : detector to be replaced with a standard one.
CSN1 21/9/2004 F. Bradamante
COMPASSRUN 2004 - Silicon cold station
Reason: Detectors cracked during cool down
Actions taken in Munich: Slower cool downImproved ELMB monitoringMany tests at Munich
PlansWill arrive mid-SeptemberGet cold System operational at CERN in SeptemberSetup of cold system in beam in OctoberUse Water filter from Cryogroup
CSN1 21/9/2004 F. Bradamante
COMPASSRUN 2004
0%
20%
40%
60%
80%
100%
120%P
1A19
.5.
28.5
.P
1B 9.6.
18.6
.25
.6.
P1C 2.7.
9.7.
16.7
.23
.7.
P2A
30.7
.6.
8.13
.8.
P2B
20.8
.27
.8.
P2C 3.9.
10.9
.17
.9.
24.9
.
P1A P1B P1C P2A P2B P2C
SPS Eff.COMPASS Eff.
SPS septum
Scrubbing&25ns
SPS septum SM2 H2O leak & poln loss
poln loss
½ intensity
CSN1 21/9/2004 F. Bradamante
COMPASSRUN 2004 - statisticaLongitudinal Running Mode
• 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- runs760 runs in total
Transversal 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
a fine agosto …
CSN1 21/9/2004 F. Bradamante
COMPASSRUN 2004 - run adronicoDa fascio µ a fascio adroni
Date : Oct.4, 8am – Oct.19, 4pm.
Activities in the hallRemoval of the solenoid and the DR
Removal of 3He/4He, Warm-up, El. Cables, Pipes, Target materialInstallation 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 beamECAL2 – calibration to be done with e- beamRICH – first tests with hadrons hadron beamRICH – test of the APV read-out C4F10 required
CSN1 21/9/2004 F. Bradamante
COMPASSRUN 2004 - run adronicoSCHEDULA SPS
CSN1 21/9/2004 F. Bradamante
COMPASSRUN 2004 - run adronicoPlanning
DayDate
Beam Pol TargetSiliconsHadron det.CedarsRICHECAL cal.
M2 Beam
Fri Sat Sun
Beam
Mon Tue Wed Thu Mon Tue Wed Thu Tue Wed ThuFri Sat Sun Mon
10/4 10/5 10/6 10/7 10/8 10/9 10/10 10/11 10/17 10/18 10/1910/12 10/13 10/14 10/15 10/22 10/23
Sun
25ns --- 25ns --- 25ns--- 25ns --- 25ns 158GeV --- 158GeV --- 158GeV
SatFri
10/20 10/2110/16
Mon Tue
10/24 10/25 10/26
TestsRICH C4F10 removal
Install
e-
----------- Detector installation ------------- Calib Calibra
Silicon installation and tests
Polarized Target removal
RICH
SPIN 2004
Due settimane per tutte le operazioniSchedula stretta14 giorni in totale per fisica adronica
CSN1 21/9/2004 F. Bradamante
COMPASS
PROGETTI PER IL 2006
Possibili opzioni di run:• adronico (Primakoff / central production)• muoni protone (NH3)• muoni deutone (6LiD)
CSN1 21/9/2004 F. Bradamante
COMPASSPROGETTI PER L’UPGRADE DELLO SPETTROMETRO - dal 2006Dai meeting del TB
DAQ upgrade
Munich (TUM)Si: new cold station
WarsawSciFi: additional station
SaclayLarge size Drift Chamber
TUM, Saclay, Trieste (supp. log.)RICH1 : proposal for APV-based R/O
Trieste, Torino S. Dalla TorreRICH1 : proposal for MAPMT read-out
ProtvinoECAL1 and ECAL2: completition
Torino, Dubna D. PanzieriRich Wall
New PTM
CSN1 21/9/2004 F. Bradamante
COMPASSMAGNETE COMPASS
dicembre 2003:firmato il MoU CERN/DAPNIA/COMPASS:
finalizzazione della strumentazionetest completi
2004: consegna a Saclay
test di vuoto, raffreddamento, campo massimo, omogeneita’,…
consegna al CERN
2005:installazione, tests, magnetic measurements, polarization
CSN1 21/9/2004 F. Bradamante
COMPASSMAGNETE COMPASS - 2
Accordo traOD/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 Saclaysolenoide + dipolo + coilscompletamente assemblati
CSN1 21/9/2004 F. Bradamante
COMPASSECAL1 e ECAL2
1.97
2.86 20 16
28
8
75
44
GAMS OLGAECAL1
L x H : 3.97 x 2.86 m2Hole : 1.07 x 0.61 m2OLGA : 143 x 143 mm2GAMS : 38.2 x 38.2 mm2
ECAL2L x H : 4.40 x 1.97 m2Hole : 38.2 x 38.2 cm2GAMS : 38.2 x 38.2 mm2Mainz : 75 x 75 mm2P/S : 38.2 x 38.2 mm2
3.97
36
24
68
5226
12
MainzGAMS
P/S
4.40
CSN1 21/9/2004 F. Bradamante
COMPASSECAL: produzione centrale
From Donskov, Fut. Phys@compass, 2002
ECAL1
WAD
Decadimento ηη -> 4γ
0.3634 m-11 m
0.18-34 m16 m
AccγECAL2GAMSECAL1Distance
Desiderabile aumentarel’accettanza per γ con un “Wide Angle Electromagnetic Calorimeter” prima di SM1(Accγ ~ 0.95)
CSN1 21/9/2004 F. Bradamante
COMPASSECAL: ∆G
200339 mrad
2006180 mrad
D0* D0 + π0
(simile a D±* D0 + π± )selezionando π0 2γ in ECAL
CSN1 21/9/2004 F. Bradamante
COMPASSLarge size Drift Chamber
Struttura come DC1/2/3.Cella: 7mm 9mm (OK per flusso).Dimensioni: Lint/lint = 2.89m/2.06m, Lext/lext = 3.36m/2.56m
DCs: 3 Straws: 1 1/2 2x1/2
dopo SM2
.....
DC1 DC2 Straws
PTM COMPASSPTM COMPASS
PTM SMCPTM SMC
Lay-out previsto
Lay-out 2002
~ 200mrd
Mecanica OK Electronica: da decidere … Planning : 2006 possibile
DC4
CSN1 21/9/2004 F. Bradamante
COMPASSUpgrade DAQ - per 2006
SoftwareDAQ software upgradesFilter upgradesOnline software improvements
Resources neededDAQ consolidation and Network : 335 kSFFilter farm : 720 kSF
ManpowerTMU not enough: help req
Hardware consolidationReplace many ROBs and EVBsExchange old S-links, etc.Infrastructure,…
Bandwidth upgrade : goal is to reach 100 MB/network link
I/O software Network components
Filter farmAim : reduce hadron run data by an order of magnitudeSpeed : 100-200 ms/event Proposed : Blade-server rack with 300 CPUs.
CSN1 21/9/2004 F. Bradamante
COMPASSRICH1 maPMT
photon detectors in the central photon detectors in the central region : region : maPMTmaPMT
(HAMAMATSU R7600(HAMAMATSU R7600--M16M16--03)PRINCIPLE
03)
cathode replaced by cathode replaced by a a maPMTmaPMT panelpanel
~ 600 ~ 600 maPMTmaPMT
CSN1 21/9/2004 F. Bradamante
COMPASSRICH1: APV read-out
Partendo dall’idea di A. Colavita:Configurare il chip APV per leggere ilRICH
Parametri APV modificabili
Segnale campionato tre volte Expected time resol : ~100 ns
Catena R/O:APV SGADC Gesica
StatoCarte prototipo pronteTests in EHN2 a fine luglioTest da continuare settembre/ottobre
CSN1 21/9/2004 F. Bradamante
COMPASS
STATO ANALISI
CSN1 21/9/2004 F. Bradamante
COMPASSANALISI - ISTITUTI
Trieste 45 kSi2kTorino
28 kSi2k
GridKa 45 kSi2k
Freiburg 17 kSi2k
Saclay/Lyon (27 kSi2k)
TUM 26 kSi2k
Dubna & Protvino 43 kSi2k
CERNproduction site!
120 kSi2k
1 Pentium IV 3GHz ~ 1 kSi2k
CSN1 21/9/2004 F. Bradamante
COMPASSPRIMI RISULTATI DI FISICA (run 2002)
presentati a Parigi, a DIS04, …• A1
d
• high pT
• Collins asymmetry
ma ovviamente molto lavoro anche sugli altri canali: • ∆G/G da open charm• produzione di Λ con PT longitudinale e trasversa • ∆q • produzione di ρ e φ• asimmetria di Chan• ricerca di pentaquark (Σ--, θ+)e sui dati 2003 e 2004
released
released
CSN1 21/9/2004 F. Bradamante
COMPASSattivita’ di analisi 2004 / 2005
COMPASS TORINOLe 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 2002-2003-2004 con produzione di lambda e relativi MC
COMPASS TRIESTEfinalizzazione analisi dei dati 2002 con polarizzazione trasversa per la misura delle asimmetrie di Collins e Sivers analisi dei dati con polarizzazione trasversa 2002-2004 per la misura di asimmetrie nella produzione di adroni, incluse produzioni MC relative, in collaborazione con Bonn Erlangensviluppo/mantenimento software generalesoftware RICH
Primi test (indipendenti) di tools Grid:Torino: uso hardware per produzione MCTrieste: uso Alien per “catalogo”/accesso dati MC
CSN1 21/9/2004 F. Bradamante
COMPASS∆G/G: OPEN CHARM - SIGNAL & FoM
1 week(30) 2004 (5 “days”)FoM ~ 112
¾·2002 (25 “days”)FoM(*) ~ 120
FoM2004 ~ 4.5 · FoM2002(*)FoM=S/(1+B/S)
CSN1 21/9/2004 F. Bradamante
COMPASSOPEN CHARM
CSN1 21/9/2004 F. Bradamante
Sonja Hedicke, Universität Freiburg,Analysis Meeting, CERN, August 2004
•Data Selection•Xcheck on 2003 data•Q2 > 1 GeV2 asymmetrieswith some systematics
•2002 data vs MC•Gluon kinematics
µr 'µ
Pr
q
qg
γ
High-pt Analysis
COMPASSHIGH pt
CSN1 21/9/2004 F. Bradamante
COMPASSHIGH pt
Consecutive and global configuration
+−
−+−
==→
''
''*
21
du
du
du
du
BT
dhhd
LL
NNNN
NNNN
fDPPA
DA γ
µ
BN
i iN
i i
N
i iN
i iN
i iN
i i
N
i iN
i i
T
d fDPwww
ww
ww
wwP
Adu
du
du
du
=
+
−−
+
−=
∑∑∑∑
∑∑∑∑ with,
21
''
''
2222*γ
Targetpolarisation PT ≈ 0.5Strahlpolarisation PB ≈ 0.8Dilutionfaktor f ≈ 0.4Depolarisationsfaktor D ≈ 0.6
224702553132003
68231119532002
Q2 > 1 GeV2without Q2 cutevents
CSN1 21/9/2004 F. Bradamante
COMPASSHIGH pt
PGF and Background
PGF QCD-ComptonDIS L.O.
resolvedPhoton
at low Q2
need agreement between data and MC to entangle the contributionsof the different subprocesses MC studies, comparison with 2002 data
CSN1 21/9/2004 F. Bradamante
COMPASSHIGH pt
First ALL measurement from
scale uncertainty of 65%not included
p↑ + p↑ → π0 + X, η ~ 0
’03 data
GG
GGALL
∆⊗
∆~
pQCD NLO predictionsbased on GRSVpolarized PDFs
negative ALL difficult toaccommodate in the framework of pQCD !
CSN1 21/9/2004 F. Bradamante
COMPASSHIGH pt
CSN1 21/9/2004 F. Bradamante
COMPASS∆G/G
CON TUTTI I DATI DEUTERIO 2002-2004LE PREVISIONI SONO
σ(∆G/G) = 0.24 da open charm
σ(∆G/G) = 0.05 da high pT all Q2σ(∆G/G) = 0.16 da high pT Q2>1
resolved γσsyst ?
CSN1 21/9/2004 F. Bradamante
COMPASSPRODUZIONE ESCLUSIVA ρ e φ
|t ’| < 0.5 GeV2
7.5 < W < 16 GeVQ2 > 10-3GeV2
CSN1 21/9/2004 F. Bradamante
COMPASSPRODUZIONE ESCLUSIVA ρ e φ
• 16 % of total 2002 statistics
• no MC corrections yet
CSN1 21/9/2004 F. Bradamante
COMPASSPRODUZIONE ESCLUSIVA ρ and φANGULAR DISTRIBUTIONS
pT > 0.15 GeV Q2> 0.05 GeV2
CSN1 21/9/2004 F. Bradamante
COMPASSPRODUZIONE ESCLUSIVA DI ρ
If SCHC ->High precision measurement of spin density matrix element
2 (GeV/c)2Q-210 -110 1 10
-0.5
0
0.5
1
1.5
2
2.5
3
3.5
4COMPASS PRELIMINARY
TσLσ
R =
2 (GeV/c)2Q-210 -110 1 10
-0.5
0
0.5
1
1.5
2
2.5
3
3.5
4COMPASS PRELIMINARYZEUSH1E665
TσLσ
R =
2 (GeV/c)2Q-210 -110 1 10
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
= 10 GeVWCOMPASS PRELIMINARY
0004r
2 (GeV/c)2Q-210 -110 1 10
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
= 10 GeVWCOMPASS PRELIMINARY = 55/80 GeVWZEUS = 70 GeVWH1 = 18 GeVWE665
0004r
2002 data (only)
CSN1 21/9/2004 F. Bradamante
COMPASS
4 OTTOBRE per SPIN2004
NUOVI RISULTATI
CSN1 21/9/2004 F. Bradamante
COMPASS
Bressan A Results from COMPASS experiment (invited talk)
Schill C Measurement of the gluon polarisation ∆G/G at the COMPASS experiment.
Peshekhonov D Inclusive spin-dependent asymmetry A1(x,Q2).
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 ρ0 production from COMPASS at CERN
Gautheron F The COMPASS polarized target.
Koivuniemi J Polarization build up in the large COMPASS 6LiD target
CSN1 21/9/2004 F. Bradamante
COMPASSPUBBLICAZIONI
CSN1 21/9/2004 F. Bradamante
COMPASSPRESENTAZIONI A CONFERENZE (INFN)
- F. Bradamante, 2004 Int'l conference on Quarks and Nuclear Physics(QNP2004), Bloomington, USA, May 23-28 2004, 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 CourseErice, 16-24 September 2004"Highlights from the COMPASS experiment at CERN"
- M. Colantoni: COMPASS Workshop on "Hadron Structure and Spectroscopy",Paris, March 1-5 2004:”Pion polarizabilities and diffractive scattering @ 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 withPrimakoff reaction @ COMPASS spectrometer”
- A. Ferrero: BORMIO 2004, XLII International Winter Meeting onNuclear Physics, Bormio, January 25 - February 1 2004:^ÓLambda polarization @ 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”
CSN1 21/9/2004 F. Bradamante
COMPASSPRESENTAZIONI A CONFERENZE (INFN)
(cont.)- A. Martin: COMPASS Workshop on "Hadron Structure and Spectroscopy",
Paris, March 1-5 2004:"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 polarization @ 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: RICH2004- ....
CSN1 21/9/2004 F. Bradamante
COMPASS
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