1. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 1 Title Paula Bordalo LIP/IST NUPECC, Lisbon Meeting, 12 November 2004 Hadron Physics at LIP-Lisbon NA38/NA50, Delphi and COMPASS experiments Paula Bordalo LIP/IST Laboratory of Instrumentation and Experimental Particle Physics

2. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 2 The Laboratory LIP LIP – Instrumentation and Experimental Particle Physics Laboratory Lisbon Coimbra Faro Covilhã Figueira da Foz Porto Two Centres Coimbra (14 PhD + 20 students) : - detectors, analysis, databases Lisbon (20 PhD + 22 students) : - acquisition, trigger, analysis, - medical physics and simulations - astroparticles LIP is a FCT Associate Laboratory which congregates major portuguese experimental particle physicists one pole at Faro (2 PhD + 4 students) - silicium detectors and medical - applications Many Collaborators

3. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 3 LIP Experiments @ CERN CMS ATLAS DELPHI COMPASS NA38 NA50 Muon production from high energy heavy ion collisions at SPS Study of the isospin symmetry breaking in the light quark sea of the nucleon from the Drell-Yan process NA51 Study of hadron structure and hadron spectroscopy with high intensity muon and hadron beams. Study of proton-proton interactions at the Large Hadron Collider Study of electron-positron interactions at Large Electron Positron Collider SPS LHC LEP

4. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 4 Other LIP Experiments This project aims to construct and explore a net of cosmic rays detectors installed in several high schools connect by the Internet Cosmic Rays Telescope PET Development of Positron Emission Mammography ESA Restec Hera-b Medical Physics ESA Geant4 EUSO AMS Monte Carlo Simulation and Detectors for Creation of Clinical Images EUSO - Extreme Universe Space Observatory, aims to detect and analyse extreme energy cosmic rays Development of Geant4 simulations for the EUSO and AMS New simulation tools for environment radiation and for radiation effects Alpha Magnetic Spectrometer for antimatter and darkmatter search and cosmic rays studies Large aperture high-rate spectrometer to measure CP-violation in B-meson decays CPLEAR Precision measurements of C, CP, CPT-violation on the neutral K-system

5. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 5 NA38/NA50 experiments Muon pairs and vector-meson production studies in high energy heavy ion collisions

6. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 6 LIP is involved, since the begining, at the CERN/SPS ultrarelativistic Heavy Ion Program To search Quark Gluon Plasma formation a new state of matter deconfined quarks and gluons 1986-1992 first exploratory progam : NA38 p-U, p-W, O-U and S-U collisions @ 200 GeV/nucleon 1994-2000 second phase progam : NA50 p -A, Pb-Pb interactions @ 450, 158 GeV/nucleon » » NA38 and NA50 study pairs production, namely the J/ and resonances NA38 & NA50 Goals

7. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 7 NA38 & NA50 Collaborations NA38 is a collaboration of 3 countries and 8 laboratories Lisbon CERN Annecy Lyon Clermont Strasbourg Palaiseau Orsay ~ 40 collaborators in NA38 --- LIP ~ 20% LIP responsibilities: - Data acquisition (full resp) - Trigger (shared with LLR) ~ 100 collaborators in NA50 --- LIP ~ 10% NA50 is a collaboration of 7 countries and 13 laboratories Cagliari Torino Bucarest Yerevan Moscow

8. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 8 LIP Group Conceição Abreu Paula Bordalo Sérgio Ramos 8 Diploma Theses Gonçalo Borges (05) Helena Santos Catarina Quintans Ruben Shahoian Luca Casagrande Sérgio Silva PhD Theses in NA50 : Carlos Lourenço Rui Ferreira Luís Peralta PhD Theses in NA38 : João Cruz Catarina Quintans Carla Vale Pedro Rato Mendes João Guimarães Master Theses: Engineers: 6 Technical Students Jorge Gomes António Almeida Paulo Gomes Seniors in NA50:

9. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 9 NA38 & NA50 Spectrometer NA38 Sala de trigger Sala de controlo detector de multiplicidade Calorímetro a 0º Hodoscópio P2 NA50

10. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 10 Muon pair mass spectrum J,, DY and DD shapes, generated by Monte Carlo and reconstructed as real data Combinatorial background, mostly coming from and k decays, is extracted from measured like-sign pairs

11. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 11 J/production results from p-p to Pb-Pb Glauber fit performed for the 450/400/200 GeV p-A data gives and experimental rescaling factor from 450/400 to 200 GeV Glauber fit performed for the 450/400/200 GeV p-A data gives abs = 4.1±0.4 mb and experimental rescaling factor from 450/400 to 200 GeV Results from O, S light ions induced collisions lie on the extrapolated absorption curve Results from O, S light ions induced collisions lie on the extrapolated absorption curve The Pb-Pb J/ production result is significantly below the curve

12. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 12 J/anomalous suppression In Pb-Pb collisions, J/ DY as a function of E T exhibits a departure from the absorption curve at mid-centrality, followed by a steady decrease

13. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 13 First paper on q & g deconfinement observation

14. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 14 suppression Huge suppression which increases with centrality is more suppressed than J/ by a factor of 2.5 comparing central to peripheral collisions DY J/ DY J/

15. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 15 Charmonia Anomalous Suppression J/ is abnormally suppressed in central Pb-Pb collisions is suppressed earlier than J/ abs Expected by the absorption model (Glauber ) with abs obtained from p-A data: abs = 4.1±0.4 mb abs = 4.1±0.4 mb Charmonia yield measured over expected as a function of centrality J/ DY DY

16. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 16 Enhancement Already in Sulphur induced reactions the is enhanced

17. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 17 DELPHI Study of electron-positron interaction at LEP: QCD studies

18. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 18 July 2004 …on behalf of the LIP DELPHI/QCD group Pedro Abreu RUN 323, EVT 517 (the first Z 0... ) Z 0 qq - 14 Aug 1989... RUN 117588, EVT 1128 (...but not the last!) Z 0 bb + - - Oct 2000 (3p. /12) The QCD subgroup Collaboration in DELPHI experiment

19. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 19 6 articles published in journals, of LIP responsability 11 Oral Presentations in International Conferences, on behalf of the DELPHI Collaboration 1 Ph. D. Thesis in Physics concluded, 1 Ph. D. Thesis in progress Co-Coordination of DELPHI - QCD/ Research Line Charged particle multiplicities in Z & WW hadronic Decays Studies in quark and gluon jets, in three jets Z events Differences in multiplicities in b and light quark events Colour Reconnection in WW Decays Search for Pentaquarks in Z hadronic decays 16 Communications to International Conferences QCD activities in DELPHI (1996-)

20. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 20 COMPASS COMMON MUON and PROTON APPARATUS for STRUCTURE and SPECTROSCOPY

21. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 21 COMPASS Collaboration 12 Countries, 23 Labs, 230 Physicists (7 from LIP ) Bielefeld, Bochum, Bonn (ISKP & PI), Erlangen, Freiburg, Heidelberg, Mainz, München (LMU & TU) Helsinki Saclay Tel Aviv Burdwan, Calcutta Torino(University,INFN), Trieste(University,INFN) Warsaw (SINS), Warsaw (TU) CERN Nagoya Prag Dubna (LPP and LNP), Moscow (INR, LPI, State University), Protvino Lisbon LIP 2002

22. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 22 Physics COMPASS goals nucleon spectroscopy Primakoff reactions -polarizability of and K Exotic hadrons: -glueballs (gg) -hybrids (qqg) -pentaquarks (qqqqq) … charmed mesons and baryons -semi-leptonic decays -double-charmed baryons nucleon spin structure Gluon Polarization G/G transverse spin structure function q T (x) Flavour dependent polarized quark helicity densities q(x) spin dependent fragmentation functions D Diffractive VM production

23. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 23 SM1 dipole SM2 dipole Polarised Target HCAL1 Muon-filter1,MW1 SPS 160 GeV 2.10 8 /spill Micromegas,DC,SciFi Gems,SciFi,DCs,straws MWPC Gems Scifi trigger-hodoscopes Silicon RICH_1 BMS Gem_11 ECAL2,HCAL2 straws,MWPC,Gems,SciFi straws Muon-filter2,MW2 DW45 SciFi Veto Beam: 160 GeV µ + 2. 10 8 µ/spill (4.8s/16.2s) P ~ 80% COMPASS spectrometer

24. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 24 Drift GEM Straw SciFi Inside RICH1 Vessel COMPASS detectors

25. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 25 Detector Coord Efficiency Resolution Scintillating fibers 21 94% 130 μm Silicon Detectors 21 98% 9 μm MicroMegas 12 95-98% 70 μm GEM detector 40 95-98% 50 μm Drift Chambers 24 94-97% 170 μm Straw tubes 18 > 90% ~ 270 μm MWPC 32 97-99%2/(12) 1/2 mm MicroMegas GEMs DriftChambers Straws overall tracking effiency : 80 to 95 % COMPASS detector performances

26. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 26 Detectors Control System DCS – full LIP responsibility

27. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 27 Excellent for non-perturbative & perturbative physics - small x Bj & very small Q 2 Q 2 > 100 (GeV/c) 2 COMPASS acceptance Q 2 > 1 (GeVc) 2

28. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 28 2004 19 200220032004 Beam (1) (days)7083106 Luminosity (cm -2 )10 39 1.2x10 39 ~2.4x10 39 Events (x10 9 )5.88.6~14 TeraBytes200300>450 (1) Scheduled beam excluding MDs and Experiment Setting up DATA ANALYSIS 2002: full data set analyzed 2003: data produced (1 st phase), preliminary analysis 2004: a small sample … Muon beam Hadron beam Data taking 2002 - 2004

29. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 29 Longitudinal spin : G/G – from open charm G/G - Spin asymmetry from high p T hadrons pairs inclusive A 1 d (Flavour decomposition of polarized PDF) Transverse spin : Collins/Sivers asymmetry Λ & Λ hyperons, production and polarization (Vector meson production ρ, and J/ψ). Exclusive production COMPASS physics results

30. 12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 30 Summary The envolvement of LIP in Hadronic Physics is relevant: Large participation in the Heavy Ion experiments NA38 / NA50 at CERN/SPS Participation in the Delphi/LEP experiment Participation in the COMPASS/SPS experiment