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

  2. Porto Two Centres Coimbra (14 PhD + 20 students) : - detectors, analysis, databases Lisbon (20 PhD + 22 students) : - acquisition, trigger, analysis, - medical physics and simulations - astroparticles Coimbra Covilhã Figueira da Foz Lisbon Faro The Laboratory LIP • LIP – Instrumentation and Experimental • Particle Physics Laboratory 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 Paula Bordalo,NUPECC-Lisbon meting

  3. LIP Experiments @ CERN 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 SPS NA51 COMPASS Study of hadron structure and hadron spectroscopy with high intensity muon and hadron beams. LEP Study of electron-positron interactions at Large Electron Positron Collider DELPHI Study of proton-proton interactions at the Large Hadron Collider ATLAS LHC Study of proton-proton interactions at the Large Hadron Collider CMS Paula Bordalo,NUPECC-Lisbon meting

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

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

  6. NA38 & NA50 Goals 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 deconfinedquarks 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 NA50study mmpairsproduction, namely the J/y and y’ resonances Paula Bordalo,NUPECC-Lisbon meting

  7. Strasbourg CERN Orsay Palaiseau Clermont Lisbon Lyon Annecy ~ 100 collaborators in NA50 --- LIP ~ 10% ~ 40 collaborators in NA38 --- LIP ~ 20% NA38 & NA50 Collaborations • NA38is a collaboration of 3 countries and 8 laboratories NA50is a collaboration of 7 countries and 13 laboratories Moscow Yerevan Bucarest Torino Cagliari • LIP responsibilities: - Data acquisition (full resp) • Trigger (shared with LLR) Paula Bordalo,NUPECC-Lisbon meting

  8. 4 Master Theses: João Cruz Catarina Quintans Carla Vale Pedro Rato Mendes João Guimarães LIP Group 4 PhD Theses in NA50 : 4 Seniors in NA50: Gonçalo Borges (05) Helena Santos Catarina Quintans Ruben Shahoian Luca Casagrande Sérgio Silva Conceição Abreu Paula Bordalo Sérgio Ramos 4 Engineers: Jorge Gomes António Almeida Paulo Gomes 4 PhD Theses in NA38: Carlos Lourenço Rui Ferreira Luís Peralta 4 8 Diploma Theses 4 6 Technical Students Paula Bordalo,NUPECC-Lisbon meting

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

  10. Muon pair mass spectrum J/y , y’,DYandDDshapes, generated by Monte Carlo and reconstructed as real data Combinatorial background, mostly coming fromp and k decays, is extracted from measured like-sign pairs Paula Bordalo,NUPECC-Lisbon meting

  11. J/y production results from p-p to Pb-Pb 4Glauber fit performed for the 450/400/200 GeV p-A data givessabs = 4.1±0.4 mb and experimental rescaling factor from 450/400 to 200 GeV 4Results from O, S light ions induced collisions lie on the extrapolated absorption curve ThePb-Pb J/yproduction result is significantlybelow the curve Paula Bordalo,NUPECC-Lisbon meting

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

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

  14. y’ suppression • Hugey’suppression which increases with centrality y’ is more suppressed thanJ/yby a factor of2.5 comparingcentral to peripheral collisions y’/DY y’/J/y y’/DY y’/J/y Paula Bordalo,NUPECC-Lisbon meting

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

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

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

  18. - Z0qq Collaboration in DELPHI experiment The QCD subgroup (3p./12) RUN 117588, EVT 1128 (...but not the last!) RUN 323, EVT 517 (the first Z0...) 14 Aug 1989 Oct 2000 ... - Z0bb+ - Pedro Abreu …on behalf of theLIP DELPHI/QCDgroup July 2004 Paula Bordalo,NUPECC-Lisbon meting

  19. QCD activities in DELPHI (1996-) 6 articles published in journals, of LIP responsability 16 Communications to International Conferences 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 • Differencesin multiplicities in b and light quark events • Colour Reconnection in WW Decays • Search for Pentaquarks in Z hadronic decays Paula Bordalo,NUPECC-Lisbon meting

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

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

  22. Physics COMPASS goals • nucleon spin structure • Gluon Polarization G/G • transverse spin structure function DqT(x) • Flavour dependent polarized quark helicity densities q(x) • spin dependent fragmentation functions D • Diffractive VM production • 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 Paula Bordalo,NUPECC-Lisbon meting

  23. COMPASS spectrometer Beam:160 GeV µ+ 2 . 108 µ/spill (4.8s/16.2s) Pm ~ 80% trigger-hodoscopes DW45 straws SM2 dipole Muon-filter2,MW2 HCAL1 RICH_1 Gem_11 ECAL2,HCAL2 SM1 dipole MWPC Gems Scifi Polarised Target SPS 160 GeV 2.108m/spill Muon-filter1,MW1 Veto straws,MWPC,Gems,SciFi Gems,SciFi,DCs,straws Silicon SciFi Micromegas,DC,SciFi BMS Paula Bordalo,NUPECC-Lisbon meting

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

  25. COMPASS detector performances MicroMegas GEMs DriftChambers Straws Detector CoordEfficiencyResolution 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 overall tracking effiency : 80 to 95 % Paula Bordalo,NUPECC-Lisbon meting

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

  27. Q2 >1(GeVc)2 COMPASS acceptance Excellent for non-perturbative & perturbative physics - small xBj & very small Q2  Q2 > 100 (GeV/c)2 Paula Bordalo,NUPECC-Lisbon meting

  28. Data taking 2002 - 2004 Muon beam Hadron beam 2002 2003 2004 Beam (1) (days) 70 83 106 Luminosity (cm-2) 1039 1.2x1039 ~2.4x1039 Events (x109) 5.8 8.6 ~14 TeraBytes 200 300 >450 2004 19 • DATA ANALYSIS • 2002: full data set analyzed • 2003: data produced (1st phase), preliminary analysis • 2004: a small sample … (1) Scheduled beam excluding MDs and Experiment Setting up Paula Bordalo,NUPECC-Lisbon meting

  29. COMPASS physics results • Longitudinal spin : • DG/G – from open charm • DG/G - Spin asymmetry from high pT hadrons pairs • inclusive A1d • (Flavour decomposition of polarized PDF) • Transverse spin :Collins/Sivers asymmetry • Λ & Λ hyperons, production and polarization • (Vector meson production ρ, f and J/ψ). • Exclusive r production 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 Paula Bordalo,NUPECC-Lisbon meting