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,

12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 1

Title

Paula BordaloLIP/IST

NUPECC, Lisbon Meeting, 12 November 2004

Hadron Physics at LIP-Lisbon NA38/NA50, Delphi and

COMPASS experiments

Paula BordaloLIP/IST

Laboratory of Instrumentation and

Experimental Particle Physics


The Laboratory LIP

LIP – Instrumentation and Experimental

Particle Physics Laboratory

Lisbon

Coimbra

Faro

CovilhãFigueira 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 portugueseexperimental particle physicists

►► one pole at Faro (2 PhD + 4 students) - silicium detectors and medical - applications

►► Many Collaborators


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 proton-proton interactions at the Large Hadron Collider

Study of electron-positron interactions at Large Electron

Positron Collider

SPS

LHC

LEP


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


NA38/NA50 experimentsMuon pairs and vector-meson production

studies in high energy heavy ion collisions


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


NA38 & NA50 Collaborations

NA38 is a collaboration of 3 countries and 8 laboratories

Lisbon

CERN

AnnecyLyon

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

TorinoBucarest

Yerevan

Moscow


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:


NA38 & NA50 Spectrometer

NA38

Sala de triggerSala de controlo

detector de multiplicidade

Calorímetro a 0º

Hodoscópio P2

NA50


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


J/production results from p-p to Pb-Pb

Glauber fit performed Glauber fit performed for the 450/400/200 for the 450/400/200 GeV p-A data givesGeV p-A data gives abs = 4.1±0.4 mb and and experimental rescaling experimental rescaling factorfactor from 450/400 to from 450/400 to 200 GeV200 GeVResults from Results from O, S O, S light ions light ions induced induced collisions collisions lie onlie on the the extrapolated extrapolated absorption curveabsorption curveTheThe Pb-Pb Pb-Pb

J/J/ production production result is result is significantlysignificantly below the below the curvecurve


J/anomalous suppression

In Pb-Pb collisions, J/DY as a function of ET exhibits a departure from the absorption curve at mid-centrality, followed by a steady decrease


First paper on q & g deconfinement observation


’ 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/


Charmonia Anomalous Suppression

J/is abnormally suppressed in central Pb-Pb collisions

’ is suppressed earlier than J/

Expected by the absorption model (Glauber ) with absabs obtained from p-A data:

absabs = 4.1 = 4.1±0.4 mb±0.4 mb

Charmonia yield measured over expected as a function of centrality

J/DY

’DY


Enhancement

Already in Sulphur induced reactions the is enhanced


DELPHIStudy of electron-positron interaction at

LEP:QCD studies


July 2004…on behalf of the LIP DELPHI/QCD groupPedro Abreu

RUN 323, EVT 517 (the first Z0... )

Z0qq

-

14 Aug 1989

..

.

RUN 117588, EVT 1128 (...but not the last!)

Z0bb+ --

Oct

20

00

(3p. /12)The QCD subgroup

Collaboration in DELPHI experiment


6 articles published in journals, of LIP responsability

11 Oral Presentations in International Conferences, on behalf of the DELPHI Collaboration1 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-)


COMPASSCOMMON MUON and PROTON APPARATUS

for STRUCTURE and SPECTROSCOPY


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


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 qT(x)

Flavour dependent polarized quark helicity densities q(x)

spin dependent fragmentation functions D

Diffractive VM production


SM1 dipoleSM1 dipole

SM2 dipole

Polarised Target

HCAL1

Muon-filter1,MW1SPS 160 GeV 2.108/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 . 108 µ/spill

(4.8s/16.2s)

P ~ 80%

COMPASS spectrometer


Drift

GEM

Straw

SciFi

Inside RICH1Vessel

COMPASS detectors


Detector Coord Efficiency ResolutionScintillating 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 μmStraw tubes 18 > 90% ~ 270 μmMWPC 32 97-99% 2/(12)1/2 mm

MicroMegas GEMs DriftChambers Straws

overall tracking effiency : 80 to 95 %

COMPASS detector performances


Detectors Control System

DCS – full LIP responsibility


Excellent for non-perturbative & perturbative physics

- small xBj & very small Q2 Q2 > 100

(GeV/c)2

COMPASS acceptance

Q2 > 1 (GeVc)2


2004

19

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

(1) Scheduled beam excluding MDs and Experiment Setting up

DATA ANALYSIS2002: full data set analyzed2003: data produced (1st phase), preliminary analysis2004: a small sample …

Muon beam Hadron beam

Data taking 2002 - 2004


• Longitudinal spin :

G/G – from open charm G/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, and J/ψ). Exclusive production

COMPASS physics results


Summary

The envolvement of LIP in Hadronic Physics isrelevant:

Large participation in the Heavy Ion experimentsNA38 / NA50 at CERN/SPS

Participation in the Delphi/LEP experiment

Participation in the COMPASS/SPS experiment

Documents

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,