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Δραστηριότητες στο πείραμα ALICE στον επιταχυντή LHC του CERN. Α) Συμμετοχή στην A νάπτυξη Y ποδομών ( DAQ ) και Φυσικής ( PID, Συντονισμοί ) . Β) Ανάπτυξη Ηλεκτρονικών Διατάξεων και Μεθόδων Ανάλυσης Δεδομένων από Αλληλεπιδράσεις pp και PbPb. Τμήμα Φυσικής Ε.Κ.Π.Α. - PowerPoint PPT Presentation

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  • ) A Y (DAQ) (PID, ).

    ) pp PbPb. .... ALICE LHC CERN

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  • ALICE() :. -, . . , . . , . :. . . .. :. (. .), . ( ), . (), :. , . , . , . , .

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  • ALICE: An LHC Ion Collider Experiment at CERN-LHCSize 16x26 m. , weight 10.000 tones>1000 30 100

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  • State of Matter under high temperature and pressure Quark-Gluon Plasma (QGP)

    QGP is ground state of QCD and considered to be the primordial matter of the Universe Quarks and gluons are deconfinedChiral symmetry is restored (quarks are massless)

    Mission of Ultrarelativistic Heavy Ion Physics studiesSearch, discover the QGPMeasure the properties of the QGP (HI) -- (QGP)

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  • ALICE: dedicated, general purpose HI experiment (Signatures) :

    [d/d ~6000].

    (PID) (, , , , ).

    GeV >100 GeV.

    (Jets) .

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  • ALICE PPR CERN/LHCC 2003-049PID in ALICEfull bars:3 separation, dashed bars:2 separation

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  • 1) on-line (DAQ,DATE,MOOD,AMORE).. -, . ,. , .

    2) - / Pb-Pb p-p. -, . , . , . , . , . , K.

    3) (1520)-> p (1020)-> (PbPb) pp. . -, . , . ,

    4) ALICE hellasgrid. . -, . OMEGA ALICE,2002-

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  • ( Data Acquisition System ) ALICE o on-line DAQ-ALICE. (Forward detectors) 0, V0, FMD ALICE.

    ( 2004-2006) . (. ) Early StageMarie Curie Fellow DAQ-ALICE, .

    E D on-line . , AMORE . ALICE. . ALICE ( week-DAQ-meetings)1) DAQ-ALICE, MOOD, AMORE

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  • (on-line) (DAQ,DATE,MOOD,AMORE) . (2004-)

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  • . -, . , . , . , . , . , K.

    kink , ( 10% 80% ) . TPC. 2) ( Particle IDentification) -/ Pb-Pb p-p . kink topology , .. K/ -> /

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  • Calculations.Branching ratios taken into accountMC: - kinksQt (GeV/c)K -> + K -> +..K-decay to: Qt: () ( )

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  • . -, . , . , . , . , . , K. (PID ) / Pb-Pb p-p ( . )K PID, pp at 14TeVALICE-INT-2006-012PbPb K 4378 1440e 149

    171 15 5pp 26p 81contam 4,8%

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  • Pb-Pb, kink ALICE-INT-2006-012

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  • Red line:kaons from Det. PID Blue line: K-> + K->2.1 *10 ^6 pp interactions at 14 TeVPt, GeV/cNumberof tracks

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  • Resonance Life-time [fm/c] r 1.3++ 1.7 f0(980) 2.6 K*(892) 4.0 S(1385) 5.7L(1520) 13 (783) 23(1020) 45 3) chemical thermal freeze-out

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  • (1520) pp 14TeV . -, . , . (1520) -> Kp

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  • (1020)-> +- .-, . m(K+K-), GeVentries/20 KeVm(K+K-), GeV

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  • , (5) ALICE (~12 ), .

    .

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  • BACKUP

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  • Estimation of Kaon and Pion Yields from the decay K/ + , kink topology, in one year of Pb-Pb running of the ALICE experiment By: A.Belogianni, P.Ganoti, F.Roukoutakis, M.Spyropoulou-Stassinaki Internal Note/physics , ALICE-INT-2006-012Study of (1520) resonance in pp interactions at ALICE and Kaon identification from its decay + By M.Spyropoulou-StassinakiProceedings of the 1st International Workshop on Soft Physics in ultrarelativistic Heavy Ion Collisions http://www.ct.infn.it/SPHIC06/Study of (1520) production in pp interactions at 14 TeV with the ALICE detectorBy P.GanotiProceedings of the International Conference on Strangeness in Quark Matter, Levoca-Slovakia, 24-29/6/2007J. Phys. G: Nucl. Part. Phys. 35 (2008) 401 407Physics Performance Report, Vol I ALICE Collaboration et al 2004 J. Phys. G: Nucl. Part. Phys. 30 1517- 13 Physics Performance Report, Vol II ALICE Collaboration et al 2006 J. Phys. G: Nucl. Part. Phys. 32 1295-2040 2004-2008

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  • 16/3/2005 Soft Physics Working Group meeting, CERN. Talk Title: A study of K/ kinks generation http://indico.cern.ch/conferenceDisplay.py?confId=a05133321/4 24/4/2005:Workshop on Recent Developments in High Energy Physics and Cosmology (HEP 2005), EESFYE, Aristotle University of Thessaloniki Talk Title: A method for K/p identification in ALICE experiment based on the kinematics of their decay to muons21/2/2006: Soft Physics Working Group meeting, CERN. Talk Title: Searching for Lambda (1520) in Pb-Pb and pp http://indico.cern.ch/conferenceDisplay.py?confId=a06809 14/3/2006:ALICE week, Soft Physics Working Group, CERN. Talk Title: Lambda (1520) measurement in Pb-Pb and pp collisionshttp://indico.cern.ch/conferenceDisplay.py?confId=a06810 15/3/2006: ALICE week, Physics Forum, CERN. Talk Title: Lambda (1520) production http://indico.cern.ch/conferenceDisplay.py?confId=a061699 13/4 16/4/2006:Workshop on Recent Developments in High Energy Physics and Cosmology (HEP 2006), EESFYE, University of Ioannina. Talk Title: 1). The role of resonances production in heavy ion collisions and search for Lambda(1520) in ALICE, http://hep2006.physics.uoi.gr/presentation/day2/4/ganoti.ppt 2). Kink decays (e.g. K/pi to muon+ neutrino) and PID in ALICE http://hep2006.physics.uoi.gr/presentation/day2/3/Stasinaki.ppt

    18/7/2006 Soft Physics Working Group meeting, CERN. Talk Title: Preliminary study of Lambda(1520) in pp collisions http://indico.cern.ch/conferenceDisplay.py?confId=a06816

    List of talks 2005-2008At International Workshops and in ALICE meetings

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  • 29/9/20061st International Workshop on Soft Physics in ultrarelativistic Heavy Ion Collisions, Catania (Italy), 27-29 September 2006Talk Title: Study of (1520) resonance in pp interactions at ALICE and K identification from its decay in muon+neutrino http://www.ct.infn.it/SPHIC06/11/10/2006ALICE week, Physics Forum, CERN. Talk Title:1). Study of (1520) in pp interactions in ALICE 2). K identification from its decay to + http://indico.cern.ch/conferenceDisplay.py?confId=5251

    12/12/2006Soft Physics Working Group meeting, CERN. Talk Title: (1520): Status Report http://indico.cern.ch/conferenceDisplay.py?confId=a0682014/2/2007ALICE Physics week in Munster.Talk Title: A study of (1520) in pp interactions at ALICEhttp://indico.cern.ch/conferenceDisplay.py?confId=109889/5/2007Soft Physics Working Group meeting, CERN. Talk Title: Status reporta)Yields of kaons from their kink decay in pp interactions at ALICE b) (1520) signal with combined PID from TPC and TOFhttp://indico.cern.ch/conferenceDisplay.py?confId=843324/6/2007 International Conference on Strangeness in Quark Matter Levoca, SlovakiaTalk Title: Study of (1520) production in pp interactions @14 TeV with the ALICE detector http://www.saske.sk/SQM2007/sciprog.php.html2/10/2008Soft Physics Working Group meeting, CERN.Talk Title : Kaon identification from kink topology in pp interactionshttp://indico.cern.ch/conferenceDisplay.py?confId=9953

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  • 12/12/2007Soft Physics Working Group meeting, CERN. Talk Title: Kaon identification by kink topology http://indico.cern.ch/conferenceDisplay.py?confId=8438 19/2/2008Soft Physics Working Group meeting, CERN. Talk Title : Kaons from kink topology http://indico.cern.ch/conferenceDisplay.py?confId=2490417/4/2008XXVI Workshop on Recent Developments and Cosmology, HEP2008, Ancient Olympia 16-19/4/2008 , Talk Title : Comparison of Kaon identification through central barrel detectors signals, with the kink topology in ALICE experiment at CERNhttp://hep10.physics.uoc.gr/HEP2008/program/

    http://users.uoa.gr/~mspyrop/, ALICE CERN, (SPIRES, google) : M. (Spyropoulou-)Stassinaki, A. Belogianni , P. Ganoti,, F. Roukoutakis

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  • . , . () , . , . (),. . . ( .) (2004-)

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  • MachineEnergyE(beam)=7* Z/As = 5.5.TeV/A or 1.14 PeV for Pb-PbBeamsPossible combinations: pp, pA, AAHeavy Ion RunningTypically 4 weeks/ year ; typically after pp runningLuminosity10-27 cm-2 s-1 (Pb) to > 10-30 (light ions) 10 to > 100kHz ratesExperimentsALICE: An Lhc Ion Collider Experiment: dedicated, general purpose HI experimentATLAS and CMS have a significant HI programme, but pp is priority

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  • T0 arrays in ALICE

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  • Kaon and Pion decayskinks

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  • The red and blue curves in the next slide correspond to the maximum decay angle of the daughter at a given momentumof the mother particles, kaons and pions respectivelyDecay angle and maximum decay angle of charged daughter in the Lab systemKink topology, :

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  • Mother mom. Vrs decay angle, Kink topology, pp int., 60k events -> +.. -> +-> + -> +..

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  • Hadron Resonances e.g. K(892), (1232), (1385), (1020), (1520) can be used as a method to study the dynamics of QGP hadronization in Heavy Ion Collisions

    Due to short lifetime they can only be measured by reconstruction of their decay products.

    The measurement of (1520), together with other resonances, may provide information about the early state of the expanding source in terms of the influence of the medium on the resonance. Comparison of H.I data withpp collisions will show effects of possible interactions

    Particle Iden