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Polish participation in fixed target experiments at CERN (1999-2004)

J.P.Nassalski 25.02.2005 RECFA, Warsaw. Polish participation in fixed target experiments at CERN (1999-2004) NA48 & NA48.1 running NA49 NA59 (COMPASS) NA47 (SMC) running WA98 completed. Sources of funds.

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Polish participation in fixed target experiments at CERN (1999-2004)

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  1. J.P.Nassalski 25.02.2005 RECFA, Warsaw • Polish participation • in fixed target experiments • at CERN (1999-2004) • NA48 & NA48.1 running • NA49 • NA59 (COMPASS) • NA47 (SMC) running • WA98 completed RECFA, Warsaw, 25.02.2005

  2. Sources of funds • Budget of Institutes: • - salaries of physicists and PhD students, • - all overheads: electricity, heating, phones, faxes… • (ex.: average for SINS: 42kzł (10.4kЄ) /year / <person>) • It will be not accounted for in experimental budgets. • Funds for „Special Projects and Equipment” (SPUB) • from the fundning agency (KBN): • - building detectors, • - contributions to Common Funds, • - travel, • - local infrastructure (computers, …), • - supplements to salaries. RECFA, Warsaw, 25.02.2005

  3. Grants from KBN (typically 100kzł /year in total): • - can not be used for Common Funds, • - used to supplement SPUB for specific items, • - there are special grants to support PhD students • and young researchers. • Funds from bilateral agreements (PL-D, PL-F, …): • used for the exchange of physicists between collaborating • Institutes. • Funds from EU. RECFA, Warsaw, 25.02.2005

  4. NA48 RECFA, Warsaw, 25.02.2005

  5. Institution • Soltan Institute for Nuclear Studies: • High Energy Physics Department, • Department of Nuclear Detectors and Electronics Participants • 4 physicists • 2 electronics engineers • 1 PhD student • 1 diploma student only 1 physicist continued in NA48.1 RECFA, Warsaw, 25.02.2005

  6. Budget for experiment (does not include personnel costs covered by Institutes) a) Common fund for NA48.1 40% common funds, 24% travel, 17% overheads, 13% salaries, 5% equipment, … In addition: 1 PhD grant of 23kzł. RECFA, Warsaw, 25.02.2005

  7. Hardware responsabilities • Design, making a prototype, testing after production • and maintenance of: • 60 modules of Fastbus Clock Fanout, • 65 modules of Fastbus Optoisolated Cluster Interconnect, • 30 modules of VME FOL-RIO Interface. RECFA, Warsaw, 25.02.2005

  8. Contributions to physics analysis • Parallel analysis for: • search for light gluino, • 1 PhD, • KS lifetime, • Contributions to systematics: • 1 diploma, • η and K0 mass. RECFA, Warsaw, 25.02.2005

  9. World data on Highlights COMBINED RESULT FROM ALL EXPERIMENTS: ε’/ε = (16.6 ± 1.6) · 10-4 RECFA, Warsaw, 25.02.2005

  10. K0, η masses and K0 lifetime • In 2002: • higher precision than that of PDG2000 • and 1.7σ above it, • consistent with PDG2000 and with a similar error, • 2.4 times higher precision than that of PDG2000 and • it differs from it by 4.2σ. RECFA, Warsaw, 25.02.2005

  11. RECFA, Warsaw, 25.02.2005

  12. Event display: ~1200 charged particles NA49 Large Acceptance Hadron Spectrometer for the study of Heavy Ion Collisions RECFA, Warsaw, 25.02.2005

  13. Institutions • Soltan Institute for Nuclear Studies (SINS), • High Energy Physics Department, Warsaw, • Warsaw University (WU), • Institute of Experimental Physics, • Institute of Nuclear Physics, Polish Academy of Science (INP), Kraków, • Świętokrzyska Academy (SA), Kielce (since April 2002). RECFA, Warsaw, 25.02.2005

  14. Participants (2005) 10 students obtained diploma in 1998-2005 RECFA, Warsaw, 25.02.2005

  15. Budget for experiment (does not include personnel costs covered by Institutes) kzł kzł 30% travel, 27% salaries, 16% equipment, 16% overheads, … In addition: a) 3000Є from PL-D b) 75kЄ from Helmholtz Gemeinschaft (2004-2006) RECFA, Warsaw, 25.02.2005

  16. Main results First beam 1996, last 2002, analysis goes on. Main goal: search for QGP in HI collisions Main results (whole collaboration): • Strangeness enhancement in central Pb-Pb collisions, • Collective behaviour (HBT, flow), • Non-monotonic energy dependence of strangeness production. RECFA, Warsaw, 25.02.2005

  17. Main results of Cracow & Warsaw groups: 1) Evolution of baryon stopping from p-p to p-Pb to Pb-Pb, 2) Non-statistical fluctuations in pt, 3) Nuclear modification factor in p-Pb. RECFA, Warsaw, 25.02.2005

  18. Evolution of net baryon number: RECFA, Warsaw, 25.02.2005

  19. Nuclear modification factor in p-Pb RECFA, Warsaw, 25.02.2005

  20. Kielce group in NA49 collaboration • Thegroup was involved in collecting the data at the SPS and now it participates in the data analysis.It is responsible for the magnetic field calibration via K0 mass reconstruction and the recalibration of the Veto calorimeter.The group performs the analysis to determine: • fluctuations of multiplicity & pT; • collective flow of  hyperons; • production of K0*. In October 2004 the group organized the International Workshop on Future of Nuclear Collisions at High Energies. RECFA, Warsaw, 25.02.2005

  21. NA58 COMMON MUON and PROTON APPARATUS for STRUCTURE and SPECTROSCOPY RECFA, Warsaw, 25.02.2005

  22. Institutions • Soltan Institute for Nuclear Studies (SINS), • High Energy Physics Department, • Warsaw University (WU), • Institute of Experimental Physics, • Warsaw University of Technology (WUT), • Institute of Radioelectronics. RECFA, Warsaw, 25.02.2005

  23. Participants (2005) One PhD student from SINS graduated in 2004 and left COMPASS. RECFA, Warsaw, 25.02.2005

  24. Budget for experiment (does not include personnel costs covered by Institutes) kzł kzł 32% travel, 22% common funds, 19% overheads, 16% salaries, 6% equipment, … 180kzł shared between COMPASS and SMC. • In addition: • 2 PhD grants, 50kzł in total, • „Polonium”, Saclay-SINS, 1.7kЄ for travel in 2004. RECFA, Warsaw, 25.02.2005

  25. Contributions to hardware Construction of an additional SciFi detector to be used for tracking in the beam region (from 2006). Contributions to general purpose software • Alternative algorithm of track reconstruction, • Alignment of data taken in 2002 – 2004, • Implementation of additional scintillator hodoscopes • used to determine beam momentum, • Radiative corrections and dilution factor. RECFA, Warsaw, 25.02.2005

  26. Physics program of COMPASS (as in the Proposal) • Nucleon spin structure, using muon beam: • Gluon polarisation ΔG(x)/G(x), • Quark polarisation of different flavours Δq(x), • Transverse spin distribution function ΔTq(x), • Spin-dependent fragmentation function ΔDqΛ.. • Hadron spectroscopy, using hadron beams: • Primakoff reactions, • Polarisability of π and K, • Glueballs and hybrids, • Semileptonic decays of charmed hadrons, • Double-charmed barions. RECFA, Warsaw, 25.02.2005

  27. Contributions to physics analysis Warsaw group has experience from previous CERN muon experiments: EMC  NMC  SMC  COMPASS. • ΔG(x)/G(x) from events with hadron pairs at large pt, • ΔG(x)/G(x) from events with D*, • Search for Φ(1860) pentaquark (parallel analysis), • A1d at small x and Q2 (parallel analysis), • Spin matrix elements for exclusive ρ0 production • (parallel analysis), • A1d for exclusive ρ0 production (parallel analysis), • A1d for identified hadrons. RECFA, Warsaw, 25.02.2005

  28. ΔG/Gfrom large pt ΔG/G = 0.06 ± 0.31stat. ± 0.06syst. 2002/03 data Q2 > 1 GeV2 <xg> = 0.13 ± 0.08 RECFA, Warsaw, 25.02.2005 GSA,B,C: T. Gehrmann and W. Sterling, Z. Phys. C65 (1994) 461.

  29. D0 signal ( ΔG) D* D0πs(Kπ) πs RECFA, Warsaw, 25.02.2005

  30. x·g1d(x) 2002/03 data Q2 > 1 GeV2 RECFA, Warsaw, 25.02.2005

  31. Prospects The only fixed target experiment considered so far for running in mid-term planning (2006-2010) at CERN. Possible new item in the future physics program: measurements of GPD (within the EU „Hadron Physics”): polish group contributes 73kЄ in 2004-2006 to build a prototype of recoil detector as a joint project of Bonn, Mainz, Saclay and Warsaw. RECFA, Warsaw, 25.02.2005

  32. NA47 (SMC) RECFA, Warsaw, 25.02.2005

  33. End of data taking: 1996. • Institutions: SINS (5 physicists + 1PhD), WU (1 + 1PhD), • WUT (2 engineers), • Experimental budget in the reporting period: in 2000-2003, • 180kzł shared between SMC and COMPASS, • 5 publications since 1999: 3 technical + 2 on physics: •  1999: A1p,dat small x and Q2 , •  2004: ΔG/G from events with hadrons at large pt. • In both cases – a major role in the analysis (1 PhD from • each activity). All of physicists are now in COMPASS. RECFA, Warsaw, 25.02.2005

  34. Low x trigger implemented by Warsaw group RECFA, Warsaw, 25.02.2005

  35. WA98 RECFA, Warsaw, 25.02.2005

  36. End of data taking: 1996, • Institutions: SINS (3 physicists +1PhD), SA (1 pysicist), • WUT (1 engineer); • 2 PhDs*) • Experimental budget*): • 200kzł. • ~20 publications*). • -------------------- • *) in 1999-2004 RECFA, Warsaw, 25.02.2005

  37. FIG. 4: Yield of direct photons extracted from the strength of the two-photon correlation (closed circles) and by the statistical subtraction method (open circles, or arrows indicating upper limits) [6]. Total statistical plus systematical errors are shown. Interferometry of Direct Photons in Central 208Pb+208Pb Collisions at 158AGeV, Phys. Rev. Lett. 93(2004)022301 Two-particle correlations of direct photons were measured in central 208 Pb+ 208 Pb collisions at 158 AGeV. The invariant interferometric radii were extracted for 100 < KT < 300 MeV/c and compared to radii extracted from charged pion correlations. The yield of soft direct photons, KT < 300 MeV/c, was extracted from the correlation strength and compared to theoretical calculations. RECFA, Warsaw, 25.02.2005

  38. One-, Two- and Three-Particle Distributions from 158A GeV/c Central Pb+Pb Collisions, Phys. Rev C67(2003)014906 RECFA, Warsaw, 25.02.2005

  39. Thank you RECFA, Warsaw, 25.02.2005

  40. Large CPV effect seen in ... • KL π+π-e+e-, confirming KTeV result: AΦ = (14.2 ± 3.6)% BR = (3.08 ± 0.20) ·10-7 AΦ = (13.6 ± 2.8)% BR = (3.2 ± 0.7 ) ·10-7 in agreement with predictions. • ... butnot in KS π+π-e+e-(only NA48 data): AΦ = (0.5 ± 4.3)% BR = (4.69 ± 0.30) ·10-5 • as expected, • indicating that AΦ≠ 0 in KL is genuine effect. RECFA, Warsaw, 25.02.2005

  41. Evolution of non-statistical pt fluctuations with centrality: RECFA, Warsaw, 25.02.2005

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