1 / 27

Neutrino experiments

Neutrino experiments. Danuta Kiełczewska Warsaw University & A.Sołtan Institute of Nuclear Studies. Experiments with involvement of PL groups:. No of PL participants Gallex/GNO 1997 - 2001 1

vui
Download Presentation

Neutrino experiments

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Neutrino experiments Danuta Kiełczewska Warsaw University & A.Sołtan Institute of Nuclear Studies Experiments with involvement of PL groups: No of PL participants • Gallex/GNO 1997 - 2001 1 • Super- Kamiokande 1996 - 1-2 • K2K (KEK to Kamioka) 1998 – 2005 2 • Borexino 1994 - 2 • Icarus 2000 - 36* • Gerda 2004 - 1 Also considered: • T2K (T2k-LAr) LOI • GLACIER R&D (some part-time) finally a significant PL contribution Also individual participation in Minos

  2. Polish neutrino groups Senior (18) Junior(21) (incl PhD,MSc) Katowice University of Silesia US J. Kisiel, W. Zipper2 Kraków: Cracow University of Technology H. Kuna-Ciskal, M. Maślak Institute of Nuclear Physics IFJ A. Dąbrowska, J. W. Mietelski, 4 M. Szarska, A. Zalewska Jagellonian University UJ M. Wójcik 2 Univ. of Science and Technology AGH R. Rumian 1 Warszawa Institute for Nuclear Studies IPJT. Kozłowski, E. Rondio, 3 J. Stepaniak, M. Szeptycka Warsaw University WaU W. Dominik, D. Kiełczewska 4 Warsaw University of Technology K. Zaremba 1 Wrocław Wrocław University WrU J. Sobczyk 4 (Neutrino phenomenology)

  3. PhD theses: Completed: 1) G. Żużel, Jagellonian Univ., 2002, „Rn-226 as a background source in Borexino”, 2) B. Beckman, University of Silesia, 2004 „Neutrino properies from supernova explosion” Current (9): A. Ankowski Wrocław University Theory of neutrino interactions K. Graczyk as above as above J. Nowak as above as above J. Łagoda Warsaw University Icarus W. Półchłopek AGH Icarus P. Przewłocki IPJ Icarus, T2K-LAr S. Stach US Icarus A. Szelc IFJ Dark Matter, LAr TPC J. Zalipska IPJ K2K

  4. Master theses (MSc) : 18 Completed: G. Żużel, UJ Borexino 1998 U. Gołębiewska, WaU Super-Kamiokande 1998 M. Misiaszek, UJ Borexino 2000 J. Pasternak, WrU Pion production for a neutrino factory , 2000 J. Nowak WrU CP violation in neutrino interactions, 2001 A. Moryc, WaU/IPJ Super-Kamiokande2001 K. Cieślak, WaU/IPJ Super-Kamiokande 2001 M. Barańska WaU/IPJ Super-Kamiokande 2001 P. Przewłocki, WaU/IPJ Super-Kamiokande2002 D. Rytter WaU/IPJSuper-Kamiokande 2002 A. Maszczyk, UJ Borexino (SNO) 2002 P. Brylski, IFJ Icarus 2003 P. Lipiński, UJ Borexino 2003 M. Kołodziej US Icarus 2004 S. Stach US Icarus 2004 A. Ankowski, WrU „ QE neutrino interactions”, 2004 A. Szelc , IFJ Dark Matter in LAr 2004 D. Stefan, IFJ Icarus 2004

  5. Review of experiments

  6. Super-Kamiokande Institutions JAPAN USA KOREA POLAND 16 14 3 1 ~ 140 authors (Warsaw University) • Discovery of oscillation of atmospheric neutrinos (1998) • (the most often cited high energy experimental paper • in the SLAC HEP database (>2200 citations) • First „neutrino-graphy” of the Sun • Search for proton decays • Search for Dark Matter (via neutralino annihilation)

  7. Oscillation of atmospheric neutrinos in SK Oscillation parameters Evidence for oscillation Oscillation Decay Decoherence

  8. Search for tau appearance in SK Atmospheric: Preliminary NN Result: a = 1.95 ± .63 b = 1.03 ± .06 Expected #: 26.8 fitted #: 52 ± 17 Signal Eff: 34% Total number of tau = 155 (total exp’d=79) A sample enriched in tau. Zenith angle P.P. – MSc thesis 2002

  9. Deficit of solar neutrinos (also with participation of PL groups) Jagellonian University Warsaw University

  10. K2K - KEK to Kamioka 250 km ~ 160 authors 36 institutions (2 from Pl: Wa U, IPJ) A beam of nm of energy around 1 GeV Compared at near detectors and at SK.

  11. Near Detectors at KEK • PL contribution: • Construction of SciFi • Cher. lightcalibration • Particle identification • PhD student on site SciBar

  12. Observation of nm oscillation in K2K Final result: w/o oscill. • A combination of • oberved: • event deficit • spectrum

  13. A summary of the oscillation measurements: Mixing: NOT max max Future measurements: Better precision for: Sign of: t appearance

  14. To study Be solar neutrinos. • in Gran Sasso Lab. • 17 Institutions • incl: Jagellonian University • Selection of low radioactivity • materials. Borexino To be filled with water at the end of 2005, and finally with scintillator in 2006

  15. Supernova neutrinos Solar neutrinos p e++ Long Baselineneutrinos Nucleon stability Icarus LAr TPC detector and physics program A modular approach : T600 + T1200 +T1200 to reach the design mass Atmospheric neutrinos P. Sala

  16. The ICARUS Collaboration 25 institutions, 145 physicists ITALY:L'Aquila, LNF, LNGS, Milano, Napoli, Padova, Pavia, Pisa, CNR Torino, Politec. Milano. SWITZERLAND: ETH/Zürich. CHINA: Academia Sinica Beijing. POLAND: Univ. of Silesia Katowice, Univ. of Mining and Metallurgy Krakow, Inst. of Nucl. Phys. Krakow, Univ. of Technology Krakow, A.Soltan Inst. for Nucl. Studies Warszawa, Warsaw Univ., Wroclaw Univ. USA: UCLA Los Angeles. SPAIN: CIEMAT, Univ. of Granada. RUSSIA:Dubna, INR (Moscow) From PL: 7 institutions, 36 physicists

  17. Icarus milestones (since PL joined the collaboration in 2000) • 2001 - Test in Pavia (with atmospheric muons) 300 tons of LAr (5 papers in 2003-2004) • Dec 2004 - T600 successfully transported to Gran Sasso underground laboratory • Dec 22, 2004 – INFN fully approved main orders for T1200 mechanics and cryogenics • A large cryogenic facility, dimensioned forthe operation of the full liquid Argon mass is now under construction in the Hall B of the LNGS.

  18. T600 analysis: π0 massreconstruction Run 712 Evt 7 (Left Collection View) Main vertex 51 p0 gg candidate events E(g1) = 182.5±22.2 MeV Preliminary q = 40º comb. background in events with > 2 showers E(g2) = 180.8±20.1 MeV t0 = 12.4 ms, te = 1.65 ms Poland+ Pavia analysis Mgg = 150.6±11.8 MeV/c2 in agreement with expected e.m. resolution!

  19. Polish participation in Icarus • Test in Pavia • One of the triggers was prepared by PL groups. • Shifts • Data analysis: • - study of the propagation of scintillation light • - reconstruction of p0 events • - reconstruction of muon energies • - data compression • Icarus in LNGS (examples) • modification of the readout electronics • neutrino interactions (analytical and MC) • procedures for tau event selection • a check of mechanical parameters for cryostats Production of anode wires for next modules

  20. Anode wires for T1200 - production in Poland • Present status: • All the equipment has been constructed, purchased or borrowed from Pavia with many improvements as compared to the original Pavia setup for the wire production of T600. • Common work of the experimental groups from Warsaw, Katowice and Cracow, in close collaboration with the Pavia group. • Laboratory in Cracow (12x5.5 m2) prepared for production. P. Sala

  21. Funding (w/o institutes budgets) PL funding (KBN) (in thousands of PL zl) From foreign sources TARI: Transnational Access to major Research Infrastructure EU PL-I: PL- Italian bilateral agreements • Year SPUB Research • (Icarus) grants • 1996 10 • 1997 10 • 30 • 1999 65 • 2000 55 • 2001 85 • 2002 260 • 2003 181 • 2004 2 134 210 • 127 • -------- • 1033 • Year NATOTARI PL-I • grants exchange • (euros)(man-days in LNGS) • 2001 7000 • 2002 4700 90 80 • 2003 210 80 • 280 40 • 2005 150 40 Participation in SK/K2K has been possible thanks to constant support by University of Calif., Irvine SPUB: special projects and equipment

  22. Plans for future • T2K (T2K-LAr) • GLACIER

  23. T2K (Tokai to Kamioka) nmbeam of <1GeV 0.75 MW 50 (40) GeV PS • nm→ nxdisappearance • nm→ neappearance • NCmeasurement 4MW 50GeV PS Dec.2002 : LOI submitted to J-PARC office signed by 45 physicists from Japan, 110 physicists from: Canada, China, France, Italy, Korea, Poland, Russia, Spain, Switzerland, UK and USA • CPviolation • proton decay K. Nishikawa, Venice 2003

  24. T2K detectors SK 100 ton LAr TPC: (together with other European groups and coordinated by A. Rubbia) LOI is now prepared with PL participation • For precision • measurement of: • cross sections • beam contamination

  25. T2K Schedule 2004 2005 2006 2007 2008 2009 K2K physics run T2K construction Possible future upgrade: • 4MW Super-J-PARC + Hyper-K (1Mt) • CP violation in lepton sector • Proton Decay PS commisionning SK full rebuild Sensitivity to down to 0.006

  26. GLACIER R&D for the future giant LiAr detector for neutrino physics and searches of proton decays (coordinated by A.Rubbia from ETH Zurich). A possible location of an underground laboratory: a salt rock of the Sieroszowice copper mine (details from A. Zalewska). Two-phase (liquid and gas) Ar detector Measurements by J.W.Mietelski, E.Tomankiewicz and S.Grabowska (IFJ)and J.Kisiel, J.Dorda (US): (2.1 0.3) Bq/kg for 40K (0.36  0.06) Bq/kg for nuclides from the U chain (0.11  0.02) Bq/kg for nuclides from the Th chain Very low radioactivity:

  27. Summary • With the discovery of oscillations the interest in neutrino physics has grown considerably: 9 institutions, 39 physicists (18 senior & 21 junior) • We have the expertise from the most successful experiments - now we are mostly involved in the most unique technique for precision measurements (Icarus) • The groups (experimental and theoretical) collaborate very closely - with regular meetings/workshops in Katowice, Kraków, Warszawa or Wrocław.This is very helpful in sharing our expertise in various fields. • We hope to have the resources to participate significantly in the most important neutrino experiments. • We have also dreams for an underground laboratory in PL

More Related