Bianchin_PANIC2011

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  • 以上、加速器の現状を述べましたが、それでは,この施設を用いてどんな研究を展開するのかという話題に移りたいと思います。 この写真はさっきの写真とよく似ておりますが、実験室がよく見えるように、逆方向の南から北方向を眺めたものです。 本年度末には、物質生命科学実験施設とハドロン実験施設において実験が始まります。そして、来年度早々には、ニュートリノビームを神岡の方に送ることにしております。 実験室としては3つありますので、それぞれでどんな科学が展開されるのかをザッと眺めたいと思います。
  • Even with shimming it is impossible to have flat field distribution for both 0.8 and 1.1 GeV/c excitations of B1 1.1 has saturation effect, generating positive n (quadrupole component), which is horizontally defocusing, while field is flat for 0.8 Design shims such that n is negative (can be tolerated by TREK/K0.8, in fact is even better because of horizontal focusing?), then compensating positive n for 1.1 to make it flat. Larger aperture corresponds to higher excitation corresponds to more pronounced saturation effect Schedule to finish beamline by summer 2010 requires mounting of old 2m separator from KEK. However, will intend to replace with new 2.5m separator in preparation of TREK, as pi/K separation will be not be optimal otherwise.
  • Large international collaboration of 20 institutions from six countries
  • Stopping plates oriented parallel to incoming muons Decay positron will penetrate several plates Fill space with drift chamber E246: Plates had been perpendicular to incoming muons, formed collimator for positrons with small solid angle Use well aligned and uniform holding fielld
  • Bianchin_PANIC2011

    1. 1. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) Sébastien Bianchin TRIUMF / University of British Columbia on behalf of the TREK-E06 Collaboration PANIC 2011 (July 24 th – 29 th , 2001) Massachusetts Institute of Technology, MA, USA Thursday, July 28 th 2011 Search for Non-Standard Model Physics Using the Transverse Muon Polarization in Stopped K + Decay The E06 TREK Experiment
    2. 2. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) TREK = T ime R eversal E xperiment with K aons Outline <ul><ul><li>Hadron Facility at J-PARC </li></ul></ul><ul><ul><li>TREK Program </li></ul></ul><ul><ul><ul><li>Search for Time Reversal Symmetry Violation </li></ul></ul></ul><ul><ul><ul><li>Test of Lepton Universality </li></ul></ul></ul><ul><ul><ul><li>Search for Heavy Neutrinos </li></ul></ul></ul><ul><ul><li>TREK Apparatus -- R & D </li></ul></ul><ul><ul><li>Status & Schedule </li></ul></ul>Lower intensity The TREK Program at J-PARC
    3. 3. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) J-PARC Facility (KEK/JAEA ) North Neutrino Beams (to Kamioka) JFY2009 Beams 50 GeV Synchrotron Hadron Exp. Facility Materials and Life Experimental Facility JFY2008 Beams 3 GeV Synchrotron CY2007 Beams Linac
    4. 4. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) Beam Dump K1.8 K1.8BR K1.1 S-type KL K1.1BR C-type 30~50 GeV primary beam <ul><ul><li>Production </li></ul></ul><ul><ul><li>target (T1) </li></ul></ul>J-PARC Hadron Hall
    5. 5. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) <ul><ul><li>K1.1BR completed in summer 2010 using the supplementary budget of FY09 </li></ul></ul><ul><ul><li>Commissioned in Oct. 2010 by the TREK collaboration </li></ul></ul><ul><ul><ul><li>ESS Length of 2.0m to be increased to 2.5m </li></ul></ul></ul><ul><ul><ul><li>Length Q8-FF of 3.3m to be reduced to 1.5m (remove iron shielding wall) </li></ul></ul></ul>K1.1BR = K0.8 Beam Line Installation K1.1-BR Proton beam Q1, Q2 D2 Q3, Q4 D1 T1 ESS Q5, Q6 D3 <ul><ul><li>FF </li></ul></ul>Q7 Q8 MS IFX, IFY SX1 SX2 HFOC SX1
    6. 6. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) <ul><ul><li>E06 (TREK) </li></ul></ul><ul><li>“ Measurement of T-violating transverse muon </li></ul><ul><li>polarization ( P T ) in K + ->      decay ” </li></ul><ul><li>Stage-1 , 270 kW </li></ul><ul><ul><li>P36 (LFU) </li></ul></ul><ul><li>“ Measurement of R K = ( K + -> e +  ) / ( K + ->    ) </li></ul><ul><li>and search for heavy sterile neutrinos ” </li></ul><ul><li>Stage-1 (PAC11-Jan’11) ; 30 kW </li></ul>Stopped K + Experiments K1.1BR
    7. 7. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) CANADA University of British Columbia University of Manitoba Universite de Montreal University of Saskatchewan TRIUMF USA Massachusetts Inst. of Technology (MIT) University of South Carolina Iowa State University Hampton University Jefferson Laboratory RUSSIA Russian Academy of Sciences (RAS) Institute for Nuclear Research (INR)--Moscow JAPAN Osaka University National Defense Academy Tohoku University High Energy Accelerator Research Org. (KEK) Kyoto University Tokyo Institute of Technology (TiTech) VIETNAM University of Natural Sciences TREK Collaboration New collaborators are welcome!
    8. 8. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) Transverse  + polarization in K 3 Decay K + ->      decay <ul><ul><li>P T is T-odd, and spurious effects from final state interaction </li></ul></ul><ul><li>are small: P T (FSI) < 10 -5 </li></ul><ul><li>Non-zero P T is a signature of T violation . </li></ul><ul><ul><li>Standard Model (SM) contribution to P T : P T (SM) < 10 -7 </li></ul></ul><ul><li>- </li></ul><ul><li>Hence P T in the range 10 -3 – 10 -5 is a sensitive probe of </li></ul><ul><li>CP violation beyond the SM. </li></ul><ul><ul><li>There are theoretical models of new physics which allow </li></ul></ul><ul><li>a sizable P T value without conflicting with other </li></ul><ul><li>experimental constraints. </li></ul>The TREK experiment aims for a sensitivity of 10 -4 http://trek.kek.jp
    9. 9. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) TREK Experimental Apparatus Use an upgraded E246 detector P T is measured as the azimuthal asymmetry A e + of the  + decay positrons Active Polarimeter ( Japan ) New Fibre Target ( Canada ) C0,C1 GEM ( USA ) CsI(Tl) readout ( Russia ) K + ->     
    10. 10. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) Stopped beam method K + ->       P T = - 0.0017 ± 0.0023( stat ) ± 0.0011( syst ) | P T | < 0.005 : 90% C.L. Im  = - 0.0053 ± 0.0071( stat ) ± 0.0036( syst ) |Im  | < 0.016 : 90% C.L . Statistical error dominates Double ratio experiment A T = ( A fwd - A bwd ) / 2 N cw - N ccw A fwd ( bwd ) = N cw + N ccw P T = A T / {<cos  T >}  : analyzing power <cos  T > : attenuation factor Im  = P T / KF : physics parameter KF : kinematic factor bwd -    fwd -    Current limit from KEK--E246
    11. 11. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) Expected sensitivity -- TREK <ul><ul><li> P T stat ~ 0.05  P T stat (E246) ~ 10 -4 : 1.4 x 10 7 sec runtime </li></ul></ul><ul><ul><li>Precise calibration of misalignments </li></ul></ul><ul><ul><li>Correction of systematic effects </li></ul></ul><ul><ul><li>Precise fwd-bwd cancellation </li></ul></ul><ul><ul><li>Beam intensity x 30 </li></ul></ul><ul><ul><li>Detector acceptance x 10 </li></ul></ul><ul><ul><li>Larger analyzing power </li></ul></ul><ul><ul><li> P T syst ~ 0.1  P T syst (E246) </li></ul></ul><ul><ul><li>~ 10 -4 </li></ul></ul>We are aiming for a sensitivity of P T ~ 10 -4
    12. 12. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) <ul><ul><li>Model K +   0  +  K +   +  </li></ul></ul><ul><ul><li>Standard Model < 10 -7 < 10 -7 </li></ul></ul><ul><ul><li>Final State Interactions < 10 -5 < 10 -3 </li></ul></ul><ul><ul><li>Multi-Higgs  10 -3  10 -3 </li></ul></ul><ul><li>P T ( K +   0  + )  + 3 P T ( K +   + ) </li></ul><ul><ul><li>SUSY with squark mixing  10 -3  10 -3 </li></ul></ul><ul><li>P T ( K +   0  + )  − 3 P T ( K +   + ) </li></ul><ul><ul><li>SUSY with R -parity breaking  4 x10 -4  3 x10 -4 </li></ul></ul><ul><ul><li>Leptoquark model  10 -2  5 x10 -3 </li></ul></ul><ul><ul><li>Left-Right symmetric model 0 < 7x10 -3 </li></ul></ul>New Physics: Model predictions for P T
    13. 13. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) Three Higgs doublet model <ul><ul><li>c.f. d n , b -> s  ∝ Im(    *), (    *) </li></ul></ul><ul><li>Im(    *) = - v 2 2 / v 3 2 Im(    *) </li></ul> 1   E246 TREK goal B -> X  b -> s  Neutron EDM <ul><ul><li>B -> X and B ->at Super-Belle </li></ul></ul><ul><li>corresponds to P T < 3 x 10 -4 </li></ul><ul><li>c.f. TREK goal : P T ≤ 1 x 10 -4 </li></ul>v 2 / v 3 = m t / m  P T is most stringent constraint for Im(    *) !! _____ Higgs field v.e.v.
    14. 14. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) <ul><ul><li>Highly precise SM values </li></ul></ul><ul><ul><li>High sensitivity to LFV beyond SM </li></ul></ul><ul><ul><li>Current experimental precision ( NA62, KLOE ) </li></ul></ul>Lepton universality in K l 2 and  l 2 decays R K SM = ( 2.477 ± 0.001) x 10 5 R  SM = (12.352 ± 0.004) x 10 5 R K LFV ~ R K SM (1 ± 0.013 ) R K = (2.488 ± 0.012) x 10 5 , 1.1σ dev., R K /R K = 0.5% 0.4% Improve precision to ~ 0.2%, presentation to PAC11 e.g. MSSM with charged-Higgs SUSY-LFV
    15. 15. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) Lepton Flavour Universality N  / N e2 ~ 40,000 / 1 σ p ~ 1 MeV/c  R K /R K = 0.2% Λ eP ~ 750 TeV New Pseudoscalar Interaction -- σ t ~ 100 psec MSSM with charged-Higgs SUSY--LFV
    16. 16. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) beam Target n=1.05 Fresnel mirror PID performance and detector efficiency will be measured & controlled using K e3 and K μ3 data.  beam e/ Identification -- LFU <ul><ul><li>Momentum measurement of e + , μ + </li></ul></ul><ul><ul><li>TOF measurement between TOF1 and TOF2 </li></ul></ul><ul><ul><li>e + trigger by aerogel Cherenkov detector . </li></ul></ul> (e + from K e2 ) ~1 ( + from K  ) ~ 0.92 = 1 / 1.087 Estimated efficiency = 99.2 ± 0.2%
    17. 17. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) <ul><ul><li>Planar GEMs (C1) between CsI and C2 </li></ul></ul><ul><ul><li>Cylindrical GEM (C0) </li></ul></ul><ul><li>as replacement for old C1 </li></ul>70 µm holes 140 µm spacing GEM technology -- In collaboration with Jefferson Lab, Hampton U. and MIT TREK/E06 Tracking Upgrade
    18. 18. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) C0 Cylindrical GEM for TREK 300 mm 140 mm 160 mm <ul><ul><li>Vertex tracking near target,  < 0.1 mm </li></ul></ul><ul><ul><li>Very high rate capability > 1 kHz/mm 2 </li></ul></ul><ul><ul><li>Radiation-hardness >> 10 7 particles/mm 2 </li></ul></ul>
    19. 19. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) <ul><ul><li>Improve the timing characteristics of CsI(Tl) by replacing PIN diode with APD </li></ul></ul><ul><ul><li>Pulse shaping and pile-up analysis </li></ul></ul>One-module energy One-module timing too slow new requirement <ul><ul><li>Both 1 and 9 module tests have been performed using an e+ beam at Tohoku Univ. to check the energy resolution and high-rate performance of APD readout </li></ul></ul>R&D(1) APD Readout for CsI(Tl)
    20. 20. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) R&D(2) Active Muon Polarimeter <ul><ul><li>Full angular acceptance for positrons – 10x higher than in E-246 </li></ul></ul><ul><ul><li>Determination of decay vertex – background-free measurement </li></ul></ul><ul><ul><li>Measurement of e + angle and approx. energy – higher analyzing power </li></ul></ul><ul><ul><li>Improved field alignment – suppressed systematic error </li></ul></ul><ul><ul><li>Full-size prototype tested at TRIUMF in Nov. 2009 </li></ul></ul>μ + e + Top View μ +
    21. 21. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) R&D(3) Active scintillating fibre target 3 x 3 mm 492 fibres 75 mm ϕ Baseline design c.f. E246 Ring counters PSI FAST target Cross section One element <ul><ul><li>Light guide: </li></ul></ul><ul><ul><ul><li>Kuraray Y11 WLS fibre </li></ul></ul></ul><ul><ul><li>Readout: </li></ul></ul><ul><ul><ul><li>SiPMT (Hamamatsu MPPC) </li></ul></ul></ul><ul><ul><li>Beam test using 130 MeV/ c π’s </li></ul></ul><ul><li>at TRIUMF – radiation damage </li></ul>
    22. 22. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) <ul><ul><li>Target: </li></ul></ul><ul><ul><ul><li>Finer segmentation of TGT scintillating fibres Readout: MPPC (SiPMT) Hamamatsu </li></ul></ul></ul><ul><ul><li>Particle ID: </li></ul></ul><ul><ul><ul><li>Aerogel Cherenkov surrounding target, TOF </li></ul></ul></ul><ul><ul><li>Charged particle tracking: </li></ul></ul><ul><ul><ul><li>Add new element C1 between CsI(Tl) and C2 </li></ul></ul></ul><ul><ul><ul><li>Add cylindrical GEM (C0) (remove aerogel) </li></ul></ul></ul><ul><ul><li> 0 (1&2 photon) detection: </li></ul></ul><ul><ul><ul><li>New, faster readout of CsI(Tl): APD, MAPD </li></ul></ul></ul><ul><ul><ul><li>Wave form analysis using FADCs </li></ul></ul></ul><ul><ul><li>Muon polarimeter : </li></ul></ul><ul><ul><ul><li>Active polarimeter with increased acceptance </li></ul></ul></ul><ul><ul><ul><li>New muon holding field magnet with a parallel field </li></ul></ul></ul>UpgradeTimeline LFU 30 kW ~2013 TREK 270 kW >100 kW ~2014
    23. 23. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) <ul><ul><li>TREK at J-PARC is gaining momentum </li></ul></ul><ul><ul><li>“ K1.1BR” secondary beamline has been commissioned </li></ul></ul><ul><ul><li>Measurement of the T-violating transverse muon polarization in K μ3 decay (~2014) - Large potential for the discovery of New Physics - Upgrade of existing experimental setup of KEK E-246 </li></ul></ul><ul><ul><li>Measure K e2 /K μ2 ratio to test lepton universality (~2013) </li></ul></ul><ul><ul><li>Search for heavy neutrinos - Use E-246 apparatus with partial upgrades </li></ul></ul>Summary New collaborators are welcome!
    24. 24. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) J-PARC Mar 11 Earthquake Damage
    25. 25. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011) Thank You
    26. 26. 7/8/2011 S. Bianchin PANIC 2011 (July 24 th – 29 th 2011)

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