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    Bianchin panic2011 2 Bianchin panic2011 2 Presentation Transcript

    • Search for Non-Standard Model PhysicsUsing the Transverse Muon Polarization in Stopped K+ Decay The E06 TREK Experiment Sébastien Bianchin TRIUMF / University of British Columbia on behalf of the TREK-E06 Collaboration PANIC 2011 (July 24th – 29th, 2001) Massachusetts Institute of Technology, MA, USA Thursday, July 28th 2011 S. Bianchin PANIC 2011 (July 24th – 29th 2011) 1
    • The TREK Program at J-PARCOutline Hadron Facility at J-PARC TREK Program TREK = Time Reversal Experiment with Kaons  Search for Time Reversal Symmetry Violation  Test of Lepton Universality  Search for Heavy Neutrinos Lower intensity TREK Apparatus -- R & D Status & Schedule S. Bianchin PANIC 2011 (July 24th – 29th 2011) 2
    • Stopped K+ Experiments @ K1.1BR E06 (TREK)“Measurement of T-violating transverse muon polarization (PT) in K+→ 0   decay” Stage-1, 270 kW P36 (LFU) “Measurement of RK = Γ(K+ →e+ν ) / Γ(K+ → + ν ) and search for heavy sterile neutrinos” Stage-1 (PAC11-Jan’11); 30 kW S. Bianchin PANIC 2011 (July 24th – 29th 2011) 3
    • Transverse  + Polarization in the K 3 Decay http://trek.kek.jpK →  decay + 0 + PT is T-odd, and spurious effects from final state interaction are small: PT (FSI) < 10-5 Non-zero PT is a signature of T violation. Standard Model (SM) contribution to P : P (SM) < 10-7- T T Hence PT in the range 10-3 – 10-5 is a sensitive probe of CP violation beyond the SM. There are theoretical models of new physics which allow a sizable PT value without conflicting with other experimental constraints. The TREK experiment aims for a sensitivity of 10-4 S. Bianchin PANIC 2011 (July 24th – 29th 2011) 4
    • Expected Sensitivity We are aiming for a sensitivity of δPT ~ 10-4 δPTstat ~ 0.05 δPTstat (E246) ~ 10-4 : 1.4 x 107 sec runtime1) Beam intensity x 302) Detector acceptance x 103) Larger analyzing power δPTsyst ~ 0.1 δPTsyst (E246) ~ 10-41) Precise calibration of misalignments2) Correction of systematic effects3) Precise fwd-bwd cancellation S. Bianchin PANIC 2011 (July 24th – 29th 2011) 5
    • New Physics: Model Predictions for PT Model K+ → 0+ K+ → +■ Standard Model < 10-7 < 10-7■ Final State Interactions < 10-5 < 10-3Multi-Higgs ≤ 10-3 ≤ 10-3 PT (K+ → 0+) ≈ + 3 PT (K+ → +)SUSY with squark mixing ≤ 10-3 ≤ 10-3 PT (K+ → 0+) ≈ − 3 PT (K+ → +)SUSY with R-parity breaking ≤ 4 x10-4 ≤ 3 x10-4Leptoquark model ≤ 10-2 ≤ 5 x10-3■ Left-Right symmetric model 0 < 7x10-3 S. Bianchin PANIC 2011 (July 24th – 29th 2011) 6
    • The 3-Higgs Doublet Model γ1 α1 M ED sγ n o b→ B→X τν tr eu• N c.f. dn , b→sγ ∝ Im(α1β1*), (α1β1*) Im(α1β1*) _____ 2/v32 Im(γ1α1*) = -v2 E246 Higgs field v.e.v. B→Xτν and B→τν at Super-Belle TREK goal corresponds to PT < 3 x 10-4 c.f. TREK goal : PT ≤ 1 x 10-4 v2/v3 = mt / mτPT is most stringent constraint for Im(γ 1 α 1 *) !! S. Bianchin PANIC 2011 (July 24th – 29th 2011) 7
    • J-PARC Facility (KEK/JAEA ) NorthS. Bianchin PANIC 2011 (July 24th – 29th 2011)
    • J-PARC Facility Linac (KEK/JAEA ) North 3 GeV SynchrotronCY2007 Beams S. Bianchin PANIC 2011 (July 24th – 29th 2011)
    • J-PARC Facility Linac (KEK/JAEA ) North 3 GeV Synchrotron Materials and Life Experimental 50 G FacilitySyn eV chr otro n CY2007 Beams Hadron Exp. JFY2008 Beams Facility S. Bianchin PANIC 2011 (July 24th – 29th 2011)
    • J-PARC Facility Linac (KEK/JAEA ) North 3 GeV SynchrotronNeutrino Beams  (to Kamioka) Materials and Life Experimental 50 G Facility Syn eV chr otro n CY2007 Beams Hadron Exp. JFY2008 Beams Facility JFY2009 Beams S. Bianchin PANIC 2011 (July 24th – 29th 2011)
    • J-PARC Hadron Hall Beam Dump K1.8 KL K1.8BR K1.1 S-type 30~50 GeV Productionprimary beam K1.1BR target (T1) C-type S. Bianchin PANIC 2011 (July 24th – 29th 2011) 9
    • K1.1BR = K0.8 Beam Line InstallationProton beam S. Bianchin PANIC 2011 (July 24th – 29th 2011) 10
    • K1.1BR = K0.8 Beam Line Installation Q1, Q2 D2 T1 D1 Q3, Q4 IFX,Proton beam IFY SX1 ESS Q5, Q6 SX2 K1.1-BR SX1 MS D3 HFOC Q7 Q8 • FF S. Bianchin PANIC 2011 (July 24th – 29th 2011) 10
    • K1.1BR = K0.8 Beam Line Installation K1.1BR completed in summer 2010 using the supplementary budget of FY09 Commissioned in Oct. 2010 by the TREK collaboration - ESS Length of 2.0m to be increased to 2.5m - Length Q8-FF of 3.3m to be reduced to 1.5m (remove iron shielding wall) Q1, Q2 D2 T1 D1 Q3, Q4 IFX,Proton beam IFY SX1 ESS Q5, Q6 SX2 K1.1-BR SX1 MS D3 HFOC Q7 Q8 • FF S. Bianchin PANIC 2011 (July 24th – 29th 2011) 10
    • The TREK Experimental Apparatus K+→0+ Use an upgraded E246 detector Active Polarimeter ( Japan ) New Fibre Target ( Canada ) C0,C1 GEM ( USA ) CsI(Tl) readout ( Russia )PT is measured as the azimuthal asymmetry Ae+ of the + decay positrons S. Bianchin PANIC 2011 (July 24th – 29th 2011) 11
    • The Stopped Beam Method K+→ 0  + Double ratio experimentAT = (Afwd - Abwd ) / 2 Ncw - NccwAfwd(bwd) = Ncw + NccwPT = AT / {α <cosθT>} α : analyzing power <cosθT> : attenuation factorImξ = PT / KF : physics parameter KF : kinematic factorCurrent limit from KEK--E246 bwd -  0 (γ ) fwd -  0 (γ )PT = - 0.0017 ± 0.0023(stat) ± 0.0011(syst) |PT | < 0.005 : 90% C.L.Imξ = - 0.0053 ± 0.0071(stat) ± 0.0036(syst) |Imξ | < 0.016 : 90% C.L Statistical error dominates S. Bianchin PANIC 2011 (July 24th – 29th 2011) 12
    • TREK/E06 Tracking Upgrade GEM technology -- In collaboration with Jefferson Lab, Hampton U. and MIT 70 µm holes 140 µm spacing Planar GEMs (C1) between CsI and C2 Cylindrical GEM (C0) as replacement for old C1 S. Bianchin PANIC 2011 (July 24th – 29th 2011) 13
    • The C0 Cylindrical GEM for TREK 300 mm160 mm 140 mm • Vertex tracking near target, δ < 0.1 mm • Very high rate capability > 1 kHz/mm2 • Radiation-hardness >> 107 particles/mm2 S. Bianchin PANIC 2011 (July 24th – 29th 2011) 14
    • R&D(1) – APD Readout for CsI(Tl) • Improve the timing characteristics of CsI(Tl) by replacing PIN diode with APD • Pulse shaping and pile-up analysis One-module energy One-module timing new requirement too slow•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 S. Bianchin PANIC 2011 (July 24th – 29th 2011) 15
    • R&D(2) – Active Muon Polarimeter Top View e+ μ+ μ+ Full angular acceptance for positrons – 10x higher than in E-246 Determination of decay vertex – background-free measurement Measurement of e+ angle and approx. energy – higher analyzing power Improved field alignment – suppressed systematic error Full-size prototype tested at TRIUMF in Nov. 2009 S. Bianchin PANIC 2011 (July 24th – 29th 2011) 16
    • R&D(3) – Active Scintillating Fiber TargetOne element Baseline design c.f. E246 Ring counters PSI FAST targetCross section 3 x 3 mm 492 fibres  Light guide: 75 mm ϕ Kuraray Y11 WLS fibre  Readout: SiPMT (Hamamatsu MPPC)  Beam test using 130 MeV/c π’s at TRIUMF – radiation damage S. Bianchin PANIC 2011 (July 24th – 29th 2011) 17
    • Upgrade Timeline Target:  Finer segmentation of TGT scintillating fibres Readout: MPPC (SiPMT) Hamamatsu Particle ID:  Aerogel Cherenkov surrounding target, TOF LFU Charged particle tracking: 30 kW  Add new element C1 between CsI(Tl) and C2 ~2013  Add cylindrical GEM (C0) (remove aerogel) TREK π 0 (1&2 photon) detection: 270 kW  New, faster readout of CsI(Tl): APD, MAPD  Wave form analysis using FADCs >100 kW ~2014 Muon polarimeter :  Active polarimeter with increased acceptance  New muon holding field magnet with a parallel field S. Bianchin PANIC 2011 (July 24th – 29th 2011) 18
    • Summary TREK at J-PARC is gaining momentum “K1.1BR” secondary beamline has been commissioned Measurement of the T-violating transverse muon polarization in Kμ3 decay (~2014) - Large potential for the discovery of New Physics - Upgrade of existing experimental setup of KEK E-246 Measure Ke2/Kμ2 ratio to test lepton universality (~2013) Search for heavy neutrinos - Use E-246 apparatus with partial upgrades New collaborators are welcome! S. Bianchin PANIC 2011 (July 24th – 29th 2011) 19
    • The TREK CollaborationCANADA RUSSIAUniversity of Saskatchewan Russian Academy of Sciences (RAS)Department of Physics and Engineering Institute for Nuclear Research (INR)University of British ColumbiaDepartment of Physics and AstronomyTRIUMFUniversite de Montreal JAPAN Osaka UniversityLaboratoire de Physique Nucleaire Department of PhysicsUniversity of Manitoba National Defense AcademyDepartment of Physics Department of Applied Physics Tohoku UniversityUSA Research Center for Electron Photon Science High Energy Accel. Research Org. (KEK)Massachusetts Inst. of Technology (MIT) Institute of Particle and Nuclear StudiesUniversity of South Carolina Institute of Material Structure ScienceDepartment of Physics and Astronomy Accelerator LaboratoryIowa State University Kyoto University,College of Liberal Arts & Sciences Department of PhysicsHampton University Tokyo Institute of Technology (TiTech)Department of Physics Department of PhysicsJefferson Laboratory VIETNAM University of Natural Sciences S. Bianchin PANIC 2011 (July 24th – 29th 2011) 20
    • The TREK CollaborationCANADA RUSSIAUniversity of Saskatchewan Russian Academy of Sciences (RAS)Department of Physics and Engineering Institute for Nuclear Research (INR)University of British ColumbiaDepartment of Physics and AstronomyTRIUMFUniversite de Montreal JAPAN Osaka UniversityLaboratoire de Physique Nucleaire Department of PhysicsUniversity of Manitoba National Defense AcademyDepartment of Physics Department of Applied Physics Tohoku UniversityUSA Research Center for Electron Photon Science High Energy Accel. Research Org. (KEK)Massachusetts Inst. of Technology (MIT) Institute of Particle and Nuclear StudiesUniversity of South Carolina Institute of Material Structure ScienceDepartment of Physics and Astronomy Accelerator LaboratoryIowa State University Kyoto University,College of Liberal Arts & Sciences Department of PhysicsHampton University Tokyo Institute of Technology (TiTech)Department of Physics Department of PhysicsJefferson Laboratory VIETNAMNew collaborators are welcome! University of Natural Sciences S. Bianchin PANIC 2011 (July 24th – 29th 2011) 20
    • Thank YouS. Bianchin PANIC 2011 (July 24th – 29th 2011) 21
    • J-PARC March11 Earthquake Damage S. Bianchin PANIC 2011 (July 24th – 29th 2011)
    • S. Bianchin PANIC 2011 (July 24th – 29th 2011)
    • Lepton Universality in Kl2 and  l2 Decays Highly precise SM values RKSM = ( 2.477 ± 0.001) x 10−5 RSM = (12.352 ± 0.004) x 10−5 High sensitivity to LFV beyond SM e.g. MSSM with charged-Higgs SUSY-LFV RKLFV~ RKSM(1 ± 0.013) Current experimental precision ( NA62, KLOE )RK = (2.488 ± 0.012) x 10−5, 1.1σ dev., RK/RK = 0.5% 0.4% Improve precision to ~ 0.2%, presentation to PAC11 S. Bianchin PANIC 2011 (July 24th – 29th 2011)
    • Lepton Flavour Universality MSSM with charged-Higgs SUSY--LFV N2 / Ne2 ~ 40,000 / 1 σp ~ 1 MeV/c σt ~ 100 psecNew Pseudoscalar Interaction -- RK/RK = 0.2% ΛeP ~ 750 TeV S. Bianchin PANIC 2011 (July 24th – 29th 2011)
    • e/ Identification – LFU Momentum measurement of e+, μ+ TOF measurement between TOF1 and TOF2 e+ trigger by aerogel Cherenkov detector. β(e+ from Ke2) ~1 β(µ+ from K2) ~ 0.92 = 1 / 1.087 Estimated efficiency = 99.2 ± 0.2% Fresnel mirror ⊗ beam n=1.05 beam Target PID performance and detector efficiency will be measured & controlled using Ke3 and Kμ3 data. S. Bianchin PANIC 2011 (July 24th – 29th 2011)