Bianchin panic2011 2

S. Bianchin PANIC 2011 (July 24th – 29th 2011)

Sébastien BianchinTRIUMF / University of British Columbiaon behalf of the TREK-E06 Collaboration

PANIC 2011 (July 24th – 29th, 2001) Massachusetts Institute of Technology, MA, USA

Thursday, July 28th 2011

Search for Non-Standard Model Physics Search for Non-Standard Model Physics Using the Transverse Muon Polarization Using the Transverse Muon Polarization

in Stopped Kin Stopped K++ Decay Decay

The E06 TREK Experiment

1


TREK = Time Reversal Experiment with Kaons

OutlineOutline

Hadron Facility at J-PARC

TREK Program

Search for Time Reversal Symmetry Violation Test of Lepton Universality Search for Heavy Neutrinos

TREK Apparatus -- R & D

Status & Schedule

Lower intensity

The TREK Program at J-PARCThe TREK Program at J-PARC

2


E06 (TREK) “Measurement of T-violating transverse muon polarization (PT) in K+→0decay” 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

Stopped KStopped K++ Experiments @ K1.1BR Experiments @ K1.1BR

3


K+→0+decay

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 PT : PT (SM) < 10-7 -

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

http://trek.kek.jp

Transverse Transverse ++ Polarization in the K Polarization in the K33 Decay Decay

4


δPTstat ~ 0.05 δPT

stat (E246) ~ 10-4 : 1.4 x 107 sec runtime

1) Precise calibration of misalignments 2) Correction of systematic effects3) Precise fwd-bwd cancellation

1) Beam intensity x 302) Detector acceptance x 103) Larger analyzing power

δPTsyst ~ 0.1 δPT

syst (E246)

~ 10-4

We are aiming for a sensitivity of δPT ~ 10-4

Expected Sensitivity Expected Sensitivity

5


Model K+ → 0+ K+ → +

■ Standard Model < 10-7 < 10-7

■ Final State Interactions < 10-5 < 10-3

Multi-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 x10-4

Leptoquark model ≤ 10-2 ≤ 5 x10-3

■ Left-Right symmetric model 0 < 7x10-3

New Physics: Model Predictions for New Physics: Model Predictions for PPTT

6


• c.f. dn , b→sγ ∝ Im(α1β1*), (α1β1*)

Im(α1β1*) = -v22/v3

2 Im(γ1α1*)

γ1

α1

E246

TREK goal

B→X τνb→sγNeu

tron E

DM

B→Xτν and B→τν at Super-Belle corresponds to PT < 3 x 10-4

c.f. TREK goal : PT ≤ 1 x 10-4 v2/v3 = mt / mτ

PT is most stringent constraint for Im(γ1α1*) !!

_____Higgs field v.e.v.

The 3-Higgs Doublet ModelThe 3-Higgs Doublet Model

7


J-PARC Facility(KEK/JAEA ）

North



3 GeV Synchrotron

CY2007 Beams

Linac

North



50 GeV Synchrotron

Hadron Exp. Facility

Materials and Life Experimental

Facility

JFY2008 Beams

3 GeV Synchrotron

CY2007 Beams

Linac

North



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


Beam Dump

K1.8

K1.8BR

K1.1S-type

KL

K1.1BRC-type

30~50 GeV primary beam

Productiontarget (T1)

J-PARC Hadron HallJ-PARC Hadron Hall

9


Proton beam

K1.1BR = K0.8 Beam Line InstallationK1.1BR = K0.8 Beam Line Installation

10


K1.1-BR

Proton beam

Q1, Q2

D2

Q3, Q4D1T1

ESS

Q5, Q6

D3

• FF

Q7 Q8

MS

IFX, IFY

SX1

SX2

HFOC

SX1


10


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)

K1.1-BR

Proton beam

Q1, Q2

D2

Q3, Q4D1T1

ESS

Q5, Q6

D3

• FF

Q7 Q8

MS

IFX, IFY

SX1

SX2

HFOC

SX1


10


Use an upgraded E246 detector

PT is measured as the azimuthal asymmetry Ae+ of the + decay positrons

Active Polarimeter ( Japan )

New Fibre Target ( Canada )

C0,C1 GEM ( USA )

CsI(Tl) readout ( Russia )

K+→0+

The TREK Experimental Apparatus The TREK Experimental Apparatus

11


Statistical error dominates

Double ratio experimentAT = (Afwd - Abwd ) / 2

Ncw - NccwAfwd(bwd) = Ncw + Nccw

PT = AT / {α <cosθT>} α : analyzing power <cosθT> : attenuation factor Imξ = PT / KF : physics parameter KF : kinematic factor

bwd - 0 (γ ) fwd - 0 (γ )Current limit from KEK--E246

The Stopped Beam Method The Stopped Beam Method K+→0+

PT = - 0.0017 ± 0.0023(stat) ± 0.0011(syst)

Imξ = - 0.0053 ± 0.0071(stat) ± 0.0036(syst)

|PT | < 0.005 : 90% C.L.

|Imξ | < 0.016 : 90% C.L

12


Planar GEMs (C1) between CsI and C2

Cylindrical GEM (C0) as replacement for old C1

70 µm holes

140 µm spacing

GEM technology --In collaboration with Jefferson Lab, Hampton U. and MIT

TREK/E06 Tracking UpgradeTREK/E06 Tracking Upgrade

13


300 mm

140 mm

160 m

m

• Vertex tracking near target, δ < 0.1 mm• Very high rate capability > 1 kHz/mm2

• Radiation-hardness >> 107

particles/mm2

The C0 Cylindrical GEM for TREKThe C0 Cylindrical GEM for TREK

14


• 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

too slow new requirement•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

R&D(1) – APD Readout for CsI(Tl)R&D(1) – APD Readout for CsI(Tl)

15


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

μ+

e+

Top View

μ+

R&D(2) – Active Muon PolarimeterR&D(2) – Active Muon Polarimeter

16


3 x 3 mm

492 fibres

75 mm ϕ

Baseline design c.f. E246 Ring counters PSI FAST target

Cross section

One element

Light guide:Kuraray Y11 WLS fibre

Readout:SiPMT (Hamamatsu MPPC)

Beam test using 130 MeV/c π’s at TRIUMF – radiation damage

R&D(3) – Active Scintillating Fiber TargetR&D(3) – Active Scintillating Fiber Target

17


Target: Finer segmentation of TGT scintillating fibres

Readout: MPPC (SiPMT) Hamamatsu

Particle ID: Aerogel Cherenkov surrounding target, TOF

Charged particle tracking: Add new element C1 between CsI(Tl) and C2

Add cylindrical GEM (C0) (remove aerogel)

π0 (1&2 photon) detection: New, faster readout of CsI(Tl): APD, MAPD Wave form analysis using FADCs

Muon polarimeter : Active polarimeter with increased acceptance New muon holding field magnet with a parallel field

LFU30 kW~2013

TREK270 kW>100 kW~2014

Upgrade TimelineUpgrade Timeline

18


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!

SummarySummary

19


The TREK CollaborationThe TREK Collaboration

CANADAUniversity of Saskatchewan Department of Physics and EngineeringUniversity of British ColumbiaDepartment of Physics and AstronomyTRIUMFUniversite de MontrealLaboratoire de Physique NucleaireUniversity of ManitobaDepartment of Physics

USAMassachusetts Inst. of Technology (MIT) University of South CarolinaDepartment of Physics and AstronomyIowa State UniversityCollege of Liberal Arts & SciencesHampton UniversityDepartment of PhysicsJefferson Laboratory

RUSSIARussian Academy of Sciences (RAS)Institute for Nuclear Research (INR)

JAPANOsaka UniversityDepartment of PhysicsNational Defense AcademyDepartment of Applied PhysicsTohoku UniversityResearch Center for Electron Photon ScienceHigh Energy Accel. Research Org. (KEK) Institute of Particle and Nuclear StudiesInstitute of Material Structure ScienceAccelerator LaboratoryKyoto University, Department of PhysicsTokyo Institute of Technology (TiTech) Department of Physics

VIETNAMUniversity of Natural Sciences

20


The TREK CollaborationThe TREK Collaboration

CANADAUniversity of Saskatchewan Department of Physics and EngineeringUniversity of British ColumbiaDepartment of Physics and AstronomyTRIUMFUniversite de MontrealLaboratoire de Physique NucleaireUniversity of ManitobaDepartment of Physics

USAMassachusetts Inst. of Technology (MIT) University of South CarolinaDepartment of Physics and AstronomyIowa State UniversityCollege of Liberal Arts & SciencesHampton UniversityDepartment of PhysicsJefferson Laboratory

RUSSIARussian Academy of Sciences (RAS)Institute for Nuclear Research (INR)

JAPANOsaka UniversityDepartment of PhysicsNational Defense AcademyDepartment of Applied PhysicsTohoku UniversityResearch Center for Electron Photon ScienceHigh Energy Accel. Research Org. (KEK) Institute of Particle and Nuclear StudiesInstitute of Material Structure ScienceAccelerator LaboratoryKyoto University, Department of PhysicsTokyo Institute of Technology (TiTech) Department of Physics

VIETNAMUniversity of Natural SciencesNew collaborators are welcome!

20


Thank You

21


J-PARC March11 Earthquake DamageJ-PARC March11 Earthquake Damage


Highly precise SM values

High sensitivity to LFV beyond SM

Current experimental precision ( NA62, KLOE )

RKSM = ( 2.477 ± 0.001) x 10−5

RSM = (12.352 ± 0.004) x 10−5

RKLFV~ RK

SM(1 ± 0.013)

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

e.g. MSSM with charged-Higgs SUSY-LFV

Lepton Universality in KLepton Universality in Kl2l2 and and l2l2 Decays Decays


N2 / Ne2 ~ 40,000 / 1

σp ~ 1 MeV/c

RK/RK = 0.2%

ΛeP ~ 750 TeV

New Pseudoscalar Interaction --

σt ~ 100 psec

MSSM with charged-Higgs SUSY--LFV

Lepton Flavour UniversalityLepton Flavour Universality


beam Target

n=1.05

Fresnel mirror

PID performance and detector efficiency will be measured & controlled using Ke3 and Kμ3 data.

⊗ beam

Momentum measurement of e+, μ+

TOF measurement between TOF1 and TOF2 e+ trigger by aerogel Cherenkov detector.

β(e+ from Ke2) ~1β(µ+ from K2) ~ 0.92 = 1 / 1.087 Estimated efficiency = 99.2 ± 0.2%

e/e/ Identification – LFU Identification – LFU

Bianchin panic2011 2

Technology

Transcript of Bianchin panic2011 2