Cover
Contents
Ⅰ Introduction
1. Introduction
1.1 Physics Motivation
1.2 K+─>γμ+v Decay
1.3 Transverse Muon pllarization in Kμvγ
2. The E246 Experiment
2.1 Overview of E246 Experiment
2.1.1 Ovrview of Experimental Setup
2.1.2 Principle of PT Measurement
2.1.3 Systematic Error Cancellation Scheme
2.1.3.1 Rotational Symmety
2.1.3.2 Forward-Backward Tagging
2.2 KEK-PS Proton Synchrotron
2.3 Beam Line
2.4 Beam-Line Cerenkov Counter
2.5 Active Target
2.6 Ring Counter
2.7 Toroidal Magnet
2.8 Tracking Chamber
2.9 Photon Detector
2.10 TOF-2 and Polarimeter Trigge Counter
2.11 Muon Polarimeter
2.11.1 Magnetic Field
2.11.2 Polarimeter Veto Counters
2.12 Data Taking
2.12.1 Trigger
2.12.2 Data Acquisition System
Ⅱ Data Analysis
3. Dvent Selection
3.1 Kaon Vertex Reconstruction
3.2 Reconstruction of the Charged Track
3.2.1 MWPC Analysis
3.2.2 Ring Counter Analysis
3.2.3 Momentum adn Tracking Cuts
3.3 Time-of-Flight Analysis
3.4 Photon Detector Analysis
3.5 Kinematic Constraints
3.5.1 Missing Mass Cuts
3.5.2 Missing Energy(Ev)Cut
3.6 Cuts Summary
3.7 Acceptance and Background
3.7.1 Shape and Acceptance of Signal Events
3.7.2 Background Estimation and Background Shape
3.7.3 Background Subtraction Usiong 2γ Data
4. Polarizaton Measurement
4.1 Postitron Counter Analysis
4.1.1 Decay Positron Counting
4.1.2 Dilution of Sensitivity
4.2 Analyzing Power of Muon Polarimeter
4.2.1 Fiducial Volume Selection
4.2.2 Analyzing Power of the Polarimeter
4.3 PT Sensitivity
4.3.1 Estimate of PT Attenuation
4.3.2 Estimate of the PT Sensitivity to New Phusics
4.4 PT Measurement
5. Systematics
5.1 Null Asymmetry Check
5.2 Systematics from Polarimeter
5.2.1 Change of Positron Counter Efficiency
5.2.2 Misalignment of Polarimeter Position
5.2.3 Magnetic Field Asymmetries
5.3 Contribution from Other Detectors
5.3.1 Decay-Plane Rotation
5.3.2 Contributions from Detector Misalignment
5.3.2.1 CsI Barrel Rotation
5.3.2.2 Misalignment of MWPC
5.4 Contributions from Background
5.4.1 Beam Backgrounds
5.4.1.1. Effect to the Polarimenter
5.4.2 Physics Background
5.5 Analysis Bias
5.6 Summary
Ⅲ Conclusions
6. Discussion
6.1 Two-Higgs-Doublet Models with FCNC
6.2 Supersymmetric Models
6.2.1 SUSY Models withour R parity
7. Conclusion
A. Analysis Environment
A1. Real Data Analysis
A2. Monte Carlo Simulation
A2.1 GMC
A2.2 TMC
B. Coordinate system of the Setup
C. Estimation of Kaon Decay-in-Flight Contamination
C1. Method
C2. Result
D. Optimization of Cuts
D1. Cuts Optimization for PT Measurement
Others