| DATE: |
2007-11-06 16:00 - 17:00 |
| PLACE: |
Room 345, Building 4 |
| TITLE: |
The TWIST Experiment |
| CONTACT: |
Jun Imazato (jun.imazato kek.jp) |
| SPEAKER: |
Prof. Michael D. Hasinoff (University of British Columbia) |
| LANGUAGE: |
English |
| ABSTRACT: |
Muon decay is a purely leptonic interaction and therefore it provides an excellent opportunity to test the standard electroweak model of particle physics. The TRIUMF Weak Interaction Symmetry Test (TWIST) is an experiment specifically designed to improve the measurements of the energy and angle distributions of positrons from polarized muon decay. Since previous experiments have already reached an impressive precision of one part per thousand the technical challenges are enormous. TWIST employs a highly polarized surface muon beam of 29 MeV/c momentum which is stopped in the centre of an array of low-mass, high-precision drift chambers in a 2 Tesla solenoidal magnetic field. The various systematics limiting the final results will be presented. New limits on the mass of a possible right-handed vector boson, WR, in various extended models will be presented. |
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