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Who we are, and what we're doing.
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Internal
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(Password protected.)
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TWIST is an experiment which is designed to measure the decay
distributions of polarized muons to high precision. Distributions
which are differential in energy and angle will be determined to a
precision of parts in 10,000, allowing a determination of the
parameters of the standard model which characterize the muon decay to
a precision 3 to 10 times higher than previously achieved. The
ultimate interest motivating the experiment is the need to better
understand the left-right asymmetry of the weak interaction which has been artificially
incorporated into the standard model.
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News
- August 2011
- Final results for the muon decay P_mu_xi are published:
Phys. Rev. D.84 (2011)205121.
- May 2011
- Final results for the Longitudinal muon spin relaxation in high-purity aluminum and silver are published:
Phys. Rev. B.83 (2011)205121
- January 2011
- Final results for the muon decay parameters are published (open acess):
Phys. Rev. Lett. 106, 041804(2011). Archival papers are
being written.
- 2011
- TWIST's last students, Bueno, Hillairet, and Bayes,
successfully defend their theses and find paid employment in physics.
- October 2009
- A paper
was published in Physical Review D
describing our measurement of the negative muon decay energy
distribution for a pure aluminum target. For the first time in any target,
the precision shows effects that can be attributed to radiative corrections
(preprint).
- July 2008
- A paper on our
most recent measurements of the rho and delta parameter in
muon decay has been published (open access) in Physical
Review D (preprint).
- August 2007
- After another long data taking run, the last data were taken with the TWIST
spectrometer. The experiment shifted focus to analysis.The
spectrometer has been dismantled.
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