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Who we are, and what we're doing.
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Internal
Pages
(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 which has been artificially
incorporated into the standard model.
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News
- 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 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.
- 19 December 2006
- This marked the end of the longest TWIST data taking run so far, comprising most of
what should become the data for our final results. Data taking
will continue in May 2007, and analysis remains.
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