Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2010-04-11
Physics
Nuclear Physics
Nuclear Experiment
Proposal for PSI Experiment R-08-01, submitted February 8, 2008
Scientific paper
We propose to measure the rate \Rd\ for muon capture on the deuteron to better than 1.5% precision. This process is the simplest weak interaction process on a nucleus that can both be calculated and measured to a high degree of precision. The measurement will provide a benchmark result, far more precise than any current experimental information on weak interaction processes in the two-nucleon system. Moreover, it can impact our understanding of fundamental reactions of astrophysical interest, like solar pp fusion and the $\nu+d$ reactions observed by the Sudbury Neutrino Observatory. Recent effective field theory calculations have demonstrated, that all these reactions are related by one axial two-body current term, parameterized by a single low-energy constant. Muon capture on the deuteron is a clean and accurate way to determine this constant. Once it is known, the above mentioned astrophysical, as well as other important two-nucleon reactions, will be determined in a model independent way at the same precision as the measured muon capture reaction.
Andreev Anatoly V.
Carey Michael R.
Ganzha V. A.
Gardestig Anders
Gorringe Tim
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