Muon Capture on the Deuteron -- The MuSun Experiment

Abstract

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.

arXiv commentProposal for PSI Experiment R-08-01, submitted February 8, 2008

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Cited by in corpus (4)

• Nucleon Axial Radius and Muonic Hydrogen - A New Analysis and Review
• Tritium $\beta$-decay in pionless effective field theory
• Effective Field Theory calculations of $NN\to NN\pi$
• Discovering the New Standard Model: Fundamental Symmetries and Neutrinos