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26 April 2024

» arxiv » 1004.1754

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Muon Capture on the Deuteron -- The MuSun Experiment
V.A. Andreev ; R.M. Carey ; V.A. Ganzha ; A. Gardestig ; T. Gorringe ; F.E. Gray ; D.W. Hertzog ; M. Hildebrandt ; P. Kammel ; B. Kiburg ; S. Knaack ; P.A. Kravtsov ; A.G. Krivshich ; K. Kubodera ; B. Lauss ; K.R. Lynch ; E.M. Maev ; O.E. Maev ; F. Mulhauser ; F. Myhrer ; C. Petitjean ; G.E. Petrov ; R. Prieels ; G.N. Schapkin ; G.G. Semenchuk ; M.A. Soroka ; V. Tishchenko ; A.A. Vasilyev ; A.A. Vorobyov ; M.E. Vznuzdaev ; P. Winter ;
Date:	11 Apr 2010
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 $ u+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.
Source:	arXiv, 1004.1754
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