Muon capture on the proton and deuteron |
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Authors: | F Gray |
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Institution: | (1) Department of Physics, Regis University, 3333 Regis Blvd., Denver, CO 80221, USA |
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Abstract: | By measuring the lifetime of the negative muon in pure protium (1H), the MuCap experiment determines the rate of muon capture on the proton, from which the proton’s pseudoscalar coupling
g
p
may be inferred. A precision of 15% for g
p
has been published; this is a step along the way to a goal of 7%. This coupling can be calculated precisely from heavy baryon
chiral perturbation theory and therefore permits a test of QCD’s chiral symmetry. Meanwhile, the MuSun experiment is in its
final design stage; it will measure the rate of muon capture on the deuteron using a similar technique. This process can be
related through pionless effective field theory and chiral perturbation theory to other two-nucleon reactions of astrophysical
interest, including proton-proton fusion and deuteron breakup.
for the MuCap 1] and MuSun 2] Collaborations |
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Keywords: | |
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