Abstract
The muon capture rate in hydrogen is a fundamental weak process, particularly sensitive to the pseudo-scalar coupling constant: Fp. Its measurement is very difficult for various reasons1):
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i)
The capture rate is very small compared to the decay rate.
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ii)
The capture rate depends strongly on the initial hyperfine state which has to be known exactly in order to interpret the result.
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iii)
The hydrogen must be extremely pure because of the high cross section for muons to be transferred to deuterium or nuclei.
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iv)
In all the previous experiments the 5 MeV neutron, produced by the reaction, had to be detected amongst an intense background of electrons and γ rays due to muon decays. The main limitation comes from the neutron detector efficiency which has to be computed by sophisticated Monte-Carlo programmes.
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References
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© 1980 Plenum Press, New York
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Duclos, J. (1980). A New Measurement of the Muon Capture Rate in Liquid Hydrogen. In: Crowe, K., Duclos, J., Fiorentini, G., Torelli, G. (eds) Exotic Atoms ’79 Fundamental Interactions and Structure of Matter. Ettore Majorana International Science Series, vol 4. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-3042-4_4
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DOI: https://doi.org/10.1007/978-1-4613-3042-4_4
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