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arXiv · 1110.5090

Muon Capture on the Proton

P. Winter
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Abstract

The MuCap experiment measures the singlet rate Lambda_S of muon capture on the proton. A negative muon beam is stopped in a time projection chamber filled with ultra-pure hydrogen gas at 10 bar and room temperature. In combination with the surrounding decay electron detectors, the lifetime of muons in hydrogen can be measured to determine LS to a final precision of 1%. The capture rate is then used to derive the nucleon's pseudoscalar form factor gP. Our first-stage result, gP= 7.3\pm1., will soon be updated with the final analysis of the full statistics reducing the error by a factor of ~2.

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P. Winter. 2011-10-23. Muon Capture on the Proton. https://doi.org/10.1063/1.3700609

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