Muon Capture on the Proton

Details Muon Capture on the Proton Muon Capture on the Proton

2011-10-23

arxiv.org/abs/1110.5090v1

Physics

Nuclear Physics

Nuclear Experiment

Talk given at the 19th Particles & Nuclei International Conference (PANIC 2011), 07/24-29 2011, Massachusetts Institute of Tec

Scientific paper

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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