2002/02/12 by P. Kammel, Kammel, P., V. Andreev +89
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #Neutrino Physics Research #Nuclear Experiment (nucl-ex) #Particle physics theoretical and experimental studies #nucl-ex
paper · pdf · doi:10.48550/arxiv.nucl-ex/0202011
Int. RIKEN Conf. on Muon Catalyzed Fusion and Related Exotic Atoms, April 2001, Shimoda, Japan, to be published in Hyperfine Interactions
arxiv created 2002/02/12 · openalex publication_date 2002/02/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The aim of the MuCap experiment is a 1% measurement of the singlet capture rate LambdaS for the basic electro-weak reaction mu + p -> n + numu. This observable is sensitive to the weak form-factors of the nucleon, in particular to the induced pseudoscalar coupling constant gP. It will provide a rigorous test of theoretical predictions based on the Standard Model and effective theories of QCD. The present method is based on high precision lifetime measurements of mu- in hydrogen gas and the comparison with the free mu+ lifetime. The mu- experiment will be performed in ultra-clean, deuterium-depleted H2 gas at 10 bar. Low density compared to liquid H2 is chosen to avoid uncertainties due to ppmu formation. A time projection chamber acts as a pure hydrogen active target. It defines the muon stop position in 3-D and detects rare background reactions. Decay electrons are tracked in cylindrical wire-chambers and a scintillator array covering 75% of 4 pi.