2005/06/01 by Bernhard Lauss, Lauss, Bernhard
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Nuclear Experiment (nucl-ex) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #nucl-ex
paper · pdf · doi:10.48550/arxiv.nucl-ex/0506003
Proceedings of the Intern. Conference on Exotic Atoms, EXA'05, Feb. 21 - 25, 2005, Vienna, Austria, to be published by the Austrian Academy of Sciences Press. 10 pages, 11 figures
arxiv created 2005/06/01 · openalex publication_date 2005/06/01 · arxiv updated 2010/11/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We discuss two precision experiments which will measure fundamental weak interaction parameters: MuLAN's goal is the measurement of the positive muon lifetime to 1 ppm, which will in turn determine the Fermi coupling constant GF to 0.5 ppm precision. MuCAP is the first experiment which will unambiguously determine the induced pseudoscalar form factor of the proton, gp. While contradictory experimental results for gp are under discussion, firm theoretical calculations on the percent level within the framework of Chiral Perturbation Theory are now challenging the measurements. We will describe our experimental efforts and latest achievements.