1998/11/09 by Myung-Ki Cheoun, Myung Ki Cheoun, K.S.Kim +9
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #Nuclear Theory (nucl-th) #Nuclear physics research studies #Particle physics theoretical and experimental studies #nucl-th
paper · pdf · doi:10.48550/arxiv.nucl-th/9811025
11 pages, 3 figures
arxiv created 1998/11/09 · openalex publication_date 1998/11/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The recent TRIUMF experiment for μ- p → n νμ γ gave a surprising result that the induced pseudoscalar coupling constant gP was larger than the value obtained from μ- p → n νμ experiment as much as 44 %. Reexamining contribution of the axial vector current in electromagnetic interaction, we found an additional term to the matrix element which was used to extract the gP value from the measured photon energy spectrum. This additional term, which plays a key role to restore the reliability of gP (- 0.88 mμ2) = 6.77 gA (0), is shown to affect the gP quenching problems in nucleus.