Measurement of Muon Capture on the Proton to 1% Precision and Determination of the Pseudoscalar Coupling g_P
V. A. Andreev, T. I. Banks, R. M. Carey, T. A. Case, S. M. Clayton, K. M. Crowe, J. Deutsch, J. Egger, S. J. Freedman, V. A. Ganzha, T. Gorringe, F. E. Gray, D.… 展开作者
V. A. Andreev, T. I. Banks, R. M. Carey, T. A. Case, S. M. Clayton, K. M. Crowe, J. Deutsch, J. Egger, S. J. Freedman, V. A. Ganzha, T. Gorringe, F. E. Gray, D. W. Hertzog, M. Hildebrandt, P. Kammel, B. Kiburg, S. Knaack, P. A. Kravtsov, A. G. Krivshich, B. Lauss, K. R. Lynch, E. M. Maev, O. E. Maev, F. Mulhauser, C. Petitjean, G. E. Petrov, R. Prieels, G. N. Schapkin, G. G. Semenchuk, M. A. Soroka, V. Tishchenko, A. A. Vasilyev, A. A. Vorobyov, M. E. Vznuzdaev, P. Winter
备注：
Updated figure 1 and small changes in wording to match published version
The MuCap experiment at the Paul Scherrer Institute has measured the rate L_S of muon capture from the singlet state of the muonic hydrogen atom to a precision of 1%. A muon beam was stopped in a time projection chamber filled with 10-bar, ultra-pure hydrogen gas. Cylindrical wire chambers and a segmented scintillator barrel detected electrons from muon decay. L_S is determined from the difference between the mu- disappearance rate in hydrogen and the free muon decay rate. The result is based on the analysis of 1.2 10^10 mu- decays, from which we extract the capture rate L_S = (714.9 +- 5.4(stat) +- 5.1(syst)) s^-1 and derive the proton's pseudoscalar coupling g_P(q^2_0 = -0.88 m^2_mu) = 8.06 +- 0.55.
Determination of the Muon Lifetime in $^{76}$Se with the MONUMENT experiment
University of Zurich（苏黎世大学）；University of Alabama（阿拉巴马大学）；Joint Institute for Nuclear Research（俄罗斯联合核子研究所）；IRFU, CEA, Université Paris-Saclay（法国原子能和替代能源署法国研究和技术中心萨克雷大学 IRFU）；Technical University of Munich（慕尼黑工业大学）；KU Leuven, Institute for Nuclear and Radiation Physics（荷语鲁汶大学核与辐射物理研究所）；Research Center on Nuclear Physics, Osaka University（大阪大学核物理研究中心）；Universiti Teknologi Malaysia（马来西亚理工大学）；Paul Scherrer Institut（保罗谢尔研究所）；Max-Planck-Institut für Kernphysik（马克斯·普朗克核物理研究所）
