Precision muon lifetime and capture experiments at PSI

F. E. Gray, K. M. Crowe, B. Lauss, R. M. Carey, W. Earle, A. Gafarov, B. Graf, M. Hance, M. Hare, I. Logashenko, K. R. Lynch, Y. Matus, J. P. Miller, B. L. -Roberts, J. Wasserman, D. Chitwood, S. M. Clayton, P. T. Debevec, D. W. Hertzog, P. KammelB. Kiburg, R. McNabb, F. Mulhauser, C. J.G. Onderwater, C. S. Özben, C. C. Polly, D. Webber, C. W. Arnold, K. Giovanetti, J. Mace, A. W. Werner, W. R. Wiita, S. Cheekatamalla, M. Deka, S. Dhamija, T. Gorringe, Y. Jia, S. Tripathi, T. I. Banks, T. A. Case, S. J. Freedman, J. Paley, A. Sharp, M. Ojha, P. Zolnierzcuk, L. Bonnet, J. Deutsch, J. Govaerts, D. Michotte, R. Prieels, F. J. Hartman, P. U. Dick, A. Dijksman, A. Egger, D. Fahrni, M. Hildebrant, A. Hofer, L. Meier, C. Petitjean, R. Schmidt, V. A. Andreev, B. Besymjannykh, A. A. Fetisov, V. A. Ganzha, V. I. Jatsoura, P. Kravtsov, A. G. Krivsich, E. M. Maev, O. E. Maev, G. E. Petrov, S. Sadetsky, G. N. Schapkin, G. G. Semenchuk, M. Soroka, V. Trofimov, A. Vasiliev, A. A. Vorobyov, M. Vznuzdaev

Research output: Contribution to journalArticlepeer-review


The μLan experiment at the Paul Scherrer Institute will measure the lifetime of the positive muon with a precision of 1 ppm, giving a value for the Fermi coupling constant GF at the level of 0.5 ppm. Meanwhile, by measuring the observed lifetime of the negative muon in pure hydrogen, the μCap experiment will determine the rate of muon capture, giving the proton's pseudoscalar coupling gp to 7%. This coupling can be calculated precisely from heavy baryon chiral perturbation theory and therefore permits a test of QCD's chiral symmetry.

Original languageEnglish (US)
Pages (from-to)344-347
Number of pages4
JournalNuclear Physics B - Proceedings Supplements
StatePublished - Dec 2005
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics


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