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Final results on the μ 3He-capture experiment and perspectives for μp-capture studies

  • A. A. Vorobyov
  • , P. Ackerbauer
  • , A. Adamczak
  • , V. A. Andreev
  • , D. V. Balin
  • , G. A. Beer
  • , W. H. Breunlich
  • , T. Case
  • , K. M. Crowe
  • , H. Daniel
  • , J. Deutsch
  • , P. U. Dick
  • , A. Dijksman
  • , J. Egger
  • , T. Von Egidy
  • , M. P. Faifman
  • , A. A. Fetisov
  • , V. A. Ganzha
  • , J. Govaerts
  • , V. V. Gusev
  • F. J. Hartmann, W. D. Herold, P. Kammel, A. G. Krivshich, B. Lauss, E. M. Maev, V. E. Markushin, J. Martino, J. Marton, L. I. Menshikov, M. Mühlbauer, C. Petitjean, T. Petitjean, G. E. Petrov, L. I. Ponomarev, R. Prieels, W. Prymas, G. N. Schapkin, W. Schöps, W. Schott, G. G. Semenchuk, Yu V. Smirenin, N. I. Voropaev
  • Petersburg Nuclear Phys. Inst.
  • Center for Molecular Medicine of the Austrian Academy of Sciences
  • Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences
  • University of Victoria
  • University of California at Berkeley
  • Technical University of Munich
  • Centre Hospitalier Universitaire (CHU) Mont-Godinne
  • Paul Scherrer Institut
  • National Research Centre "Kurchatov Institute"
  • CEA Saclay

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Muon capture on hydrogen gives a unique possibility for a measurement of the pseudoscalar form factor gp(q2c = -0.88 m2μ) of the nucleonic weak current, thus providing a sensitive test of the QCD chiral symmetry perturbation theory which predicts the value of this form factor with a precision of Agp/gp ≃ 2%. For adequate comparison with theory, the muon capture rate Λc should be measured with a precision of ΔΛcc ≤ 1%, that is an order of magnitude better than the precision of the present world data. We report on the project of an experiment designed to provide the required precision. Also, we present the final result of our previous experiment on a high precision measurement of the μ 3He capture rate and compare this result with the PCAC prediction.

Original languageEnglish
Pages (from-to)13-24
Number of pages12
JournalHyperfine Interactions
Volume118
Issue number1-4
StatePublished - 1999

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