| Autor: |
B. Aas, A. Vacchi, I. Beltrami, G. Strassner, R. Weber, W. Ruckstuhl, W. Beer, Th.v. Ledebur, H.J. Leisi, P.F.A. Goudsmit, W.W. Sapp, U. Kiebele, J.-A. Pinston, G. De Chambrier |
| Rok vydání: |
1986 |
| Předmět: |
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| Zdroj: |
Nuclear Physics A. 451:679-700 |
| ISSN: |
0375-9474 |
| DOI: |
10.1016/0375-9474(86)90299-x |
| Popis: |
Motivated by the importance of scalar particles in the current work on gauge theories of fundamental interactions, we have performed an improved muonic-atom experiment to search for long-range muon-hadron interactions. We remeasured the wavelengths of the 3 d 5 2 −2 p 3 2 X-ray transitions in 24Mg and 28Si with the bent-crystal spectrometer at the SIN muon channel. The relative difference between the X-ray wavelength λexp and the theoretical value as obtained from QED calculations, averaged over the two elements, is λ exp -λ QUED /λ QUED = (-0.2 +-3.1) × 10 6 Assuming the validity of the QED calculations, we can put limits on an additional muon-nucleon interaction: If such an interaction were mediated, for example, by a scalar or vector (isoscalar) boson with a mass smaller than about 1 MeV, the corresponding coupling constant is gμgN ⩽ 0.8 × 10−6 × e2. Alternatively, if additional muon-hadron interactions are negligible, our result corresponds to a 950 ppm test of the vacuum polarisation effect in QED. The result can also be interpreted as a 3 ppm measurement of the negative muon mass. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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