Measurement of the induced pseudoscalar form factor in the capture of polarized muons by Si nuclei
| Autor: | A.V. Salamatin, T. Filipova, V.E. Kovalenko, V. B. Brudanin, V. Vorobel, I. Stekl, Ch. Briançon, A Kachalkin, V. G. Egorov, J. Rak, René Prieels, I. Yutlandov, L. Grenacs, Ts. Vylov, S. Vassiliev, Yu. Shitov, Jules Deutsch, Sh. Zaparov |
|---|---|
| Přispěvatelé: | Lorgeril, Jocelyne, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11) |
| Jazyk: | angličtina |
| Rok vydání: | 1994 |
| Předmět: |
Physics
Nuclear reaction Nuclear and High Energy Physics Quenching (fluorescence) Muon Silicon 010308 nuclear & particles physics [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex] Form factor (quantum field theory) chemistry.chemical_element [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] Coupling (probability) 01 natural sciences Pseudoscalar chemistry 0103 physical sciences Atomic physics 010306 general physics Nuclear Physics |
| Zdroj: | Nuclear Physics A Nuclear Physics A, Elsevier, 1995, 587, pp.577-595 |
| ISSN: | 0375-9474 |
| Popis: | The observation with high-resolution Ge detectors of the 1229 and 2171 keV gamma-rays emitted after the 28Si(μ, ν)28Al(1+, 2202 keV) reaction allowed us to determine the nuclear-amplitude ratio x ≡ M(2) M(−1) characteristic of this muon-capture reaction. Using the nuclear-structure dependent evaluation of various correction terms (model of Ciechanowicz), our result x = +0.254±0.034 provides for the induced pseudoscalar coupling gp the ratio g p g a (0.848m μ 2 ) = 3.4 ± 1.0 , to be compared to the PCAC prediction of g p g a = 7 . The model dependence of this apparent quenching remains to be assessed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|