Beta asymmetry parameter in the decay of 114In
| Autor: | Wauters, F., De Leebeeck, V., Kraev, I., Tandecki, M., Traykov, E., Van Gorp, S., Severijns, N., Zakoucky, D. |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Phys.Rev.C80:062501,2009 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevC.80.062501 |
| Popis: | The beta asymmetry parameter A for the pure Gamow-Teller decay of 114In is reported. The low temperature nuclear orientation method was combined with a GEANT4 based simulation code allowing for the first time to address in detail the effects of scattering and of the magnetic field. The result, A = -0.994 +/- 0.010stat +/- 0.010syst, constitutes the most accurate value for the asymmetry parameter of a nuclear beta transition to date. The value is in agreement with the Standard Model prediction of A = -1 and provides new limits on tensor type charged weak currents. Comment: 11 pages, 2 figures; additional information was added on systematic effects, the magnetic field map and the calculation of the Qcos(theta) values |
| Databáze: | arXiv |
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