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Journal articles
Measurement of the parameter xi" in polarized muon decay and Implications on exotic couplings of the leptonic weak interaction
R. Prieels
1
O. Naviliat-Cuncic
2, 3
P. Knowles
1
P. van Hove
1
X. Morelle
J. Egger
J. Deutsch
1
J. Govaerts
1
W. Fetscher
K. Kirch
J. Lang
1
UCL - Université Catholique de Louvain (Place de l'Université 1 - 1348 Louvain-La-Neuve - Belgium)
2
LPCC - Laboratoire de physique corpusculaire de Caen (ENSICAEN - 6, boulevard du Marechal Juin 14050 Caen Cedex - France)
- UNICAEN - Université de Caen Normandie (Esplanade de la Paix - CS 14032 - 14032 CAEN Cedex 5 - France)
- NU - Normandie Université (Esplanade de la Paix - CS 14032 - 14032 Caen Cedex 5 - France)
- ENSICAEN - École Nationale Supérieure d'Ingénieurs de Caen (6, Boulevard du Maréchal Juin CS 45053 14050 CAEN cedex 04 - France)
- NU - Normandie Université (Esplanade de la Paix - CS 14032 - 14032 Caen Cedex 5 - France)
- CNRS - Centre National de la Recherche Scientifique : UMR6534 (France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
3
NSCL - National Superconducting Cyclotron Laboratory (1, Cyclotron Lab Michigan State University East Lansing, MI488232 - United States)
- Michigan State University [East Lansing] (220 Trowbridge Rd
East Lansing, MI 48824 - United States)
- Michigan State University System (Michigan - United States)
Abstract : The muon decay parameter ξ'' has been determined in a measurement of the longitudinal polarization of positrons emitted from polarized and depolarized muons. The result, ξ''=0.981±0.045stat±0.003syst, is consistent with the Standard Model prediction of unity, and provides an order of magnitude improvement in the relative precision of this parameter. This value sets new constraints on exotic couplings beyond the dominant V−A description of the leptonic weak interaction.
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http://hal.in2p3.fr/in2p3-01090724
Contributor : Sandrine Guesnon <>
Submitted on : Thursday, December 4, 2014 - 9:43:23 AM
Last modification on : Wednesday, October 23, 2019 - 2:42:03 PM
Contributor : Sandrine Guesnon <>
Submitted on : Thursday, December 4, 2014 - 9:43:23 AM
Last modification on : Wednesday, October 23, 2019 - 2:42:03 PM
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- HAL Id : in2p3-01090724, version 1
- DOI : 10.1103/PhysRevD.90.112003
- ARXIV : 1408.1472
Citation
R. Prieels, O. Naviliat-Cuncic, P. Knowles, P. van Hove, X. Morelle, et al.. Measurement of the parameter xi" in polarized muon decay and Implications on exotic couplings of the leptonic weak interaction. Physical Review D, American Physical Society, 2014, 90, pp.112003. ⟨10.1103/PhysRevD.90.112003⟩. ⟨in2p3-01090724⟩
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