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Positron polarization in the decay of polarized N-12: a precision test of the Standard Model

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Thomas, E. Prieels, René [UCL] Allet, M. Bodek, K. Camps, J. Deutsch, Jules [UCL] Govaerts, Jan [UCL] Sromicki, J.

The longitudinal polarization of positrons emitted along and opposite to the nuclear spin direction has been measured in the decay of polarized N-12. The results are consistent with the Standard Model prediction. In manifest left-right symmetric models this measurement provides a lower bound of 310 GeV/c(2) at 90% CL on the mass of a possible right-handed gauge boson contributing to the electroweak interaction. In generalized versions of this model our measurement provides constraints complementary to those set by high-energy experiments. (C) 2001 Elsevier Science B.V. All rights reserved.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 2001
Language Anglais
Journal information "Nuclear Physics, Section A" - Vol. 694, no. 3-4, p. 559-589 (2001)
Peer reviewed yes
Publisher Elsevier Science Bv (Amsterdam)
issn 0375-9474
e-issn 1873-1554
Publication status Publié
Affiliation UCL - SC/PHYS - Département de physique
Keywords standard model ; longitudinal polarization ; W-R constraints ; polarized N-12 ; positronium time-resolved spectroscopy
Links
Bibliographic reference Thomas, E. ; Prieels, René ; Allet, M. ; Bodek, K. ; Camps, J. ; et. al. Positron polarization in the decay of polarized N-12: a precision test of the Standard Model. In: Nuclear Physics, Section A, Vol. 694, no. 3-4, p. 559-589 (2001)
Permanent URL http://hdl.handle.net/2078.1/42466