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Title: Measurement of the Transverse Polarization of Electrons Emitted in Free-Neutron Decay
Authors: Kozela, A ×
Ban, G
Bialek, A
Bodek, K
Gorel, P
Kirch, K
Kistryn, St
Kuzniak, M
Naviliat-Cuncic, O
Pulut, J
Severijns, Natalis
Stephan, E
Zejma, J #
Issue Date: 1-May-2009
Publisher: American Physical Society
Series Title: Physical Review Letters vol:102
Article number: 172301
Abstract: Both components of the transverse polarization of electrons (sigma(T1), sigma(T2)) emitted in the beta decay of
polarized, free neutrons have been measured. The T-odd, P-odd correlation coefficient quantifying sigma(T2) ,
perpendicular to the neutron polarization and electron momentum, was found to be R = 0.008 +/- 0.015 +/-
0.005. This value is consistent with time reversal invariance and significantly improves limits on the
relative strength of imaginary scalar couplings in the weak interaction. The value obtained for the
correlation coefficient associated with sigma(T1),N = 0.056 +/- 0.011 +/- 0.005, agrees with the Standard Model
expectation, providing an important sensitivity test of the experimental setup.
ISSN: 0031-9007
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Nuclear and Radiation Physics Section
× corresponding author
# (joint) last author

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