@article{131c5eb6ed5c4b2682bba01573c10b28,
title = "Measurement of the neutrino asymmetry in the β decay of laser-cooled, polarized 37K",
abstract = "A measurement of the neutrino asymmetry is presented which represents the first search for new physics using polarized radioactive atoms initially cooled and confined in a magneto-optical trap. Optical pumping and photoionization techniques are used to generate and measure, in situ, a highly spin-polarized (96.5 (0.8) %) sample of the short-lived β+-emitter 37K. The angular distribution of neutrinos from this polarized decay, inferred from the daughter recoil asymmetry, is used to search for a hypothetical V + A current in the weak interaction. We find the ν asymmetry parameter to be Bν = - 0.755 ± 0.020 (stat) ± 0.013 (syst), in agreement with the standard model's purely V - A interaction.",
keywords = "Atom trapping, Neutrino asymmetry, Nuclear β decay, Optical pumping, Parity violation, Right-handed currents",
author = "D. Melconian and Behr, {J. A.} and D. Ashery and O. Aviv and Bricault, {P. G.} and M. Dombsky and S. Fostner and A. Gorelov and S. Gu and V. Hanemaayer and Jackson, {K. P.} and Pearson, {M. R.} and I. Vollrath",
note = "Funding Information: We acknowledge the support staff of TRIUMF and ISAC, conversations with J. Deutsch and N. Severijns, and computing resources from WestGrid. This work is supported by NRC through TRIUMF, NSERC, CIPI and the Israel Science Foundation. ",
year = "2007",
month = jun,
day = "14",
doi = "10.1016/j.physletb.2007.04.047",
language = "אנגלית",
volume = "649",
pages = "370--375",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
publisher = "Elsevier B.V.",
number = "5-6",
}