Measurement of the Neutron Lifetime Using a Gravitational Trap and a Low-Temperature Fomblin Coating.
We present a new value for the neutron lifetime of 878.5 ± 0.7stat. ± 0.3syst. This result differs from the world average value by 6.5 standard deviations and by 5.6 standard deviations from the previous most precise result. However, this new value for the neutron lifetime together with a β-asymmetry in neutron decay, A 0, of -0.1189(7) is in a good agreement with the Standard Model.
Petersburg Nuclear Physics Institute, Russian Academy of Sciences, 188300 Gatchina, Leningrad District, Russia.
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Serebrov
Petersburg Nuclear Physics Institute, Russian Academy of Sciences, 188300 Gatchina, Leningrad District, Russia.
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Varlamov
Petersburg Nuclear Physics Institute, Russian Academy of Sciences, 188300 Gatchina, Leningrad District, Russia.
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Kharitonov
Petersburg Nuclear Physics Institute, Russian Academy of Sciences, 188300 Gatchina, Leningrad District, Russia.
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Fomin
Joint Institute for Nuclear Research, Dubna, Moscow Region, 141980, Russia.
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Pokotilovski
Institut Max von Laue-Paul Langevin, B.P. 156, 38042 Grenoble Cedex 9, France.
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Geltenbort
Institut Max von Laue-Paul Langevin, B.P. 156, 38042 Grenoble Cedex 9, France.
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Butterworth
Petersburg Nuclear Physics Institute, Russian Academy of Sciences, 188300 Gatchina, Leningrad District, Russia.
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Krasnoschekova
Petersburg Nuclear Physics Institute, Russian Academy of Sciences, 188300 Gatchina, Leningrad District, Russia.
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Lasakov
Petersburg Nuclear Physics Institute, Russian Academy of Sciences, 188300 Gatchina, Leningrad District, Russia.
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Tal'daev
Petersburg Nuclear Physics Institute, Russian Academy of Sciences, 188300 Gatchina, Leningrad District, Russia.
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Vassiljev
Petersburg Nuclear Physics Institute, Russian Academy of Sciences, 188300 Gatchina, Leningrad District, Russia.
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Zherebtsov
neutron lifetime; ultracold neutrons