105 research outputs found
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 +- 0.7 stat. +- 0.3
syst. This result differs from the world average value (885.7 +- 0.8 s) 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 beta-asymmetry in neutron decay, Ao, of -0.1189(7) is in a good agreement
with the Standard Model.Comment: 11 pages, 9 figures; extended content with some correction
Strongly coupled chameleon fields: possible test with a neutron Lloyd's mirror interferometer
The consideration is presented of possible neutron Lloyd's mirror
interferometer experiment to search for strongly coupled chameleon fields. The
chameleon scalar fields were proposed to explain the early and late time
acceleration of expansion of the Universe. They may produce short-range
interaction between particles and matter. This interaction causes phase shift
of neutron waves in the interferometer. Estimates of sensitivity are performed.Comment: 11 p, 3 fig; the title is changed, extended feasibility
consideration: expected intensity and systematic effect
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