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Precision measurements in free neutron beta decay serve to determine thecoupling constants of beta decay, and offer several stringent tests of theStandard Model. This paper describes the free neutron beta decay programplanned for the Fundamental Physics Beamline at the Spallation Neutron Sourceat Oak Ridge National Laboratory, and puts it into the context of other recentand planned measurements of neutron beta decay observables.

New precision measurements of free neutron beta decay with cold neutrons