Physics – Nuclear Physics
Scientific paper
Oct 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aps..haw.gb124t&link_type=abstract
American Physical Society, 3rd Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan, October 1
Physics
Nuclear Physics
Scientific paper
The question is raised of whether or not parity is maximally violated in the weak interaction, focusing on β decay. Efforts to measure the neutrino asymmetry parameter, Bν, and how it will provide limits on the existence of a new right-handed W boson are described. In this experiment, a magneto-optical trap is used to laser-cool and confine ^37K atoms, which are then polarized using optical pumping techniques. A β-telescope will be used to detect the energy and direction of the e^+s emitted from the decay. This detector will be used in coincidence with a microchannel plate which observes the momentum of the recoiling ^37Ar nucleus. The kinematics of the decay allow us to deduce the neutrino's momentum event-by-event, and so by correlating the neutrino's momentum with the initial nuclear spin, we will be able to make a precision measurement of Bν. The physics of positron detection and constraints on β-telescope design are covered in detail, as well as research into computer simulation methods for the analysis of response functions and the optimization of certain parameters of a β-telescope.
Behling S.
Melconian Dan
TerBeek Russell H.
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