Measurement of the neutrino-spin correlation parameter B neutron decay using ultracold neutrons
- Los Alamos National Laboratory
We present a new approach to measuring the neutrino-spin correlation parameter B in neutron decay. The approach combines the technology of large-area ion-implanted silicon detectors being developed for the abBA experiment, with an ultracold neutron source to provide more precise neutron polarimetry. The technique detects both proton and electron from the neutron decay in coincidence. B is determined from an electron-energy-dependent measurement of the proton spin asymmetry. This approach will provide a statistical precision of 1 x 10-4 . The systematic precision is still being evaluated, but is expected to be below 1 x 10-3 , and could approach 1 x 10-4 . A measurement of B with this precision would place constraints on supersymmetric extensions to the Standard Model.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC52-06NA25396
- OSTI ID:
- 956453
- Report Number(s):
- LA-UR-09-01091; LA-UR-09-1091; RMXFAT; TRN: US1004072
- Journal Information:
- Revista Mexicana de Fisica, Journal Name: Revista Mexicana de Fisica; ISSN 0035-001X
- Country of Publication:
- United States
- Language:
- English
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