Proposed Measurement of the Beta-Neutrino Correlation in Neutron Decay.
Currently, the beta-neutrino asymmetry has the largest uncertainty (4 %) of the neutron decay angular correlations. Without requiring polarimetry this decay parameter can be used to measure λ (ga/gv ), test Cabibbo-Kobayashi-Maskawa (CKM) unitarity limit scalar and tensor currents, and search for Charged Vector Current (CVC) violation. We propose to measure the beta-neutrino asymmetry coeffcient, a, using time-of-flight for the recoil protons. We hope to achieve a systematic uncertainty of σa / a ≈ 1.0 %. After tests at Indiana University's Low Energy Neutron Source (LENS), the apparatus will be moved to the National Institute of Standards and Technology (NIST) where the measurement can achieve a statistical uncertainty of 1 % to 2 % in about 200 beam days.
Physics Department, Hamilton College, Clinton, NY 13323.
B
B
Collett
Physics Department, Hamilton College, Clinton, NY 13323.
R
R
Anderman
Kurchatov Institute, Moscow, Russia.
S
S
Balashov
National Institute of Standards and Technology, Gaithersburg, MD 20899.
F B
FB
Bateman
University of Sussex, United Kingdom.
J
J
Byrne
National Institute of Standards and Technology, Gaithersburg, MD 20899.
M S
MS
Dewey
Department of Physics, Tulane University, New Orleans, LA 70118.
B M
BM
Fisher
Physics Department, Harvard University, Cambridge, MA 02139.
L
L
Goldin
Physics Department, Hamilton College, Clinton, NY 13323.
G
G
Jones
Physics Department, DePauw University, Greencastle, IN 46135.
A
A
Komives
Physics Department, Hamilton College, Clinton, NY 13323.
T
T
Konopka
Indiana University Cyclotron Facility, Bloomington, IN 47408.
M
M
Leuschner
Kurchatov Institute, Moscow, Russia.
Yu
Y
Mostovoy
National Institute of Standards and Technology, Gaithersburg, MD 20899.
J S
JS
Nico
National Institute of Standards and Technology, Gaithersburg, MD 20899.
A K
AK
Thompson
Department of Physics, Tulane University, New Orleans, LA 70118.
C
C
Trull
Department of Physics, Tulane University, New Orleans, LA 70118.
F E
FE
Wietfeldt
Physics Department, Harvard University, Cambridge, MA 02139.
R
R
Wilson
Physics Department, Harvard University, Cambridge, MA 02139.
B G
BG
Yerozolimsky
CKM unitarit; beta decay; beta-neutrino correlation; neutron decay