Neutron decay correlations in the Nab experiment
Por:
Broussard, L. J., Alarcon, R., Baessler, S., Barron Palos, L., Birge, N., Bode, T., Bowman, J. D., Brunst, T., Calarco, J. R., Caylor, J., Chupp, T., Cianciolo, V., Crawford, C., Dodson, G. W., DuBois, J., Fan, W., Farrar, W., Fomin, N., Frlez, E., Fry, J., Gericke, M. T., Glueck, F., Greene, G. L., Grzywacz, R. K., Gudkov, V., Hendrus, C., Hersman, F. W., Ito, T., Li, H., Macsai, N., Makela, M. F., Mammei, J., Mammei, R., Martin, J., Martinez, M., McGaughey, P. L., Mertens, S., Mirabal-Martinez, J., Mueller, P., Page, S. A., Penttila, S. I., Picker, R., Plaster, B., Pocanic, D., Radford, D. C., Ramsey, J., Rykaczewski, K. P., Salas-Bacci, A., Scott, E. M., Sjue, S. K. L., Smith, A., Smith, E., Sprow, A., Stevens, E., Wexler, J., Whitehead, R., Wilburn, W. S., Young, A. R., Zeck, B. A.
Publicada:
1 ene 2017
Categoría:
Physics and astronomy (miscellaneous)
Resumen:
The Nab experiment will measure the correlation a between the momenta of
the beta particle and antineutrino in neutron decay as well as the Fierz
term b which distorts the beta spectrum. The a correlation can be used
to extract the quark mixing matrix element V-ud, which is used to
precisely test our understanding of the electroweak interaction. A
non-zero Fierz term would signal the presence of scalar and tensor
currents which must come from new physics beyond the Standard Model of
Particle Physics. Nab uses an asymmetric spectrometer to determine the
proton time-of-light and the beta energy in order to reconstruct the
angular correlation between the electron and antineutrino. The charged
particles are detected using thick, large-area, segmented silicon
detectors, which must be held at a potential of -30 kV to detect the
very low energy protons. A 24 channel prototype system has been tested
and found to meet specifications of 3 keV full-width half maximum (FWHM)
energy resolution at 30 keV, 50 ns signal rise times, and thresholds <
10 keV. The 128 ch fully instrumented detection system is currently in
development. Silicon drift detectors in development by the TRISTAN
collaboration can reach an energy resolution as low as 135 eV FWHM at 6
keV, and could enable the next generation of neutron beta decay
experiments.
Filiaciones:
Broussard, L. J.:
Oak Ridge Natl Lab, Phys Div, Oak Ridge, TN 37831 USA
Alarcon, R.:
Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA
Baessler, S.:
Oak Ridge Natl Lab, Phys Div, Oak Ridge, TN 37831 USA
Univ Virginia, Phys Dept, Charlottesville, VA 22904 USA
Barron Palos, L.:
Univ Nacl Autonoma Mexico, Mexico City 04510, DF, Mexico
Birge, N.:
Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA
Bode, T.:
Max Planck Inst Phys & Astrophys, Fohringer Ring 6, D-80805 Munich, Germany
Bowman, J. D.:
Oak Ridge Natl Lab, Phys Div, Oak Ridge, TN 37831 USA
Brunst, T.:
Max Planck Inst Phys & Astrophys, Fohringer Ring 6, D-80805 Munich, Germany
Calarco, J. R.:
Univ New Hampshire, Dept Phys, Durham, NH 03824 USA
Caylor, J.:
Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA
Chupp, T.:
Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
Cianciolo, V.:
Oak Ridge Natl Lab, Phys Div, Oak Ridge, TN 37831 USA
Crawford, C.:
Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA
Dodson, G. W.:
Oak Ridge Natl Lab, Phys Div, Oak Ridge, TN 37831 USA
DuBois, J.:
Univ Virginia, Phys Dept, Charlottesville, VA 22904 USA
Fan, W.:
Univ Virginia, Phys Dept, Charlottesville, VA 22904 USA
Farrar, W.:
Univ Virginia, Phys Dept, Charlottesville, VA 22904 USA
Fomin, N.:
Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA
Frlez, E.:
Univ Virginia, Phys Dept, Charlottesville, VA 22904 USA
Fry, J.:
Univ Virginia, Phys Dept, Charlottesville, VA 22904 USA
Gericke, M. T.:
Univ Manitoba, Dept Phys, Winnipeg, MB R3T 2N2, Canada
Glueck, F.:
Univ Karlsruhe TH, IEKP, Kaiserstr 12, D-76131 Karlsruhe, Germany
Greene, G. L.:
Oak Ridge Natl Lab, Phys Div, Oak Ridge, TN 37831 USA
Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA
Grzywacz, R. K.:
Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA
Gudkov, V.:
Univ South Carolina, Dept Phys & Astron, Columbia, SC 29208 USA
Hendrus, C.:
Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
Hersman, F. W.:
Univ New Hampshire, Dept Phys, Durham, NH 03824 USA
Ito, T.:
Los Alamos Natl Lab, Phys Div, Los Alamos, NM 87545 USA
Li, H.:
Univ Virginia, Phys Dept, Charlottesville, VA 22904 USA
Macsai, N.:
Univ Manitoba, Dept Phys, Winnipeg, MB R3T 2N2, Canada
Makela, M. F.:
Los Alamos Natl Lab, Phys Div, Los Alamos, NM 87545 USA
Mammei, J.:
Univ Manitoba, Dept Phys, Winnipeg, MB R3T 2N2, Canada
Mammei, R.:
Univ Winnipeg, Dept Phys, Winnipeg, MB R3B 2E9, Canada
Martin, J.:
Univ Winnipeg, Dept Phys, Winnipeg, MB R3B 2E9, Canada
Martinez, M.:
Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA
McGaughey, P. L.:
Los Alamos Natl Lab, Phys Div, Los Alamos, NM 87545 USA
Mertens, S.:
Max Planck Inst Phys & Astrophys, Fohringer Ring 6, D-80805 Munich, Germany
Mirabal-Martinez, J.:
Los Alamos Natl Lab, Phys Div, Los Alamos, NM 87545 USA
Mueller, P.:
Oak Ridge Natl Lab, Phys Div, Oak Ridge, TN 37831 USA
Page, S. A.:
Univ Manitoba, Dept Phys, Winnipeg, MB R3T 2N2, Canada
Penttila, S. I.:
Oak Ridge Natl Lab, Phys Div, Oak Ridge, TN 37831 USA
Picker, R.:
TRIUMF, Vancouver, BC V6T 2A3, Canada
Plaster, B.:
Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA
Pocanic, D.:
Univ Virginia, Phys Dept, Charlottesville, VA 22904 USA
Radford, D. C.:
Oak Ridge Natl Lab, Phys Div, Oak Ridge, TN 37831 USA
Ramsey, J.:
Los Alamos Natl Lab, Phys Div, Los Alamos, NM 87545 USA
Rykaczewski, K. P.:
Oak Ridge Natl Lab, Phys Div, Oak Ridge, TN 37831 USA
Salas-Bacci, A.:
Univ Virginia, Phys Dept, Charlottesville, VA 22904 USA
Scott, E. M.:
Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA
Sjue, S. K. L.:
Los Alamos Natl Lab, Phys Div, Los Alamos, NM 87545 USA
Smith, A.:
Univ Virginia, Phys Dept, Charlottesville, VA 22904 USA
Smith, E.:
Los Alamos Natl Lab, Phys Div, Los Alamos, NM 87545 USA
Sprow, A.:
Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA
Stevens, E.:
Univ Virginia, Phys Dept, Charlottesville, VA 22904 USA
Wexler, J.:
North Carolina State Univ, Phys Dept, Raleigh, NC 27695 USA
Whitehead, R.:
Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA
Wilburn, W. S.:
Los Alamos Natl Lab, Phys Div, Los Alamos, NM 87545 USA
Young, A. R.:
North Carolina State Univ, Phys Dept, Raleigh, NC 27695 USA
Zeck, B. A.:
Los Alamos Natl Lab, Phys Div, Los Alamos, NM 87545 USA
North Carolina State Univ, Phys Dept, Raleigh, NC 27695 USA
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