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7th Symposium on Symmetries in Subatomic Physics (SSP), Date: 2018/06/10 - 2018/06/15, Location: GERMANY, Aachen

Publication date: 2019-06-01
Volume: 240
Publisher: Springer

Hyperfine Interactions

Author:

Broussard, LJ
Baeßler, S ; Bailey, TL ; Birge, N ; Bowman, JD ; Crawford, CB ; Cude-Woods, C ; Fellers, DE ; Fomin, N ; Frlež, E ; Gericke, MTW ; Hayen, L ; Jezghani, AP ; Li, H ; Macsai, N ; Makela, MF ; Mammei, RR ; Mathews, D ; McGaughey, PL ; Mueller, PE ; Počanić, D ; Royse, CA ; Salas-Bacci, A ; Sjue, SKL ; Ramsey, JC ; Severijns, N ; Smith, EC ; Wexler, J ; Whitehead, RA ; Young, AR ; Zeck, BA

Keywords:

Science & Technology, Physical Sciences, Physics, Atomic, Molecular & Chemical, Physics, Condensed Matter, Physics, Nuclear, Physics, Neutron beta decay, Nuclear beta decay, Beta spectrum, Silicon detector, BETA-DECAY, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, 0204 Condensed Matter Physics, General Physics, 5102 Atomic, molecular and optical physics, 5104 Condensed matter physics, 5106 Nuclear and plasma physics

Abstract:

© 2018, Springer Nature Switzerland AG. The Nab experiment will measure the ratio of the weak axial-vector and vector coupling constants λ = gA/gV with precision δλ/λ ∼ 3 × 10− 4 and search for a Fierz term bF at a level ΔbF < 10− 3. The Nab detection system uses thick, large area, segmented silicon detectors to very precisely determine the decay proton’s time of flight and the decay electron’s energy in coincidence and reconstruct the correlation between the antineutrino and electron momenta. Excellent understanding of systematic effects affecting timing and energy reconstruction using this detection system are required. To explore these effects, a series of ex situ studies have been undertaken, including a search for a Fierz term at a less sensitive level of ΔbF < 10− 2 in the beta decay of 45Ca using the UCNA spectrometer.