Searching for Tensor Currents in the Weak Interaction in the $\beta$-decay of $^{8}$B
ORAL
Abstract
The weak interaction of the Standard Model is well-described by a vector-axial vector, or `V-A', structure, which reproduces both maximal parity violation and left-handed neutrinos in beta-decay. To search for possible tensor contributions to the weak interaction we measure the beta-neutrino correlation coefficient a$_{\beta\nu}$ in the Gamow-Teller beta-decays of $^{8}$Li and $^{8}$B. The $A = 8$ decays are ideal to probe a$_{\beta\nu}$ due to the large Q-value and delayed alpha emission from the excited state $^{8}$Be. These measurements are performed with the Beta decay Paul Trap (BPT) at Argonne National Lab. The BPT is surrounded on 4 sides with double-sided silicon strip detectors which allow the kinematics of decay products to be constrained. In this presentation we will present the first results from the decay of $^{8}$B.
*We acknowledge NSERC, Canada, Contract Nos. SAPPJ-2015-00034 and SAPPJ-2018-00028, the U.S. DOE Contract No. DE-AC02-06CH11357 [ANL] and DE-AC52-07NA27344 [LLNL].
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