Speaker
André Walker-Loud
(Lawrence Berkeley National Laboratory)
Description
Following on our recent per-cent-level determination of $g_A$, I will describe our efforts to reduce the theoretical uncertainty from 1% to 0.2%, a level at which we will have a 4-sigma discriminating prediction of the neutron lifetime, to match the level of precision of the current experimental discrepancy. I will describe the challenges that must be overcome and our progress to doing so using the new pre-exascale super computers. I will also describe our new calculations of the axial form factor. Providing a standard model prediction for this form factor will improve the prospects of the neutrino beam experiments identifying sources of new physics, including the CP-violating phase of the neutrino mixing matrix (PMNS matrix).
Primary author
André Walker-Loud
(Lawrence Berkeley National Laboratory)
