Jun 2 – 7, 2019
Carnegie Mellon University
America/New_York timezone

Improving our understanding of the axial structure of the nucleon with lattice QCD: a march towards relevancy

Jun 7, 2019, 10:15 AM
Rangos 3

Rangos 3

Contributed Electroweak Probes Electroweak Probes


André Walker-Loud (Lawrence Berkeley National Laboratory)


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)

Presentation materials