Particle Physics with Neutrons at the ESS

Session

Precision neutron decay (1)

Dec 13, 2018, 10:50 AM

Geovetenskaps hus (room:Högbomsalen), Stockholm University

278. New Physics effects in neutron beta decay: a theory view

Martin Gonzales-Alonso

12/13/18, 10:50 AM

279. Precise theory predictions in neutron decay

Dr Andrzej Czarnecki

12/13/18, 11:20 AM

280. Precise theory predictions in neutron beta decay: current limitations and challenges

Dr Mikhail Gorshteyn

12/13/18, 11:45 AM

I review recent progress in calculating the hadron structure-dependent radiative corrections to the neutron beta-decay. An application of dispersion relations to the $\gamma W$-box allowed to provide a data-driven estimate of the uncertainty of this calculation, reducing the hadronic uncertainty by almost a factor 2.

281. First-principles lattice QCD calculations of the neutron beta decay: challenges and prospects

Dr Enrico Rinaldi

12/13/18, 12:10 PM

Measurements of the neutron lifetime and CKM matrix elements have evolved to become high-precisions tests of the existence of new physics. Thanks to the Standard Model relation between the neutron lifetime, the axial coupling $g_A$ of the neutron, and the CKM matrix element $V_{ud}$, we can use a QCD calculation of $g_A$ and $V_{ud}$ to learn about neutron decay from first-principles....