3 papers
hep-ph2025
The correction to superallowed beta decays in effective field theory and implications for
Zehua Cao, Richard J. Hill, Ryan Plestid +1
Superallowed () beta decays currently provide the most precise extraction of quark mixing in the Standard Model. Their interpretation as a measurement of $|V_{ud…
hep-ph2025
The Fermi function and the neutron's lifetime
Peter Vander Griend, Zehua Cao, Richard Hill +1
The traditional Fermi function ansatz for nuclear beta decay describes enhanced perturbative effects in the limit of large nuclear charge and/or small electron velocity . W…
hep-ph2025
Factorization and resummation of QED radiative corrections for neutron beta decay
Zehua Cao, Richard J. Hill, Ryan Plestid +1
Details of the two-loop analysis of long-distance QED radiative corrections to neutron beta decay are presented. Explicit expressions are given for hard, jet, and soft functions ap…