Aug 8 – 13, 2022
Hörsaalzentrum Poppelsdorf
Europe/Berlin timezone

Electroweak box diagrams on the lattice for pion and neutron decay

Aug 10, 2022, 3:20 PM
CP1-HSZ/0.002 (CP1-HSZ) - HS4 (CP1-HSZ)

CP1-HSZ/0.002 (CP1-HSZ) - HS4


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Oral Presentation Standard Model Parameters Standard Model Parameters


Jun-Sik Yoo (LANL)


We present our calculation of radiative correction to the pion and nucleon decay given by the $\gamma W$ box contribution and needed for the determination of $V_{ud}$.
The pion box contribution is computed on five 2+1+1-flavor HISQ ensembles using with Clover action.
The preliminary nucleon box contribution is being analyzed on one ensemble.
In both contributions, the loop momentum is integrated with discrete sums.

Primary authors

Boram Yoon (Los Alamos National Laboratory) Jun-Sik Yoo (LANL) Rajan Gupta (Los Alamos National Laboratory) Santanu Mondal (Los Alamos National Laboratory) Tanmoy Bhattacharya (Los Alamos National Laboratory)

Presentation materials