Speaker
Dr
Taegil Bae
(KISTI)
Description
The kaon semileptonic decay (Kl3) form factor is important to test the first row unitarity of the CKM matrix. We calculate the form factor at zero momentum transfer using staggered fermions on the lattices. To confirm that the calculation code gives the correct result, we need have tests in the gauge invariance and a Ward identity. Gauge invariance test consists of generating random SU(3) matrices, transforming the gauge links using them, and comparing the result with the original result. A Ward identity physically relates the vector current and the scalar density amplitudes. In the lattice data, we make sure that this identity is satisfied.
