Strange mesons and kaon-to-pion transition form factors from holography

Understand

We present a calculation of the $K_{\ell 3}$ transition form factors using the AdS/QCD correspondence.

• We also solidify and extend our ability to calculate quantities in the flavor-broken versions of AdS/QCD.
• The normalization of the form factors is a crucial ingredient for extracting $|V_{us}|$ from data, and the results obtained here agree well with results from chiral perturbation theory and lattice gauge theory.
• The slopes and curvature of the form factors agree well with the data, and with what results are available from other methods of calculation.