por
B. Ananthanarayan
(Center for High Energy Physics Bangalore)
→
Europe/Madrid
Sala Reuniones Sotano (Edf. Institutos de Investigación)
Sala Reuniones Sotano
Edf. Institutos de Investigación
Descripción
pi K form factors are crucial for the extraction of the element V_us of the Cabibbo-Kobayashi-Maskawa matrix. We will talk about our recent work based on the method of unitarity bounds, that uses perturbative QCD inputs, to obtain stringent constraints on the slope and curavature parameters of the scalar form factor and compare our findings with those in the literature. The role of soft meson theorems is highlighted, along with the implications of our work in constraining departures from these.