SUBTRACTED DISPERSION RELATIONS CURRENT ALGEBRA AND MOMENTUM DEPENDENT KL4 DECAY AXIAL VECTOR FORM FACTORS

Kl4 decay axial vector form factors are considered within the frame of dispersion relations and current algebra. We use subtracted dispersion relations for the form factors, the subtraction term being given by the current commutator contribution and saturate the dispersion integrals by s, t, u channel poles. The scalar meson contributions are however not taken into account. Explicit momentum dependence of the form factors are obtained and the decay rates are found to be in good agreement with the available experimental data. © 1969.