T -odd correlation in the K + → π l ν γ decays beyond the standard model

The dependence of the T-odd correlation on the effective Lagrangian parameters in the ${K}^{+}\ensuremath{\rightarrow}\ensuremath{\pi}l\ensuremath{\nu}\ensuremath{\gamma},l=e,\ensuremath{\mu},$ decays is analyzed. It is shown that the observable introduced is a perspective in the search for new physics in the vector and pseudovector sectors of the Lagrangian. As for the scalar and pseudoscalar sectors, T-odd correlation studies will not allow one to improve current restrictions on the parameters of models beyond the standard model.