Measurement of the form factor for the decay
Bolotov V. N., Gninenko S. N., Dzhilkibaev R. M., Isakov V. V., Klubakov Yu. M., Laptev V. D., Lobashev V. M., Marin V. N. , Poblaguev A. A., Postoev V. E., Toropin A. N.
The q2 dependence of the vector form factor f+ has been studied in К ^ decay. The functional dependence is written in the form/+ (q2) =/+(0) (1 -\A+q2/ml.). For the parameter Л+, the valueA+ = 0.029 + 0.004 is found. Radiative corrections increase the value of Я + by 0.002. An experimental constraint on the branching ratio of the К ^ decay has been found for the first time: B.R. (К ^ ) <3.5X10~4.