Measurement of the form factor for the decay
![K^-\to \pi^0e_-\vec\nu](/img/latex/69/69b0a8d9aa90075f98b5f63260020089-v2.png)
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.