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VOLUME 47 (1988) | ISSUE 1 | PAGE 8
Measurement of the form factor for the decay K^-\to \pi^0e_-\vec\nu
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.