$K^{-} - p$ and $K^{-} - n$ Cross Sections in the Momentum Range 1-4 Bev/c

The energy dependence of the

K^{-}

-nucleon total cross sections has been measured over the

K^{-}

momentum range 0.98-3.98 Bev/c.

K^{-} - n

cross sections were obtained by deuterium-hydrogen subtraction, with a correction for screening effects. There is evidence for structure in the

T = 0

K^{-}

-nucleon state in the momentum range 0.98-2.0 Bev/c. This structure is absent in the

T = 1

state. In addition, a measurement was made at 1.95 Bev/c of the angular distribution of the

K^{-} - p

elastic scattering at small angles. The forward-scattering amplitude obtained from the data gives a ratio of real part to imaginary part 0.5±0.2 at

0^{0}

. The corresponding ratio for

π^{-}

mesons at this momentum was found to be

{0.4}_{- 0.4}^{+ 0.2}

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K−−pandK−−nCross Sections in the Momentum Range 1-4 Bev/c