YN scattering data: AL64
| Authors: |
G. Alexander,
U. Karshon,
A. Shapir,
G. Yekutieli,
R. Engelmann,
H. Filthuth,
A. Fridman,
A. Minguzzi-Rangi
|
| Reference: |
Phys. Rev. Lett. 13 (1964), 484.
|
| Group: |
Heidelberg/Rehovoth
|
The experiment:
50 elastic Λ p events have been recorded in an exposure
of the Saclay 81 cm hydrogen bubble chamber at CERN to a beam of
stopping K- mesons.
20.550 films were scanned; XX events were found of which 44
events were used in the final analysis.
The presented results were `preliminary'; the final results
are presented in AL68
The data:
|
Λ p → Λ p
|
total elastic cross section (SGT)
|
|
|
momentum range effective mean number of SGT [mb]
[MeV/c] momentum [MeV/c] events
120 - 190 162 10 118 +/- 37
190 - 250 226 23 100 +/- 21
250 - 320 267 11 67 +/- 20
|
|
|
F/B ratio
|
|
|
momentum range number of F/B
[MeV/c] events
220 - 320 52 2.1 +/- 0.8
|
Notes:
-
An attempt is made to determine the up-down asymmetry
-α*P = 2(U-D)/(U+D)
For 220-320 MeV and -0.5 < cos(theta) < 0.5, -α*P = -0.22 +/- 0.47
-
Errors are statistical only
-
Corrections have been made for varying cut-offs: small angle scatter
events could not be detected
