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28 June 2017

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YN scattering data: DO66

Authors: H.G. Dosch, R. Engelmann, H. Filthuth, V. Hepp, E. Kluge
Reference: Phys. Lett. 21 (1966), 236
Group: Heidelberg

The experiment:

In the Saclay 81 cm Hydrogen Bubble Chamber which was exposed to a beam of K- mesons from the Proton-Synchroton at CERN. Reactions of the produced Σ particles were studied. 200000 pictures have been scanned. 446 Σ- p events and 66 Σ+ p events were seen. After applying cut-offs for small angle scattering ( < 14 degrees) 19 Σ+ p events and 59 Σ- p events are analyzed.
Preliminary results are presented in DO65.

The data:

Σ- p → Σ- p total elastic cross section (SGT)
momentum range      number of     SGT [mb]
    [MeV/c]          events

  135 - 145         )          207 +/- 85
  145 - 155         ) 59       198 +/- 48
  155 - 165         )          189 +/- 32
differential cross section (DSG)
based on 130 events in the range 135 - 165 MeV/c

   cos(theta)       DSG [mb]

 -0.4 -  -0.2     90 +/-  20
 -0.2 -   0.0    105 +/-  20
  0.0 -   0.2     80 +/-  20
  0.2 -   0.4    120 +/-  20
  0.4 -   0.6    115 +/-  25
  0.6 -   0.8    200 +/- 110
Σ+ p → Σ+ p total elastic cross section (SGT)
momentum range      number of     SGT [mb]
    [MeV/c]          events

  148 - 158         )          203 +/- 117
  158 - 168         ) 19       143 +/-  58
  168 - 178         )           89 +/-  28
differential cross section (DSG)
based on 30 events in the range 148 - 178 MeV/c

   cos(theta)       DSG [mb]

 -0.4 -  -0.2     40 +/-  20
 -0.2 -   0.0     30 +/-  20
  0.0 -   0.2     40 +/-  20
  0.2 -   0.4     90 +/-  30
  0.4 -   0.6    120 +/-  50
  0.6 -   0.8    170 +/- 110

Notes:


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