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28 April 2017

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YN scattering data: HA77

Authors: J.M. Hauptmann, J.A. Kadyk, G.H. Trilling
Reference: Nucl. Phys. B125 (1977), 29
Group: LRL

The experiment:

Various Λ p events have been recorded in an exposure of the SLAC 82-inch bubble chamber to a 12 GeV/c K- beam. To enhance the flux of Λ-particles a platinum target is placed inside the bubble chamber. 500000 photographs were scanned. A total number of 992 (in)elastic events are analyzed. Most of this experiment and some of the data were already presented in HA74.

The data:

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

  400 -  1200       )         14.8 +/- 1.6
 1200 -  1800       )         17.5 +/- 1.7
 1800 -  2600       )         17.1 +/- 1.7
 2600 -  3600       ) 584     15.3 +/- 1.5
 3600 -  4900       )         11.4 +/- 1.3
 4900 -  6900       )          8.6 +/- 1.2
 6900 - 10000       )          6.5 +/- 1.2
or
momentum range      number of     SGT [mb]
    [MeV/c]          events

  300 -  400                  17.2 +/- 8.6
  400 -  500                  26.9 +/- 7.8
  500 -  600                   7.0 +/- 4.0
  600 -  700                   9.0 +/- 4.0
  700 -  800                  13.6 +/- 4.5
  800 -  900                  11.3 +/- 3.6
  900 - 1000                  11.3 +/- 3.8
 1000 - 1100                  21.1 +/- 4.8
 1100 - 1200                  14.0 +/- 3.4
 1200 - 1300                   9.6 +/- 2.9
 1300 - 1400                  13.5 +/- 3.4
 1400 - 1500                  26.0 +/- 4.8
 1500 - 1600                  16.4 +/- 3.7
 1600 - 1700                  15.9 +/- 4.1
 1700 - 1800                  23.5 +/- 5.0
 1800 - 1900                  23.3 +/- 6.0
 1900 - 2000                  19.8 +/- 4.4
 2000 - 2100                  20.1 +/- 5.6
 2100 - 2200                  16.3 +/- 4.5
 2200 - 2300                  17.6 +/- 5.1
 2300 - 2400                  18.0 +/- 4.8
 2400 - 2500                   9.6 +/- 3.4
Λ p → Σ0 p total cross section (SGT)
momentum range      number of     SGT [mb]
    [MeV/c]          events

  640 -  800        )         8.0 +/- 4.0
  800 - 1000        )         8.5 +/- 3.0
 1000 - 1200        )  35     6.8 +/- 2.5
 1200 - 1500        )         4.8 +/- 2.0
 1500 - 2500        )         1.5 +/- 1.0

Notes:


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