Λ p scattering data
This is a list of all Λ p scattering data that are known to us
with a final state consisting of a hyperon and a nucleon.
Apart from the elastic channel, the Λ p system couples
also to two inelastic hyperon-nucleon channels:
This list gives the observables per channel, where the tables are
made per observable. These measurements are ordered on their momentum range.
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Λ p → Λ p
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The list is divided into tables with the same observables. Observables
for elastic Λ p scattering that have been measured are:
Some papers present their results in two ways (different momentum bins).
In such cases we have arbitrarily chosen one. For more details, follow the
links to the given references.
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Total elastic cross-section
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momentum range number of SGT (mb) reference
(MeV/c) events
120 - 150 34 212 +/- 36 AL68
120 - 150 14 209 +/- 58 SE68
150 - 180 48 141 +/- 20 AL68
150 - 180 28 177 +/- 38 SE68
150 - 400 11 34 +/- 10 PI64
150 - 600 6 22 +/- 10 GR63
180 - 210 80 141 +/- 16 AL68
180 - 210 49 153 +/- 27 SE68
200 - 400 24.0 +/- 5.0 KA71
210 - 240 88 95 +/- 10 AL68
210 - 240 54 111 +/- 18 SE68
240 - 270 92 81 +/- 8 AL68
240 - 270 59 87 +/- 13 SE68
270 - 320 36 56 +/- 9 AL68
270 - 330 20 46 +/- 11 SE68
300 - 400 17.2 +/- 8.6 HA77
400 - 500 26.9 +/- 7.8 HA77
400 - 600 9.0 +/- 2.0 KA71
400 - 638 7 24.7 +/- 9.3 AL61
400 - 700 14.0 +/- 3.5 CL67
400 - 1500 42 +/- 16 AR62
500 - 600 7.0 +/- 4.0 HA77
500 - 1000 4 40 +/- 20 CR59
500 - 1000 20 22.2 +/- 5.0 CH70
500 - 1200 86 25 +/- 4 BE64
600 - 700 16.5 +/- 3.5 KA71
600 - 700 9.0 +/- 4.0 HA77
600 - 1500 20 19 +/- 5 GR63
639 - 1000 7 20.4 +/- 7.7 AL61
700 - 800 10.8 +/- 2.7 KA71
700 - 800 13.6 +/- 4.5 HA77
700 - 1000 15.5 +/- 3.5 CL67
800 - 900 10.2 +/- 2.7 KA71
800 - 900 11.3 +/- 3.6 HA77
900 - 1000 9.0 +/- 2.7 KA71
900 - 1000 11.3 +/- 3.8 HA77
1000 - 1100 21.1 +/- 4.8 HA77
1000 - 1200 13.0 +/- 2.4 KA71
1000 - 1300 17.0 +/- 4.0 CL67
1000 - 1500 21 12.9 +/- 2.8 CH70
1000 - 2000 22 22.3 +/- 5.8 AN75
1000 - 2250 25 12 +/- 4 BA67
1100 - 1200 14.0 +/- 3.4 HA77
1200 - 1300 9.6 +/- 2.9 HA77
1200 - 1400 11.5 +/- 2.6 KA71
1300 - 1400 13.5 +/- 3.4 HA77
1400 - 1500 26.0 +/- 4.8 HA77
1400 - 1600 12.0 +/- 3.2 KA71
1500 - 1600 16.4 +/- 3.7 HA77
1500 - 2000 37 22.0 +/- 3.6 CH70
1500 - 2500 30 +/- 15 AR62
1500 - 3900 12 15 +/- 4 VI66
1600 - 1700 15.9 +/- 4.1 HA77
1600 - 1800 13.0 +/- 3.8 KA71
1700 - 1800 23.5 +/- 5.0 HA77
1800 - 1900 23.3 +/- 6.0 HA77
1800 - 2000 15.5 +/- 8.6 KA71
1900 - 2000 19.8 +/- 4.4 HA77
2000 - 2100 20.1 +/- 5.6 HA77
2000 - 2500 28 16.1 +/- 3.1 CH70
2000 - 3000 16 16.3 +/- 4.8 AN75
2100 - 2200 16.3 +/- 4.5 HA77
2200 - 2300 17.6 +/- 5.1 HA77
2250 - 3500 27 9 +/- 3 BA67
2300 - 2400 18.0 +/- 4.8 HA77
2400 - 2500 9.6 +/- 3.4 HA77
2500 - 3000 12 11.0 +/- 3.2 CH70
2600 - 3600 15.3 +/- 1.5 HA77
3000 - 4000 13 12.5 +/- 3.4 CH70
3000 - 4000 12 14.4 +/- 4.8 AN75
3500 - 5000 8 9 +/- 4 BA67
3600 - 4900 11.4 +/- 1.3 HA77
4000 - 5000 7 7.7 +/- 3.2 AN75
4900 - 6900 8.6 +/- 1.2 HA77
5000 - 6000 4 6.2 +/- 3.3 AN75
6000 - 17000 8 4.1 +/- 1.6 AN75
6900 - 10000 6.5 +/- 1.2 HA77
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F/B ratio
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momentum range number of F/B
(MeV/c) events
180 - 210 80 1.01 +/- 0.24 AL68
180 - 248 0.9 +/- 0.2 SE68
210 - 240 88 1.27 +/- 0.28 AL68
240 - 270 92 1.29 +/- 0.27 AL68
248 - 330 1.8 +/- 0.4 SE68
270 - 320 36 1.55 +/- 0.53 AL68
200 - 400 0.66 +/- 0.44 CL67
400 - 700 1.19 +/- 0.41 CL67
700 - 1000 1.15 +/- 0.35 CL67
1000 - 1300 1.33 +/- 0.49 CL67
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P/E ratio
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momentum range number of P/E
(MeV/c) events
180 - 210 80 0.87 +/- 0.22 AL68
210 - 240 88 0.79 +/- 0.19 AL68
240 - 270 92 1.12 +/- 0.24 AL68
270 - 320 36 0.99 +/- 0.34 AL68
200 - 400 0.68 +/- 0.42 CL67
400 - 700 1.32 +/- 0.46 CL67
700 - 1000 1.70 +/- 0.54 CL67
1000 - 1300 1.67 +/- 0.25 CL67
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Angular distribution
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SE68
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angular distribution average over the range 180 - 248 MeV/c
cos(theta) number of events
-1.0 - -0.75 20.0 +/- 4.0
-0.75 - -0.5 25.0 +/- 5.0
-0.5 - -0.25 32.0 +/- 6.0
-0.25 - 0.0 23.4 +/- 5.0
0.0 - 0.25 22.0 +/- 4.0
0.25 - 0.5 25.5 +/- 4.6
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SE68
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angular distribution averaged over the range 248 - 330 MeV/c
cos(theta) number of events
-1.0 - -0.75 7.8 +/- 3.3
-0.75 - -0.5 9.3 +/- 3.3
-0.5 - -0.25 7.5 +/- 3.1
-0.25 - 0.0 11.1 +/- 3.5
0.0 - 0.25 23.4 +/- 4.0
0.25 - 0.5 22.0 +/- 4.0
0.5 - 0.75 25.0 +/- 6.6
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Λ p → Σ0 p
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Total elastic cross-section
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momentum range number of SGT (mb) reference
(MeV/c) events
639 - 1000 3 8.5 +/- 4.9 AL61
640 - 800 8.0 +/- 4.0 HA77
650 - 700 2.8 +/- 2.0 KA71
660 - 4000 11 1.5 +/- 0.5 CH70
700 - 800 7.5 +/- 2.5 KA71
800 - 900 10.6 +/- 3.0 KA71
800 - 1000 8.5 +/- 3.0 HA77
900 - 1000 5.0 +/- 2.0 KA71
1000 - 1200 3.5 +/- 1.5 KA71
1000 - 1200 6.8 +/- 2.5 HA77
1200 - 1400 3.8 +/- 1.7 KA71
1200 - 1500 4.8 +/- 2.0 HA77
1400 - 1600 2.8 +/- 1.7 KA71
1500 - 2500 1.5 +/- 1.0 HA77
1600 - 2000 4.8 +/- 3.4 KA71
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Λ p → Σ+ n
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Total elastic cross-section
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momentum range number of SGT (mb) reference
(MeV/c) events
740 - 800 2 30 +/- 20 CR59
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