PBAR P --> LAMBDA LAMBDABAR
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Study of the reactions anti-p p ---> anti-lambda lambda, anti-lambda sigma0 or anti-sigma0 lambda, anti-sigma+ sigma+ at 3.6 gev/c

Atherton, H.W. ; French, B.R. ; Moebes, J.P. ; et al.
Nucl.Phys.B 69 (1974) 1-14, 1974.
Inspire Record 94822 DOI 10.17182/hepdata.32345

The reactions p p → Λ Λ, Λ Σ 0 or Σ 0 Λ, Σ + Σ + are studied at an incident momentum of 3.6 GeV/ c in a 35.4 event/μb experiment performed in the CERN 2m HBC. Total and differential cross sections are presented. The polarization of the hyperons is measured as a function of t and for the reaction p p → Λ Λ the complete spin correlation matrix is given.

4 data tables
Table 1

35.4 event/mub data sample used.

Table 2

35.4 event/mub data sample used.

Table 3

35.4 event/mub data sample used.

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Study of the reaction anti-p p ---> Anti-lambda Lambda below 6-MeV excess energy

Barnes, P.D. ; Birien, P. ; Breunlich, W.H. ; et al.
Phys.Lett.B 331 (1994) 203-210, 1994.
Inspire Record 382628 DOI 10.17182/hepdata.28665

The reaction p p → Λ Λ → p π + pπ − is studied in the experiment PS185 at the CERN Low Energy Antiproton Ring (LEAR). A precise measurement of the excitation function in the immediate threshold region below 6 MeV excess energy was achieved. The total cross section shows an unexpected behaviour around 1 MeV excess energy.

2 data tables
Table 1

The values are calculated using M(p)=M(pbar) = 938.27231 Mev and M(lambda)=M(lambdabar) = 1115.63 MeV.

Table 2

D(SIG)/D(OMEGA) as a function of COS(THETA(RF=CM)) for the nine intervals of the excess energy. Excess energy is SQRT(S)-M(lambda)-M(lambdabar).