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The reaction π+p→π+π+n was studied in the vicinity of the reaction threshold at ten incident pion beam momenta from 297 MeV/c to 480 MeV/c. From data angular distributions, invariant mass spectra and integrated cross-sections were deduced. The chiral symmetry breaking parameter as determined by this reaction equals to ξ=1.56±0.26±0.39, where the first error is experimental, while the latter reflects the uncertainty in the ansatz used in the extrapolation to the reaction threshold. A comparison with the other reaction channels of the reaction πp→ππN indicates that a single parameter (ξ) is not sufficient to describe low energy ππ interactions.

1 data table

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pi0 AND eta MESONS PRODUCTION IN THE HADRON - NUCLEAR INTERACTIONS AT 10.5-GeV/c

Akimenko, S.A. ; Bannikov, A.V. ; Belousov, V.I. ; et al.

Sov.J.Nucl.Phys. 38 (1983) 732, 1983.

Inspire Record 189187 DOI 10.17182/hepdata.41132

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14 data tables

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NUCLEAR INTERACTIONS OF 21-GEV/C PROTONS AND 50-GEV/C NEGATIVE PIONS IN EMULSIONS EXPOSED IN A STRONG MAGNETIC FIELD

Azimov, S.A. ; Chernova, L.P. ; Chernov, G.M. ; et al.

Z.Phys.A 300 (1981) 47-61, 1981.

Inspire Record 170097 DOI 10.17182/hepdata.16614

Incoherent nuclear interactions of 21 GeV/c protons and 50 GeV/cπ−-mesons in emulsions exposed in a strong (180 kG) magnetic field have been investigated. The following topics are covered: the multiplicity of various types of charges secondaries, general features of one-particle rapidity and transverse momentum distributions, energy partitions among secondaries, characteristics of the leading particles and relativistic recoil protons, correlation relations. The experimental data are compared with predictions of current models of nuclear production.

12 data tables

Table 1

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