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Inelastic Interactions Between 6.8-BeV/c $\pi^-$ Mesons and Nucleons

Birger, N.G. ; Wang, Kangchang ; Trka,Z. ; et al.

Sov.Phys.JETP 14 (1962) 1043-1052, 1962.

Inspire Record 1387796 DOI 10.17182/hepdata.17077

An analysis was made of 355 interactions between 1r- mesons and nucleons. The momentum and angular distributions of the secondary charged particles were measured. Information on 1r0 mesons produced in the interactions has been obtained. The experimental data are compared with the statistical theory. The results suggest that peripheral interactions may exist. In events of low multiplicity (two-prong cases) "one-meson" peripheral interactions play an important role, while in events of large multiplicity an important role is played by interactions not of the one-meson type, among which also central collisions are possible.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

CHARGED PARTICLE MULTIPLICITY DISTRIBUTIONS IN 100-GEV/C ANTI-P D AND PI- D INTERACTIONS

Bergier, A. ; Gennow, H. ; Nilsson, S. ; et al.

Z.Phys.C 5 (1980) 265-274, 1980.

Inspire Record 158288 DOI 10.17182/hepdata.14987

We present data on$\bar pn$ and π− n collisions obtained from an exposure of the 30′' FNAL deuterium filled bubble chamber to a mixed${{\bar p} \mathord{\left/ {\vphantom {{\bar p} {\pi ^ -}}} \right. \kern-\nulldelimiterspace} {\pi ^ -}}$ beam with a momentum of 100 GeV/c. We find that in 17±2% of the collisions with the antiproton there is an interaction on the spectator while for the collisions with π− mesons the corresponding number is 15±2%. The$\bar pn$ and π− n multiplicity distributions have average charged multiplicities of 6.46±0.07 and 6.53±0.08 respectively. The average multiplicities for both types of interactions are slightly smaller than those for the corresponding reactions on hydrogen by an amount that is the same as observed at other energies. As an estimate of$\bar pn$ annihilation we have calculated the difference$\sigma _n (\bar pn) - \sigma _n (pn)$ for each prong numbern. We find an average multiplicity of 9±1, a value close to that for$\bar pp$ annihilation at the same energy. combining our data with lower energy$\bar pn$ annihilation data, we observe that the average negative multiplicity is systematically larger than that for$\bar pp$ annihilation similar to the difference between neutron and proton target data with other beam projectiles.

1 data table

Table 1

No description provided.