ISSN:
1434-6052
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The elastic and inelastic $$\bar p$$ p cross sections at 70 GeV/c have been determined in an experiment performed at CERN using BEBC equipped with a TST. The topological cross sections were measured and the moments of the inelastic multiplicity distribution are 〈n c 〉=6.16±0.09, 〈n c 〉/D=2.04±0.05 andf 2 cc =2.97±0.03. The average number of Dalitz pairs per inelastic event is (3.12±0.09)×10−2. Assuming that these all arise from π0 decay the average π0 multiplicity is $$\langle n_{\pi ^0 } \rangle = 2.71 \pm 0.14$$ . The $$\bar p$$ p−pp cross section differences lead to an annihilation cross section σ A = 4.42±0.41 mb and the moments of the annihilation multiplicty distribution are 〈n A 〉=8.0±0.3, 〈n A 〉/D=2.5±0.2 andf 2 A−− =−1.4±0.3. An independent check of σ A was made by investigating fast forward charged and neutral secondary interactions in the TST and in the surrounding neon-hydrogen mixture, and gives a value σ A = 5.0±1.6 mb. The ratio of fast $$\bar n$$ to $$\bar p$$ production in non-annihilation interactions at 70 GeV/c is found to be 0.45±0.11.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01553626
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