Study of Anti-proton - Proton Annihilations Using the Topological Cross-section Differences Between and Interactions at 48.9-{GeV}/
Oct, 1979
17 pages
Published in:
- Phys.Rev.D 21 (1980) 3064
Report number:
- FERMILAB-PUB-79-134-E,
- PU-79-485
Experiments:
Citations per year
Abstract: (APS)
The multiplicity-cross-section differences Δσn between p¯p and pp interactions are determined and are compared with measured annihilations and Δσn at other energies. To the extent that these cross-section differences measure the values of σnA, the topological cross sections for annihilations, we present evidence for a decided break from a single-cluster-model prediction for the parameter f2A−−. Alternatively, a picture of precocious Koba-Nielsen-Olesen scaling in p¯p annihilations leads to a reasonably good representation of f2A−− vs 〈n−A〉 over the whole measured range. We find 〈nA〉=7.57±0.31, DA=2.77±0.10, f2A−−=−1.86±0.20, and 〈nA〉D=2.73±0.15. Finally we observe a remarkable agreement with theoretical prediction for Rn*=Δσnσn+2(pp), an experimental ratio based on a strict application of the counting rules for quark duality diagrams, and we thereby find evidence that in the topological-cross-section difference Δσn the small nonannihilation contribution becomes progressively more negligible as n increases.- INTERPRETATION OF EXPERIMENTS
- ANTI-P P: ANNIHILATION
- ANNIHILATION: ANTI-P P
- P P: INTERACTION
- INTERACTION: P P
- CHANNEL CROSS SECTION: DIFFERENCE
- DIFFERENCE: CHANNEL CROSS SECTION
- MULTIPLE PRODUCTION
- MULTIPLICITY: CROSS SECTION
- CROSS SECTION: MULTIPLICITY
References(36)
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