Study of antiproton-proton annihilations using the topological-cross-section differences between p-barp and pp interactions at 48. 9 GeV/c

Journal Article · Sun Jun 01 04:00:00 EDT 1980 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.21.3064· OSTI ID:5427362

Robertson, R M; Barnes, V E; Carmony, D D; Dauwe, L; Gutay, L J; Zissa, D E

The multiplicity-cross-section differences ..delta..sigma/sub n/ between p-barp and pp interactions are determined and are compared with measured annihilations and ..delta..sigma/sub n/ at other energies. To the extent that these cross-section differences measure the values of sigma/sup A//sub n/, the topological cross sections for annihilations, we present evidence for a decided break from a single-cluster-model prediction for the parameter f/sup A/--/sub 2/. Alternatively, a picture of precocious Koba-Nielsen-Olesen scaling in p-barp annihilations leads to a reasonably good representation of f/sup A/--/sub 2/ vs over the whole measured range. We find =7.57 +- 0.31, D/sup A/=2.77 +- 0.10, f/sup A/--/sub 2/=-1.86 +- 0.20, and /D=2.73 +- 0.15. Finally we observe a remarkable agreement with theoretical prediction for R/sup asterisk//sub n/=..delta..sigma/sub n//sigma/sub n/+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 ..delta..sigma/sub n/ the small nonannihilation contribution becomes progressively more negligible as n increases.

• Research Organization: Department of Physics, Purdue University, West Lafayette, Indiana 47907
• OSTI ID: 5427362
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 21:11; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645205* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions
Baryon No. = 0-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BARYON-BARYON INTERACTIONS
BASIC INTERACTIONS
CLUSTER MODEL
CROSS SECTIONS
DUALITY
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY DEPENDENCE
ENERGY RANGE
EXCHANGE INTERACTIONS
GEV RANGE
GEV RANGE 10-100
HADRON-HADRON INTERACTIONS
INTERACTIONS
MATHEMATICAL MODELS
MATHEMATICS
MULTIPLICITY
NUCLEAR MODELS
NUCLEON-ANTINUCLEON INTERACTIONS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
POSTULATED PARTICLES
PROTON-ANTIPROTON INTERACTIONS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
QUARKS
TOPOLOGY
TOTAL CROSS SECTIONS