PBAR P --> PBAR N(1700B)+
[2.0, 5.0]
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Single Pion Production in anti-Proton-Proton Interactions

Stenbacka, R. ; Ekspong, G. ; Holmgren, S.O. ; et al.
Nucl.Phys.B 135 (1978) 20-44, 1978.
Inspire Record 134909 DOI 10.17182/hepdata.35129

Single-pion production in p p interactions at 9.1 GeV/ c is analysed and cross sections are given. The p lab dependence of the isospin amplitudes is determined by a fit to the world data. The data are also compared with the predictions of a reggeized Deck model. The results and the N π N amplitudes are compared with the results at other energies and with the corresponding N π N amplitudes.

2 data tables
Table 1

MEASUREMENTS FROM OTHER EXPERIMENTS DOWN TO PLAB = 1 GEV ALSO QUOTED.

Table 2

No description provided.


Hyperon-anti-Hyperon Production in anti-p p Interactions at 3.6-GeV/c Leading to 3 Or More Particles in the Final State

French, B.R. ; Moebes, J. ; Pols, C. ;
Nucl.Phys.B 119 (1977) 237-252, 1977.
Inspire Record 110545 DOI 10.17182/hepdata.35525

Results are presented on the properties of the p p interactions at 3.6 GeV/ c leading to a hyperon or an antihyperon in final states with ⩾3 particles from an experiment of 35 eV/μb sensitivity. Results of amultidimensional mass fit to each final state are given along with the cross sections, differential cross sections and polarization, where possible, for the hypercharge exchange reactions p p → Λ Y ∗ (1385), Λ Y ∗ (1520), Σ Y ∗ (1385) and Σ Y ∗ (1520) .

4 data tables
Table 1

INCOHERENT BREIT-WIGNER RESONANCE FUNCTIONS PLUS PHASE-SPACE FITS TO EACH CHANNEL.

Table 2

No description provided.

Table 3

No description provided.

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Analysis of the anti-p p --> anti-p p pi+ pi- Reaction at 5.7-GeV/c

Atherton, H.W. ; French, B.R. ; Skura, J. ; et al.
Nucl.Phys.B 103 (1976) 381-398, 1976.
Inspire Record 113033 DOI 10.17182/hepdata.36027

From 63 760 four pronged events we have selected 10 960 events of the p p π + π − final state. We have studied baryon resonances production and the associated production of Δ(1236) Δ (1236) isobars. We find (48.5 ± 2.6)% of Δ ++ Δ ++ and (4.5 ± 0.5)% of Δ 0 Δ 0 . Study of the various mass spectra shows that they are essentially described by the introduction of Δ ++ ( Δ ++ ) production. Introduction of the strong t dependence of the Δ ++ ( Δ ++ ) changes this description only slightly. A study of the interaction radius of the p π system reveals a best value of r = 1.6 ± 0.4 fm. Bumps observed in the p π + π − + c.c. system at 1450 and 1690 MeV when treated as resonances give rates of (4.0 ± 0.4)% and (4.5 ± 0.4)% respectively. We arrive at the conclusion that the reaction p p → p p π + π − at 5.7 GeV/ c proceeds almost entirely via the production of baryon resonances.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


The Reaction anti-p p --> anti-p p pi+ pi- pi0 at 5.7-GeV/c and a p Omega0 (anti-p Omega0) Enhancement at 1.81-GeV

Atherton, H.W. ; Bar-Nir, I. ; French, B. ; et al.
Nuovo Cim.A 30 (1975) 505, 1975.
Inspire Record 90795 DOI 10.17182/hepdata.37672

The final states\(\bar p\)pω and\(\Delta ^{ ++ } \bar \Delta ^{ -- } \pi ^0 \), produced in the reaction\(\bar p\)p →\(\bar p\)pπ+π−π0 (6435 events) at 5.7 GeV/c, are studied. Cross-sections are presented, and general features of the resonances produced are investigated. Spin alignment of the ω’s, reported earlier, is studied. An enhancement is observed in the ωp (ω\(\bar p\)) mass plot of mass (1810±15) MeV and width (87 ± 20) MeV.

1 data table
Table 1

No description provided.