Lakin, W.L.
Pion-Proton Scattering
Max results
Sort by Reverse order

Showing 3 of 3 results

PRISM Plot Analysis of the Reaction pi- p --> pi- pi- pi+ p at 13-GeV/c

Gaidos, J.A. ; Yen, W.L. ;
Phys.Rev.D 19 (1979) 22-42, 1979.
Inspire Record 135845 DOI 10.17182/hepdata.24296

Fourteen reaction channels contributing to the final state have been separated by a prism-plot analysis of π−p→π−π−π+p interactions at 13.2 GeV/c. The results of this study are presented in terms of partial and differential cross sections, invariant-mass and decay-angular distributions, and comparisons with other separation techniques for the various resonant states.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


A SPARK CHAMBER MEASUREMENT OF THE REACTIONS PI+- P ---> RHO+- P AT 15-GEV/C

Pratt, J.C. ; Kaune, W.T. ; Lakin, W.L. ; et al.
Phys.Lett.B 41 (1972) 383, 1972.
Inspire Record 73430 DOI 10.17182/hepdata.28236

A new method, using spark chambers, for the study of the reactions π ± + p → ϱ ± + p is described. The charged pion and both γ rays from the π ± decay are detected. Differential and integrated cross sections σ π + =50 ± 9 μ b, σ π − =47 ± 9 μ b) for 0.0 ⩽| t |⩽1. (GeV/ c ) 2 and a laboratory momentum ( p Lab ) of 15 GeV/c are presented. The momentum dependence of σ γ ± is well fitted from 2.7 to 16 GeV/c by σ = K p Lab − with n γ + = 1.80 ± 0.80 and n γ − = 1.87 ± 0.15.

2 data tables
Table 1

Axis error includes +- 17/17 contribution.

Table 2

Axis error includes +- 17/17 contribution.


pi-p Two-Prong Interactions at 4.16 GeV/c

Eisner, R.L. ; Johnson, P.B. ; Klein, P.R. ; et al.
Phys.Rev. 164 (1967) 1699-1710, 1967.
Inspire Record 52292 DOI 10.17182/hepdata.26569

An analysis of π−p two-prong interactions at 4.16 GeV/c is presented. The total two-prong cross section is 19.11±0.40 mb, based on 33 672 events. The elastic-scattering differential cross section shows an exponential behavior, Kexp(−AΔ2). With A=7.36±0.14 GeV−2, the "absorption parameters" are derived as C+=0.846±0.017 and γ+=0.040±0.001. The final-state π−π0p exhibits a strong ρ−, and the π−π+n a strong ρ0 and f0. The partial cross sections for the dominant resonant channels pρ−, π−Δ+(1236) (→pπ0), ρ0n, and f0n are 0.59±0.03, 0.17±0.01, 1.15±0.05, and 0.53±0.06 mb, respectively. The ρ− production and decay angular distributions do not agree with the predictions of the absorption-modified one-pion-exchange model. However, an inclusion of the contribution from ω exchange adequately accounts for the discrepancy. The ρ0 asymmetry is interpreted as a result of an interference of the resonant P wave and isospin-zero S wave, and the corresponding spin-density matrix elements are obtained. In the final state π−p+neutrals, a clear peak for the η meson and some evidence for the ω meson are seen.

1 data table
Table 1

Axis error includes +- 0.0/0.0 contribution (?////EVENT NORMALIZATION).