ON THE ELECTROPRODUCTION OF STRANGE PARTICLES ON NUCLEONS

1965 ◽  
Vol 43 (6) ◽  
pp. 1115-1127
Author(s):  
Bryan A. Orman
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Energy Region ◽  
Differential Cross Sections ◽  
Nucleon Resonances ◽  
Strange Particles ◽  
Pion Nucleon

We discuss the electroproduction of strange particles on nucleons with particular interest in the energy region where the pion–nucleon resonances are dominant. By using the method of Blankenbecler and Gartenhaus (1959), formulae are derived for solving the problems in this region. Differential cross sections of the order of 10−39 cm2/MeV are obtained.

Measurement of differential cross sections of π+p and π−p elastic scattering in the region of low-lying pion nucleon resonances

1981 ◽  
Vol 364 (2-3) ◽  
pp. 408-428 ◽  
Author(s):  
V.A. Gordeev ◽  
V.P. Koptev ◽  
S.P. Kruglov ◽  
L.A. Kuz'min ◽  
A.A. Kulbardis ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Cross Sections ◽  
Differential Cross ◽  
Differential Cross Sections ◽  
Nucleon Resonances ◽  
Pion Nucleon

New analysis of the low-energy π±p differential cross-sections of the CHAOS Collaboration

2015 ◽  
Vol 24 (07) ◽  
pp. 1550050 ◽  
Author(s):  
E. Matsinos ◽  
G. Rasche
Keyword(s):  
Experimental Data ◽  
Cross Sections ◽  
Differential Cross ◽  
Form Factors ◽  
Partial Wave Analysis ◽  
Meson Mass ◽  
Data Sets ◽  
Differential Cross Sections ◽  
Pion Nucleon ◽  
Meson Factory

In a previous paper, we reported the results of a partial-wave analysis (PWA) of the pion–nucleon (πN) differential cross-sections (DCSs) of the CHAOS Collaboration and came to the conclusion that the angular distribution of their π+p data sets is incompatible with the rest of the modern (meson factory) database. The present work, re-addressing this issue, has been instigated by a number of recent improvements in our analysis, namely regarding the inclusion of the theoretical uncertainties when investigating the reproduction of experimental data sets on the basis of a given "theoretical" solution, modifications in the parametrization of the form factors of the proton and of the pion entering the electromagnetic part of the πN amplitude, and the inclusion of the effects of the variation of the σ-meson mass when fitting the ETH model of the πN interaction to the experimental data. The new analysis of the CHAOS DCSs confirms our earlier conclusions and casts doubt on the value for the πN Σ term, which Stahov, Clement and Wagner have extracted from these data.

Differential Cross Sections for Neutral-Pion Electroproduction Near the First Pion-Nucleon Resonance

1968 ◽  
Vol 20 (19) ◽  
pp. 1070-1073 ◽  
Author(s):  
C. Mistretta ◽  
D. Imrie ◽  
J. A. Appel ◽  
R. Budnitz ◽  
L. Carroll ◽  
...  
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Neutral Pion ◽  
Nucleon Resonance ◽  
Differential Cross Sections ◽  
Pion Electroproduction ◽  
Pion Nucleon

The 98° differential cross sections for the reactions 13C(γ,n0)12C and 13C(γ,n1)12C

1977 ◽  
Vol 55 (19) ◽  
pp. 1704-1715 ◽  
Author(s):  
J. G. Woodworth ◽  
K. G. McNeill ◽  
J. W. Jury ◽  
P. D. Georgopulos ◽  
R. G. Johnson
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Differential Cross ◽  
Energy Region ◽  
Level Structure ◽  
Similar Reaction ◽  
Differential Cross Sections ◽  
Isospin Splitting ◽  
The Cross ◽  
Theoretical Results

The differential cross sections at 98° for the reactions 13C(γ,n0)12C and 13C(γ,n1)12C were measured over the range of 6.0 to 37.0 MeV and 10.5 to 35.5 MeV, respectively. The cross sections are compared with previous results on the same nucleus or results from the similar reaction 12C(p,γ0)13N. In the region of the so-called pygmy resonance (about 13.5 MeV) there are many sharp resonances which correspond very well with the level structure of 13C as deduced from several other studies using various reactions. For the full energy region studied, further evidence for the isospin splitting of the 13C photoneutron cross section is obtained. In comparison of the cross sections with recent theoretical results, general agreement is obtained. However, several details of this comparison are in disagreement; the implications of this disagreement are discussed.

Differential cross sections of neutral pion photoproduction from hydrogen in the energy region from 390 MeV to 975 MeV

1980 ◽  
Vol 168 (2) ◽  
pp. 222-242 ◽  
Author(s):  
M. Yoshioka ◽  
A. Noda ◽  
M. Daigo ◽  
Y. Hemmi ◽  
R. Kikuchi ◽  
...  
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Energy Region ◽  
Neutral Pion ◽  
Pion Photoproduction ◽  
Differential Cross Sections
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