REFLECTIONS ON AMPLITUDE ANALYSIS

2003 ◽  
Vol 18 (03) ◽  
pp. 355-366
Author(s):  
A. Donnachie
Keyword(s):  
Partial Wave ◽  
Partial Wave Analysis ◽  
Wave Analysis ◽  
Amplitude Analysis ◽  
Two Component

The role of analyticity in partial wave analysis is emphasized and the concept of two-component duality is introduced and illustrated with examples from π N scattering. An intrinsic n-fold ambiguity in partial wave analysis is discussed in terms of Barrelet zeros and techniques for removing the ambiguities are outlined. The problems of resonance backgrounds are touched upon.

scholarly journals Role of Spin in NN → NNπ

2016 ◽  
Vol 40 ◽  
pp. 1660061
Author(s):  
Vadim Baru
Keyword(s):  
Partial Wave ◽  
Pion Production ◽  
Low Energy ◽  
Partial Wave Analysis ◽  
P Wave ◽  
Wave Analysis ◽  
Theoretical Predictions

The recent measurements of the reactions [Formula: see text] and [Formula: see text] by the ANKE collaboration at COSY are analyzed with the focus on the p-wave pion production amplitudes. These amplitudes are known to provide an important connection between [Formula: see text] and other low-energy few-nucleon reactions. The results of the recent partial wave analysis of the ANKE data are discussed and compared with the theoretical predictions.

scholarly journals Partial wave analysis of HADES data for two-pion production in pion-nucleon reactions

2019 ◽  
Vol 199 ◽  
pp. 02001
Author(s):  
I. Ciepał ◽  
W. Przygoda ◽  
A. V. Sarantsev
Keyword(s):  
Partial Wave ◽  
Pion Production ◽  
Meson Production ◽  
Resonance Region ◽  
Partial Wave Analysis ◽  
Wave Analysis ◽  
Final State ◽  
Hades Collaboration ◽  
Pion Nucleon

Pion beams are perfect tools to probe resonance excitations at a fixed energy, thus properties of baryonic resonances and their coupling channels can be studied. The HADES Collaboration performed a systematic scan around the second resonance region at four different pion beam momenta 0.656, 0.69, 0.748 and 0.8 GeV/c in π− p reaction. The role of the N(1520) resonance in conjunction with the intermediate ρ-meson production has been studied in the framework of a partial wave analysis. Preliminary results on exclusive channels with one pion (π− p) and two pions (nπ+π− and pπ−π0) in the final state are presented.

THE SAID PWA PROGRAM

2003 ◽  
Vol 18 (03) ◽  
pp. 449-455 ◽  
Author(s):  
R. A. Arndt ◽  
I. I. Strakovsky ◽  
R. L. Workman
Keyword(s):  
Partial Wave ◽  
Database Management ◽  
Pion Photoproduction ◽  
Partial Wave Analysis ◽  
Wave Analysis ◽  
Amplitude Analysis ◽  
Multipole Analysis ◽  
Resonance Properties ◽  
Made In

The range of SAID activities is outlined. These include database management, partial-wave analysis, and the determination of resonance properties. As the relationships between amplitude analysis, partial-wave analysis, and resonance extraction are often confused, comments are made in order to clarify the key differences. The multipole analysis of single-pion photoproduction is described in detail in order to show model-dependence appears in our fits to data.

scholarly journals Partial Wave Analysis of HADES Data for Two-Pion Production in Pion-Nucleon Reactions

2020 ◽  
Vol 241 ◽  
pp. 03001
Author(s):  
I. Ciepał
Keyword(s):  
Partial Wave ◽  
Meson Production ◽  
Resonance Region ◽  
Partial Wave Analysis ◽  
Wave Analysis ◽  
Final State ◽  
Decay Channels ◽  
Hades Collaboration ◽  
Pion Nucleon

Pion beams are important tools to study features of baryonic resonances and their decay channels because resonances are produced in s-channel at fixed mass equal to √s. In 2014 the HADES collaboration has performed systematic measurements in the second resonance region scanning around the mass of the N*(1520). Pion beams at four momenta (0.654, 0.686, 0.738 and 0.787 GeV/c) impinging on polyethylene and carbon targets have been used. With the use of the multichannel Partial Wave Analysis (PWA) the role of the N*(1520) resonance in conjunction with the intermediate ρ-meson production has been studied. Preliminary results at 0.654 GeV/c on exclusive production of two pions (ηπ+π- and pπ-π0) in the final state are presented.

scholarly journals Partial wave analysis of HADES data for two-pion production in pion-nucleon reactions

2019 ◽  
Vol 199 ◽  
pp. 01024
Author(s):  
I. Ciepał ◽  
W. Przygoda ◽  
A. V. Sarantsev
Keyword(s):  
Partial Wave ◽  
Pion Production ◽  
Meson Production ◽  
Resonance Region ◽  
Partial Wave Analysis ◽  
Wave Analysis ◽  
Final State ◽  
Hades Collaboration ◽  
Pion Nucleon

Pion beams are perfect tools to probe resonance excitations at a fixed energy, thus properties of baryonic resonances and their coupling channels can be studied. The HADES Collaboration performed a systematic scan around the second resonance region at four different pion beam momenta 0.656, 0.69, 0.748 and 0.8 GeV/c in π− p reaction. The role of the N(1520) resonance in conjunction with the intermediate ρ-meson production has been studied in the framework of a partial wave analysis. Preliminary results on exclusive channels with one pion (π− p) and two pions (nπ+π− and pπ−π0) in the final state are presented.

Bonding and stability in the ordered alloys FeV and CoTi. Comparison with FeTi

1985 ◽  
Vol 50 (10) ◽  
pp. 2093-2100
Author(s):  
Štěpán Pick ◽  
Mojmír Tomášek ◽  
Mojmír Šob
Keyword(s):  
Phase Diagrams ◽  
Partial Wave ◽  
Partial Wave Analysis ◽  
Intermetallic Alloys ◽  
Wave Analysis ◽  
Ordered Alloys ◽  
Ordered Intermetallic ◽  
Cscl Structure ◽  
Ionic Effects

Partial wave analysis together with the qualitative examination of hybridization has been performed for two ordered intermetallic alloys with CsCl structure, FeV, and CoTi. The results resemble those obtained previously for FeTi, although important deviations are present as well. The stabilization of the ordered phase is again due to ionic effects. Qualitative arguments are suggested to explain the small stability of the CsCl phase of FeV and some differences in the FeTi and CoTi phase diagrams.

New data on the reaction K−p→Λπ0 from 1.934 to 2.516 GeV/c and partial-wave analysis for this reaction between 2070 MeV and 2436 MeV CMS energy

1975 ◽  
Vol 90 ◽  
pp. 1-19 ◽  
Author(s):  
A. de Bellefon ◽  
A. Berthon ◽  
J. Brunet ◽  
G. Tristram ◽  
J. Vrana ◽  
...  
Keyword(s):  
Partial Wave ◽  
Partial Wave Analysis ◽  
Wave Analysis

Partial-wave analysis of K−p → π0Λ (1520) between 1710 and 2170 MeV c.m. energy including new data between 1775 and 1960 MeV

1977 ◽  
Vol 131 (4-5) ◽  
pp. 399-420 ◽  
Author(s):  
W. Cameron ◽  
B. Franek ◽  
G.P. Gopal ◽  
G.E. Kalmus ◽  
A.C. McPherson ◽  
...  
Keyword(s):  
Partial Wave ◽  
Partial Wave Analysis ◽  
Wave Analysis

Partial-Wave Analysis in Terms of the Homogeneous Lorentz Group

1967 ◽  
Vol 164 (5) ◽  
pp. 1981-1990 ◽  
Author(s):  
R. Delbourgo ◽  
Abdus Salam ◽  
J. Strathdee
Keyword(s):  
Partial Wave ◽  
Lorentz Group ◽  
Partial Wave Analysis ◽  
Wave Analysis ◽  
Homogeneous Lorentz Group
Sign in / Sign up

Export Citation Format

Share Document