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.

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.

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 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 Recent progress in the partial wave analysis of the diffractively produced π−π+π− final state at Compass

2019 ◽  
Vol 199 ◽  
pp. 02003 ◽  
Author(s):  
Fabian Krinner
Keyword(s):  
Partial Wave ◽  
Pion Production ◽  
Recent Progress ◽  
Large Data ◽  
Partial Wave Analysis ◽  
Wave Analysis ◽  
Final State ◽  
Data Set ◽  
Large Data Set

The Compass spectrometer at CERN has collected a large data set for diffractive three-pion production of 46 × 106 exclusive events. Based on previous conventional Partial-Wave Analyses (PWA), we performed a “freed-isobar PWA” on the same data, removing model assumptions on the dynamic isobar amplitudes for dominating waves. In this analysis, we encountered continuous mathematical ambiguities, which we were able to identify and resolve. This analysis gives an unprecedented insight in the interplay of 2π and 3π dynamics in the process. As an example we show results for a spin-exotic wave $J_{{X^ - }}^{PC} = {1^{ - + }}$ wave.

scholarly journals STUDY OF EXCITED NUCLEONS AND THEIR STRUCTURE

2014 ◽  
Vol 26 ◽  
pp. 1460050 ◽  
Author(s):  
VOLKER D. BURKERT
Keyword(s):  
Lattice Qcd ◽  
Partial Wave ◽  
Excitation Spectrum ◽  
High Precision ◽  
Meson Production ◽  
Partial Wave Analysis ◽  
Production Data ◽  
Wave Analysis ◽  
Analysis Techniques ◽  
Recent Advances

Recent advances in the study of excited nucleons are discussed. Much of the progress has been achieved due to the availability of high precision meson production data in the photoproduction and electroproduction sectors, the development of multi-channel partial wave analysis techniques, and advances in Lattice QCD with predictions of the full excitation spectrum.

Partial-wave analysis ofn+Am241reaction cross sections in the resonance region

2015 ◽  
Vol 92 (1) ◽  
Author(s):  
G. Noguere ◽  
O. Bouland ◽  
S. Kopecky ◽  
C. Lampoudis ◽  
P. Schillebeeckx ◽  
...  
Keyword(s):  
Partial Wave ◽  
Cross Sections ◽  
Resonance Region ◽  
Partial Wave Analysis ◽  
Wave Analysis

Comment on ‘‘Pion-nucleon partial-wave analysis to 2 GeV’’

1995 ◽  
Vol 52 (9) ◽  
pp. 5378-5380 ◽  
Author(s):  
M. L. Dowell ◽  
G. A. Rebka
Keyword(s):  
Partial Wave ◽  
Partial Wave Analysis ◽  
Wave Analysis ◽  
Pion Nucleon
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